flexbooks.ck12.org Open in urlscan Pro
2600:9000:2156:2200:8:f05f:c540:93a1 Public Scan

Go To Rescan
Add Verdict Report

Submitted URL:
http://flexbooks.ck12.org/
Effective URL:
https://flexbooks.ck12.org/flexbooks/
Submission: On February 16 via api (February 16th 2024, 1:17:50 am UTC) from US — Scanned from DE

Summary HTTP 138 Redirects Links 68 Behaviour Indicators

Summary

This website contacted 16 IPs in 3 countries across 7 domains to perform 138 HTTP transactions. The main IP is 2600:9000:2156:2200:8:f05f:c540:93a1, located in United States and belongs to AMAZON-02, US. The main domain is flexbooks.ck12.org. The Cisco Umbrella rank of the primary domain is 71312.
TLS certificate: Issued by Go Daddy Secure Certificate Authority... on December 7th 2023. Valid for: a year.

This is the only time flexbooks.ck12.org was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

	IP Address	AS Autonomous System
2 23	2600:9000:215... 2600:9000:2156:2200:8:f05f:c540:93a1	16509 (AMAZON-02) (AMAZON-02)
5	2600:9000:215... 2600:9000:2156:e00:8:f05f:c540:93a1	16509 (AMAZON-02) (AMAZON-02)
46	2600:9000:212... 2600:9000:2127:dc00:8:f05f:c540:93a1	16509 (AMAZON-02) (AMAZON-02)
10	2600:9000:215... 2600:9000:2156:1e00:8:f05f:c540:93a1	16509 (AMAZON-02) (AMAZON-02)
6	2600:9000:21f... 2600:9000:21f3:a00:1f:8b19:b780:93a1	16509 (AMAZON-02) (AMAZON-02)
3	18.66.122.62 18.66.122.62	16509 (AMAZON-02) (AMAZON-02)
3	2a00:1450:400... 2a00:1450:400c:c09::54	15169 (GOOGLE) (GOOGLE)
5	2600:9000:264... 2600:9000:2646:d600:12:aac7:4140:93a1	16509 (AMAZON-02) (AMAZON-02)
2	2a00:1450:400... 2a00:1450:4001:812::2008	15169 (GOOGLE) (GOOGLE)
2	2600:9000:225... 2600:9000:2250:f800:14:71e4:46c0:93a1	16509 (AMAZON-02) (AMAZON-02)
1	2600:1901:0:4... 2600:1901:0:498c::	396982 (GOOGLE-CL...) (GOOGLE-CLOUD-PLATFORM)
4	2a00:1450:400... 2a00:1450:4001:802::200e	15169 (GOOGLE) (GOOGLE)
4	2a04:4e42:200... 2a04:4e42:200::729	54113 (FASTLY) (FASTLY)
2	2001:4860:480... 2001:4860:4802:34::36	15169 (GOOGLE) (GOOGLE)
24	2600:9000:25e... 2600:9000:25eb:fe00:f:a35f:3100:93a1	16509 (AMAZON-02) (AMAZON-02)
138	16

23 2600:9000:2156:2200:8:f05f:c540:93a1 (United States) 2 redirects

ASN16509 (AMAZON-02, US)

flexbooks.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

5 2600:9000:2156:e00:8:f05f:c540:93a1 (United States)

ASN16509 (AMAZON-02, US)

static1.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

46 2600:9000:2127:dc00:8:f05f:c540:93a1 (United States)

ASN16509 (AMAZON-02, US)

static2.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

10 2600:9000:2156:1e00:8:f05f:c540:93a1 (United States)

ASN16509 (AMAZON-02, US)

static3.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools
www.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

6 2600:9000:21f3:a00:1f:8b19:b780:93a1 (United States)

ASN16509 (AMAZON-02, US)

static.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

3 18.66.122.62 (United States)

ASN16509 (AMAZON-02, US)
PTR: server-18-66-122-62.fra60.r.cloudfront.net

tinymce.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

3 2a00:1450:400c:c09::54 (Brussels, Belgium)

ASN15169 (GOOGLE, US)

accounts.google.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

5 2600:9000:2646:d600:12:aac7:4140:93a1 (United States)

ASN16509 (AMAZON-02, US)

d3lkjnwva6z405.cloudfront.net	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

2 2a00:1450:4001:812::2008 (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)

www.googletagmanager.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

2 2600:9000:2250:f800:14:71e4:46c0:93a1 (United States)

ASN16509 (AMAZON-02, US)

capi.ck12.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 2600:1901:0:498c:: (Kansas City, United States)

ASN396982 (GOOGLE-CLOUD-PLATFORM, US)

cdn.mxpnl.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

4 2a00:1450:4001:802::200e (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)

www.google-analytics.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

4 2a04:4e42:200::729 (United States)

ASN54113 (FASTLY, US)

js.sentry-cdn.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools
browser.sentry-cdn.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

2 2001:4860:4802:34::36 (United States)

ASN15169 (GOOGLE, US)

region1.google-analytics.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

24 2600:9000:25eb:fe00:f:a35f:3100:93a1 (United States)

ASN16509 (AMAZON-02, US)

dr282zn36sxxg.cloudfront.net	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

	Apex Domain Subdomains	Transfer
95	ck12.org 2 redirects flexbooks.ck12.org — Cisco Umbrella Rank: 71312 static1.ck12.org — Cisco Umbrella Rank: 76644 static2.ck12.org — Cisco Umbrella Rank: 73757 static3.ck12.org — Cisco Umbrella Rank: 83179 static.ck12.org — Cisco Umbrella Rank: 71631 tinymce.ck12.org — Cisco Umbrella Rank: 77754 www.ck12.org — Cisco Umbrella Rank: 56055 capi.ck12.org — Cisco Umbrella Rank: 84122	1 MB
29	cloudfront.net d3lkjnwva6z405.cloudfront.net dr282zn36sxxg.cloudfront.net	1 MB
6	google-analytics.com www.google-analytics.com — Cisco Umbrella Rank: 45 region1.google-analytics.com — Cisco Umbrella Rank: 2000	22 KB
4	sentry-cdn.com js.sentry-cdn.com — Cisco Umbrella Rank: 6543 browser.sentry-cdn.com — Cisco Umbrella Rank: 5392	59 KB
3	google.com accounts.google.com — Cisco Umbrella Rank: 30	81 KB
2	googletagmanager.com www.googletagmanager.com — Cisco Umbrella Rank: 52	211 KB
1	mxpnl.com cdn.mxpnl.com — Cisco Umbrella Rank: 4189	19 KB
138	7

	Domain	Requested by
46	static2.ck12.org	flexbooks.ck12.org static3.ck12.org static1.ck12.org static2.ck12.org
24	dr282zn36sxxg.cloudfront.net	flexbooks.ck12.org
23	flexbooks.ck12.org	2 redirects flexbooks.ck12.org static3.ck12.org static2.ck12.org browser.sentry-cdn.com
6	www.ck12.org	static.ck12.org www.googletagmanager.com flexbooks.ck12.org
6	static.ck12.org	flexbooks.ck12.org static2.ck12.org
5	d3lkjnwva6z405.cloudfront.net	flexbooks.ck12.org d3lkjnwva6z405.cloudfront.net
5	static1.ck12.org	flexbooks.ck12.org
4	www.google-analytics.com	www.googletagmanager.com www.google-analytics.com
4	static3.ck12.org	flexbooks.ck12.org
3	accounts.google.com	flexbooks.ck12.org accounts.google.com
3	tinymce.ck12.org	flexbooks.ck12.org tinymce.ck12.org
2	region1.google-analytics.com	www.googletagmanager.com
2	browser.sentry-cdn.com	js.sentry-cdn.com
2	js.sentry-cdn.com	www.googletagmanager.com
2	capi.ck12.org	flexbooks.ck12.org
2	www.googletagmanager.com	flexbooks.ck12.org www.googletagmanager.com
1	cdn.mxpnl.com	flexbooks.ck12.org
138	17

This site contains links to these domains. Also see Links.

Domain
www.ck12.org
ck12support.zendesk.com
interactives.ck12.org
www.ck12info.org
status.ck12.org
ck12foundation.medium.com
help.ck12.org
www.facebook.com
twitter.com
www.linkedin.com
www.pinterest.com

Subject Issuer	Validity	Valid
*.ck12.org Go Daddy Secure Certificate Authority - G2	`2023-12-07` - `2025-01-07`	a year	crt.sh
accounts.google.com GTS CA 1C3	`2024-01-29` - `2024-04-22`	3 months	crt.sh
*.cloudfront.net Amazon RSA 2048 M01	`2023-10-10` - `2024-09-19`	a year	crt.sh
*.google-analytics.com GTS CA 1C3	`2024-01-29` - `2024-04-22`	3 months	crt.sh
*.mxpnl.com GeoTrust TLS RSA CA G1	`2023-07-12` - `2024-08-11`	a year	crt.sh
*.sentry-cdn.com GlobalSign Atlas R3 DV TLS CA 2023 Q3	`2023-08-01` - `2024-09-01`	a year	crt.sh

This page contains 1 frames:

Primary Page: https://flexbooks.ck12.org/flexbooks/
Frame ID: D62E0552900B9F70FEC5B1BA293339D1
Requests: 145 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Page Title

K-12 FlexBooks | CK-12 Foundation

Page URL History Show full URLs

http://flexbooks.ck12.org/ HTTP 301
https://flexbooks.ck12.org/ HTTP 301
https://flexbooks.ck12.org/flexbooks/ Page URL

Detected technologies

Google Sign-in (Social logins) Expand

Overall confidence: 100%
Detected patterns

accounts\.google\.com/gsi/client

MathJax (JavaScript Graphics) Expand

Overall confidence: 100%
Detected patterns

([\d.]+)?/mathjax\.js

RequireJS (JavaScript Frameworks) Expand

Overall confidence: 100%
Detected patterns

require.*\.js

Google Analytics (Analytics) Expand

Overall confidence: 100%
Detected patterns

google-analytics\.com/(?:ga|urchin|analytics)\.js

Google Tag Manager (Tag Managers) Expand

Overall confidence: 100%
Detected patterns

googletagmanager\.com/gtm\.js
googletagmanager\.com/gtag/js

Page Statistics

138
Requests

100 %
HTTPS

93 %
IPv6

7
Domains

17
Subdomains

16
IPs

3
Countries

2700 kB
Transfer

4936 kB
Size

10
Cookies

68 Outgoing links

These are links going to different origins than the main page.

URL: https://www.ck12.org/

Search URL Search Domain Scan URL

URL: https://ck12support.zendesk.com/hc/en-us/articles/8034176909723-Which-FlexBook-Is-Right-for-Me-
Title: What's the difference?

Search URL Search Domain Scan URL

URL: https://www.ck12.org/elementary-science/
Title: Grade K to 5

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/flexlets/#math
Title: Math FlexLets

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/flexlets/#science
Title: Science FlexLets

Search URL Search Domain Scan URL

URL: https://www.ck12.org/c/writing/
Title: Writing

Search URL Search Domain Scan URL

URL: https://www.ck12.org/c/spelling/
Title: Spelling

Search URL Search Domain Scan URL

URL: https://www.ck12.org/fbbrowse/list/?Subject=History&Grade=All%20Grades&Language=All%20Languages
Title: History

Search URL Search Domain Scan URL

URL: https://www.ck12.org/c/astronomy/
Title: Astronomy

Search URL Search Domain Scan URL

URL: https://www.ck12.org/c/engineering/
Title: Engineering

Search URL Search Domain Scan URL

URL: https://www.ck12.org/c/health/
Title: Health

Search URL Search Domain Scan URL

URL: https://www.ck12.org/fbbrowse/list?Language=All%20Languages&Subject=Photography&Grade=All%20Grades
Title: Photography

Search URL Search Domain Scan URL

URL: https://www.ck12.org/c/technology/
Title: Technology

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/adult-education/#adult-basic-education
Title: Basic Education

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/adult-education/#high-school-diploma
Title: High School Diploma

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/adult-education/#high-school-equivalency
Title: High School Equivalency

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/adult-education/#career-technical-education
Title: Career Technical Ed

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/adult-education/#ESL
Title: English as 2nd Language

Search URL Search Domain Scan URL

URL: https://www.ck12.org/chile/
Title: Chile

Search URL Search Domain Scan URL

URL: https://www.ck12.org/brasil/
Title: Brasil

Search URL Search Domain Scan URL

URL: https://www.ck12.org/cbse/
Title: India

Search URL Search Domain Scan URL

URL: https://www.ck12.org/georgia
Title: Georgia

Search URL Search Domain Scan URL

URL: https://www.ck12.org/fbbrowse/list?Language=Spanish&Subject=All%20Subjects&Grade=All%20Grades
Title: Spanish

Search URL Search Domain Scan URL

URL: https://interactives.ck12.org/simulations/physics.html?lang=ko
Title: Korean

Search URL Search Domain Scan URL

URL: https://interactives.ck12.org/simulations/physics.html?lang=de
Title: Deutsch

Search URL Search Domain Scan URL

URL: https://interactives.ck12.org/simulations/physics.html?lang=zh-TW
Title: Chinese

Search URL Search Domain Scan URL

URL: https://interactives.ck12.org/simulations/physics.html?lang=EL
Title: Greek

Search URL Search Domain Scan URL

URL: https://interactives.ck12.org/simulations/physics.html?lang=pl
Title: Polski

Search URL Search Domain Scan URL

URL: https://www.ck12.org/flexi/
Title: FlexiA FREE Digital Tutor for Every Student

Search URL Search Domain Scan URL

URL: https://www.ck12.org/fbbrowse/
Title: FlexBooksCustomizable, digital textbooks

Search URL Search Domain Scan URL

URL: https://www.ck12.org/schools/
Title: SchoolsFlexBooks from schools and districts near you

Search URL Search Domain Scan URL

URL: https://www.ck12.org/study-guides/
Title: Study GuidesQuick review with key information for each concept

Search URL Search Domain Scan URL

URL: https://www.ck12.org/assessment/ui/browse/practice/
Title: Adaptive PracticeBuilding knowledge at each student’s skill level

Search URL Search Domain Scan URL

URL: https://interactives.ck12.org/simulations/
Title: SimulationsInteractive Physics & Chemistry Simulations

Search URL Search Domain Scan URL

URL: https://interactives.ck12.org/plix/
Title: PLIXPlay. Learn. Interact. eXplore.

Search URL Search Domain Scan URL

URL: https://www.ck12.org/ccss/
Title: CCSS MathConcepts and FlexBooks aligned to Common Core

Search URL Search Domain Scan URL

URL: https://www.ck12.org/ngss/
Title: NGSSConcepts aligned to Next Generation Science Standards

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/certifiededucator/
Title: Certified EducatorStand out as an educator. Become CK-12 Certified.

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/ck12-webinars/
Title: WebinarsLive and archived sessions to learn about CK-12

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/overview/
Title: CK-12 Resources

Search URL Search Domain Scan URL

URL: https://www.ck12.org/conceptmap/
Title: Concept Map

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/testimonials/
Title: Testimonials

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/mission/
Title: CK-12 Mission

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/team/
Title: Meet the Team

Search URL Search Domain Scan URL

URL: https://ck12support.zendesk.com/hc/en-us
Title: CK-12 Helpdesk

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/flexlets/
Title: Pick a Subject

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/about/donate/?source=ck12_top_nav
Title: Donate

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/about/fbbrowse/
Title: Browse FlexBooks

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/partners/
Title: Partners

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/press/
Title: Press

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/careers/
Title: Careers

Search URL Search Domain Scan URL

URL: https://status.ck12.org/
Title: Status

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/security/
Title: Security

Search URL Search Domain Scan URL

URL: https://ck12foundation.medium.com/
Title: Blog

Search URL Search Domain Scan URL

URL: https://www.ck12.org/map/
Title: CK-12 Usage Map

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/certified-trainer/
Title: Certified Trainer

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/contact-us/
Title: Contact Us

Search URL Search Domain Scan URL

URL: https://www.ck12.org/college/
Title: College FlexBooks

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/tools-and-apps/
Title: Tools and Apps

Search URL Search Domain Scan URL

URL: https://help.ck12.org/hc/en-us/articles/204655064-Content-in-Languages-Other-Than-English
Title: How do I translate this page?

Search URL Search Domain Scan URL

URL: https://www.facebook.com/CK12Foundation

Search URL Search Domain Scan URL

URL: https://twitter.com/CK12Foundation

Search URL Search Domain Scan URL

URL: https://www.linkedin.com/company/75810

Search URL Search Domain Scan URL

URL: http://www.pinterest.com/ck12foundation/

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/terms-of-use/
Title: Terms of Use

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/privacy-policy/
Title: Privacy

Search URL Search Domain Scan URL

URL: https://www.ck12.org/pages/attribution-guidelines/
Title: Attribution Guide

Search URL Search Domain Scan URL

URL: https://www.ck12info.org/curriculum-materials-license/

Search URL Search Domain Scan URL

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

http://flexbooks.ck12.org/ HTTP 301
https://flexbooks.ck12.org/ HTTP 301
https://flexbooks.ck12.org/flexbooks/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

138 HTTP transactions
9 data transactions

Method
Protocol Status Resource
Path Size
x-fer Time
Latency Type
MIME-Type IP
Location

GET
H2

200

Primary Request / Show response
flexbooks.ck12.org/flexbooks/
Redirect Chain

http://flexbooks.ck12.org/
https://flexbooks.ck12.org/
https://flexbooks.ck12.org/flexbooks/

8 KB
4 KB

149ms
148ms

Document
text/html

2600:9000:2156:2200:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to

Full URL

https://flexbooks.ck12.org/flexbooks/

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2600:9000:2156:2200:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Apache/2.4.41 (Ubuntu) /

Resource Hash

2eb61b3772b39c5213fb6f4ec2432e957070a956d512f6bd7ccef19636abf916

Security Headers

Name	Value
Content-Security-Policy	frame-ancestors 'self' https://*.ck12.org; report-uri https://csp-report.ck12.org; report-to ck12-csp-endpoint;
Strict-Transport-Security	max-age=31536000; includeSubDomains; preload
X-Content-Type-Options	nosniff

Request headers

Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36
accept-language: de-DE,de;q=0.9

Response headers

alt-svc: h3=":443"; ma=86400
content-encoding: gzip
content-length: 3007
content-security-policy: frame-ancestors 'self' https://*.ck12.org; report-uri https://csp-report.ck12.org; report-to ck12-csp-endpoint;
content-type: text/html; charset=utf-8
date: Fri, 16 Feb 2024 01:17:44 GMT
referrer-policy: strict-origin-when-cross-origin
report-to: { "group": "ck12-csp-endpoint","max_age": 86400,"endpoints": [{ "url": " https://csp-report.ck12.org" }] }
reporting-endpoints: ck12-csp-endpoint="https://csp-report.ck12.org"
server: Apache/2.4.41 (Ubuntu)
strict-transport-security: max-age=31536000; includeSubDomains; preload
vary: Accept-Encoding
via: 1.1 bab8148a65b29113f79cf2725076287c.cloudfront.net (CloudFront)
x-amz-cf-id: UBghbv2_09VQfeVLxjLQG2QTsFONqSm8L0Y7VozhsguBkgMBjqdfLg==
x-amz-cf-pop: FRA50-C1
x-cache: Miss from cloudfront
x-content-type-options: nosniff

Redirect headers

alt-svc: h3=":443"; ma=86400
content-length: 0
content-security-policy: frame-ancestors 'self' https://*.ck12.org; report-uri https://csp-report.ck12.org; report-to ck12-csp-endpoint;
date: Fri, 16 Feb 2024 01:17:44 GMT
location: https://flexbooks.ck12.org/flexbooks/
referrer-policy: strict-origin-when-cross-origin
report-to: { "group": "ck12-csp-endpoint","max_age": 86400,"endpoints": [{ "url": " https://csp-report.ck12.org" }] }
reporting-endpoints: ck12-csp-endpoint="https://csp-report.ck12.org"
server: CloudFront
strict-transport-security: max-age=31536000; includeSubDomains; preload
via: 1.1 bab8148a65b29113f79cf2725076287c.cloudfront.net (CloudFront)
x-amz-cf-id: mpzYoUxRo3rrsjvBTYiCq33f_UWhTjGEVe9SKsMARxlYudeUj16Cqw==
x-amz-cf-pop: FRA50-C1
x-cache: Miss from cloudfront
x-content-type-options: nosniff

GET
H2 200 main.css
static1.ck12.org/media/build-20240207081958/course-book-app/dist/ 3 KB
2 KB 82ms
10ms Stylesheet
text/css 2600:9000:2156:e00:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to

Full URL: https://static1.ck12.org/media/build-20240207081958/course-book-app/dist/main.css
Requested by: Host: flexbooks.ck12.org
URL: https://flexbooks.ck12.org/flexbooks/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 2600:9000:2156:e00:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software: AmazonS3 /
Resource Hash: a049f365af6a7bdfbedd9ea900578b8851a1bcc3cc80dd7d5225c08d857e4011

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

date: Wed, 07 Feb 2024 10:01:19 GMT
content-encoding: gzip
via: 1.1 009e5e3e32afcd1d135a7234c9da5520.cloudfront.net (CloudFront)
last-modified: Wed, 07 Feb 2024 09:54:38 GMT
server: AmazonS3
x-amz-cf-pop: FRA50-C1
age: 746186
etag: W/"7ea5c576543e4295ac38eb3d96f21382"
vary: Accept-Encoding
x-cache: Hit from cloudfront
content-type: text/css
cache-control: max-age=31536000
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x-amz-cf-id: jAdFPBHDzp2Gvh5O536PY_7kDhpuZfHk_Ub2nfCTLMXUNXMbHYiH-Q==

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Full URL

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Full URL

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Show headers Download Go to

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Full URL

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Full URL

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X-Xss-Protection	0

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

date: Fri, 16 Feb 2024 01:17:45 GMT
content-security-policy: require-trusted-types-for 'script';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http, script-src 'report-sample' 'nonce-PAAFy-IKKzlV5CsvMaK4AA' 'unsafe-inline' 'strict-dynamic' https: http: 'unsafe-eval';object-src 'none';base-uri 'self';report-uri https://csp.withgoogle.com/csp/identity-sign-in-google-http
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content-encoding: gzip
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alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
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pragma: no-cache
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access-control-allow-methods: GET
content-type: application/json; charset=utf-8
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report-to: {"group":"coop_dd7de8473bddc59c6b748810a67a39b1","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/dd7de8473bddc59c6b748810a67a39b1"}]}
cache-control: no-cache, no-store, max-age=0, must-revalidate
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expires: Mon, 01 Jan 1990 00:00:00 GMT

POST
H3 200 event Show response
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384 B 300ms
299ms XHR
image/gif 2600:9000:2156:2200:8:f05f:c540:93a1
AMAZON-02

General

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Show headers Download Go to

Full URL

https://flexbooks.ck12.org/dexter/record/event

Requested by

Host: static2.ck12.org
URL: https://static2.ck12.org/media/build-20240207081958/dexterjs/dexterjs.min.js

Protocol

Security

QUIC, , AES_128_GCM

Server

2600:9000:2156:2200:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Apache/2.4.41 (Ubuntu) /

Resource Hash

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Security Headers

Name	Value
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Request headers

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accept-language: de-DE,de;q=0.9
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36
Content-Type: application/x-www-form-urlencoded;charset=UTF-8

Response headers

date: Fri, 16 Feb 2024 01:17:45 GMT
via: 1.1 d55780b776b171387055eca956ae29a8.cloudfront.net (CloudFront)
x-content-type-options: nosniff
x-amz-cf-pop: FRA50-C1
x-cache: Miss from cloudfront
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server: Apache/2.4.41 (Ubuntu)
vary: Origin
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
content-type: image/gif
access-control-allow-origin: https://flexbooks.ck12.org
access-control-allow-credentials: true
access-control-allow-headers: Content-Type, *
x-amz-cf-id: cNQjpEdH-rxQLlCe90etZ6PT_ssSfcZKWOGcAk6ho6NsQzZchx1fsA==

POST
H3 200 event Show response
flexbooks.ck12.org/dexter/record/ 40 B
386 B 303ms
303ms XHR
image/gif 2600:9000:2156:2200:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to

Full URL

https://flexbooks.ck12.org/dexter/record/event

Requested by

Host: static2.ck12.org
URL: https://static2.ck12.org/media/build-20240207081958/dexterjs/dexterjs.min.js

Protocol

Security

QUIC, , AES_128_GCM

Server

2600:9000:2156:2200:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Apache/2.4.41 (Ubuntu) /

Resource Hash

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Security Headers

Name	Value
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Request headers

Referer: https://flexbooks.ck12.org/flexbooks/student/
accept-language: de-DE,de;q=0.9
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36
Content-Type: application/x-www-form-urlencoded;charset=UTF-8

Response headers

date: Fri, 16 Feb 2024 01:17:45 GMT
via: 1.1 d55780b776b171387055eca956ae29a8.cloudfront.net (CloudFront)
x-content-type-options: nosniff
x-amz-cf-pop: FRA50-C1
x-cache: Miss from cloudfront
alt-svc: h3=":443"; ma=86400
content-length: 40
referrer-policy: strict-origin-when-cross-origin
server: Apache/2.4.41 (Ubuntu)
vary: Origin
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
content-type: image/gif
access-control-allow-origin: https://flexbooks.ck12.org
access-control-allow-credentials: true
access-control-allow-headers: Content-Type, *
x-amz-cf-id: twRRNSZhEfu-N1kHtDsMqrCIZJAOqsrKoUjSjfzFiYJuQMcq3NCtSw==

GET
DATA 200
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image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
Reverse DNS
Software: /
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Request headers

accept-language: de-DE,de;q=0.9
Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
DATA 200
OK truncated
/ 3 KB
0 Image
image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
Reverse DNS
Software: /
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Request headers

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Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
DATA 200
OK truncated
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0 Image
image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
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Request headers

accept-language: de-DE,de;q=0.9
Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
DATA 200
OK truncated
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0 Image
image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
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Request headers

accept-language: de-DE,de;q=0.9
Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
DATA 200
OK truncated
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0 Image
image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
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Software: /
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Request headers

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Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
DATA 200
OK truncated
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0 Image
image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
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Request headers

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Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
DATA 200
OK truncated
/ 855 B
0 Image
image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
Reverse DNS
Software: /
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Request headers

accept-language: de-DE,de;q=0.9
Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
DATA 200
OK truncated
/ 3 KB
0 Image
image/svg+xml

General

Check archive.org

Show headers Download Go to Show image

Full URL: data:truncated
Protocol: DATA
Server: -, , ASN (),
Reverse DNS
Software: /
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Request headers

accept-language: de-DE,de;q=0.9
Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

Content-Type: image/svg+xml

GET
H3 200 e45dc3383428ccd5dac4e9a36e97b55a.png
static2.ck12.org/media/build-20240207081958/course-book-app/dist/ 3 KB
3 KB 26ms
26ms Image
image/png 2600:9000:2127:dc00:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://static2.ck12.org/media/build-20240207081958/course-book-app/dist/e45dc3383428ccd5dac4e9a36e97b55a.png
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URL: https://flexbooks.ck12.org/flexbooks/student/
Protocol: H3
Security: QUIC, , AES_128_GCM
Server: 2600:9000:2127:dc00:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),
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Software: AmazonS3 /
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Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

date: Wed, 07 Feb 2024 10:01:25 GMT
via: 1.1 2a5c925255bb252ff0ed65977311f74e.cloudfront.net (CloudFront)
last-modified: Wed, 07 Feb 2024 09:54:38 GMT
server: AmazonS3
age: 746181
x-amz-cf-pop: PRG50-C1
etag: "e45dc3383428ccd5dac4e9a36e97b55a"
x-cache: Hit from cloudfront
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content-length: 2819
x-amz-cf-id: YvYlRy9RTaqahIA5N-f5qvCfG9Psneu0H8AfGlAn9dvjqc-Hme4SWQ==

GET
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static2.ck12.org/media/build-20240207081958/course-book-app/dist/ 2 KB
2 KB 27ms
26ms Image
image/png 2600:9000:2127:dc00:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://static2.ck12.org/media/build-20240207081958/course-book-app/dist/c4a8f83aed2c431636233f5ca2e8d0f1.png
Requested by: Host: flexbooks.ck12.org
URL: https://flexbooks.ck12.org/flexbooks/student/
Protocol: H3
Security: QUIC, , AES_128_GCM
Server: 2600:9000:2127:dc00:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),
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Software: AmazonS3 /
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Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

date: Wed, 07 Feb 2024 10:01:25 GMT
via: 1.1 2a5c925255bb252ff0ed65977311f74e.cloudfront.net (CloudFront)
last-modified: Wed, 07 Feb 2024 09:54:37 GMT
server: AmazonS3
age: 746181
x-amz-cf-pop: PRG50-C1
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x-cache: Hit from cloudfront
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content-length: 1696
x-amz-cf-id: ke8Cuxs3vLVqasfBA6JEkKqQDRT5VEkO16ObCJvQDFG49R9kdARp0A==

GET
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static2.ck12.org/media/build-20240207081958/course-book-app/dist/ 2 KB
2 KB 28ms
27ms Image
image/png 2600:9000:2127:dc00:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://static2.ck12.org/media/build-20240207081958/course-book-app/dist/06f4aa379163b8895546e2968b7f337c.png
Requested by: Host: flexbooks.ck12.org
URL: https://flexbooks.ck12.org/flexbooks/student/
Protocol: H3
Security: QUIC, , AES_128_GCM
Server: 2600:9000:2127:dc00:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),
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Software: AmazonS3 /
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Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

date: Wed, 07 Feb 2024 10:01:26 GMT
via: 1.1 2a5c925255bb252ff0ed65977311f74e.cloudfront.net (CloudFront)
last-modified: Wed, 07 Feb 2024 09:54:36 GMT
server: AmazonS3
age: 746180
x-amz-cf-pop: PRG50-C1
etag: "06f4aa379163b8895546e2968b7f337c"
x-cache: Hit from cloudfront
content-type: image/png
cache-control: max-age=31536000
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GET
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static2.ck12.org/media/build-20240207081958/course-book-app/dist/ 953 B
1 KB 29ms
28ms Image
image/png 2600:9000:2127:dc00:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://static2.ck12.org/media/build-20240207081958/course-book-app/dist/4930252c7417b7631a4c92296cfd35fe.png
Requested by: Host: flexbooks.ck12.org
URL: https://flexbooks.ck12.org/flexbooks/student/
Protocol: H3
Security: QUIC, , AES_128_GCM
Server: 2600:9000:2127:dc00:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software: AmazonS3 /
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Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

date: Wed, 07 Feb 2024 10:01:26 GMT
via: 1.1 2a5c925255bb252ff0ed65977311f74e.cloudfront.net (CloudFront)
last-modified: Wed, 07 Feb 2024 09:54:37 GMT
server: AmazonS3
age: 746180
x-amz-cf-pop: PRG50-C1
etag: "4930252c7417b7631a4c92296cfd35fe"
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GET
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9 KB 13ms
13ms Image
image/svg+xml 2600:9000:2156:1e00:8:f05f:c540:93a1
AMAZON-02

General

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Show headers Download Go to Show image

Full URL

https://www.ck12.org/pages/flexlets/images/hiking_isometric.svg

Requested by

Host: flexbooks.ck12.org
URL: https://flexbooks.ck12.org/flexbooks/student/

Protocol

Security

QUIC, , AES_128_GCM

Server

2600:9000:2156:1e00:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

AmazonS3 /

Resource Hash

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Security Headers

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X-Content-Type-Options	nosniff

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

date: Wed, 14 Feb 2024 05:46:08 GMT
content-encoding: br
via: 1.1 ef13dd533b8dc9dcfdc35449cf88f808.cloudfront.net (CloudFront)
content-security-policy: frame-ancestors 'self' https://*.ck12.org; report-uri https://csp-report.ck12.org; report-to ck12-csp-endpoint;
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server: AmazonS3
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POST
H3 200 event Show response
flexbooks.ck12.org/dexter/record/ 40 B
385 B 298ms
298ms XHR
image/gif 2600:9000:2156:2200:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to

Full URL

https://flexbooks.ck12.org/dexter/record/event

Requested by

Host: static2.ck12.org
URL: https://static2.ck12.org/media/build-20240207081958/dexterjs/dexterjs.min.js

Protocol

Security

QUIC, , AES_128_GCM

Server

2600:9000:2156:2200:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Apache/2.4.41 (Ubuntu) /

Resource Hash

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Security Headers

Name	Value
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Request headers

Referer: https://flexbooks.ck12.org/flexbooks/student/
accept-language: de-DE,de;q=0.9
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36
Content-Type: application/x-www-form-urlencoded;charset=UTF-8

Response headers

date: Fri, 16 Feb 2024 01:17:46 GMT
via: 1.1 d55780b776b171387055eca956ae29a8.cloudfront.net (CloudFront)
x-content-type-options: nosniff
x-amz-cf-pop: FRA50-C1
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content-length: 40
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vary: Origin
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content-type: image/gif
access-control-allow-origin: https://flexbooks.ck12.org
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Full URL

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AMAZON-02

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AMAZON-02

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alt-svc: h3=":443"; ma=86400
x-amz-cf-id: EyubRSH_mNgHUyIIuTAo_y7Yo_TeudxFc8yb5wNffz32MAPZDxv2FA==

POST
H2 204 collect
region1.google-analytics.com/g/ 0
54 B 15ms
14ms Ping
text/plain 2001:4860:4802:34::36
GOOGLE

General

Check archive.org

Show headers Download Go to

Full URL: https://region1.google-analytics.com/g/collect?v=2&tid=G-7PBE4L0PZZ&gtm=45je42e0v873422330z86316912za200&_p=1708046265321&gcd=13l3l3l3l1&npa=0&dma_cps=sypham&dma=1&cid=1857212024.1708046266&ul=en-us&sr=1600x1200&uaa=&uab=&uafvl=&uamb=0&uam=&uap=&uapv=&uaw=0&pscdl=noapi&_s=2&sid=1708046265&sct=1&seg=0&dl=https%3A%2F%2Fflexbooks.ck12.org%2Fflexbooks%2Fstudent%2F&dt=K-12%20FlexBooks%20%7C%20CK-12%20Foundation&en=ab_flexi_banner_visible&_et=79&tfd=2689
Requested by: Host: www.googletagmanager.com
URL: https://www.googletagmanager.com/gtag/js?id=G-7PBE4L0PZZ&l=dataLayer&cx=c
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 2001:4860:4802:34::36 , United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software: Golfe2 /
Resource Hash: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

pragma: no-cache
date: Fri, 16 Feb 2024 01:17:46 GMT
server: Golfe2
content-type: text/plain
access-control-allow-origin: https://flexbooks.ck12.org
cache-control: no-cache, no-store, must-revalidate
access-control-allow-credentials: true
cross-origin-resource-policy: cross-origin
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length: 0
expires: Fri, 01 Jan 1990 00:00:00 GMT

POST
H3 200 event Show response
flexbooks.ck12.org/dexter/record/ 40 B
386 B 393ms
393ms XHR
image/gif 2600:9000:2156:2200:8:f05f:c540:93a1
AMAZON-02

General

Check archive.org

Show headers Download Go to

Full URL

https://flexbooks.ck12.org/dexter/record/event

Requested by

Host: browser.sentry-cdn.com
URL: https://browser.sentry-cdn.com/7.101.1/bundle.es5.min.js

Protocol

Security

QUIC, , AES_128_GCM

Server

2600:9000:2156:2200:8:f05f:c540:93a1 , United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Apache/2.4.41 (Ubuntu) /

Resource Hash

8417b93e9269905204080344cd815788500150b01bfdf8b91cde37bfd92d4d57

Security Headers

Name	Value
X-Content-Type-Options	nosniff

Request headers

Referer: https://flexbooks.ck12.org/flexbooks/student/
accept-language: de-DE,de;q=0.9
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36
Content-Type: application/x-www-form-urlencoded;charset=UTF-8

Response headers

date: Fri, 16 Feb 2024 01:17:47 GMT
via: 1.1 d55780b776b171387055eca956ae29a8.cloudfront.net (CloudFront)
x-content-type-options: nosniff
x-amz-cf-pop: FRA50-C1
x-cache: Miss from cloudfront
alt-svc: h3=":443"; ma=86400
content-length: 40
referrer-policy: strict-origin-when-cross-origin
server: Apache/2.4.41 (Ubuntu)
vary: Origin
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
content-type: image/gif
access-control-allow-origin: https://flexbooks.ck12.org
access-control-allow-credentials: true
access-control-allow-headers: Content-Type, *
x-amz-cf-id: E1J2qbzWJnscQ3F9LjTVTB7XbiWxRaEQP-5ZGLJoPk6OoGfXEjkl2Q==

GET
H3 200 collect
www.google-analytics.com/ 35 B
55 B 7ms
7ms Image
image/gif 2a00:1450:4001:802::200e
GOOGLE

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://www.google-analytics.com/collect?v=1&_v=j101&a=1510087716&t=pageview&_s=2&dl=https%3A%2F%2Fflexbooks.ck12.org%2Fflexbooks%2F&dp=%2Fflexbooks%2Fstudent%2F&ul=en-us&de=UTF-8&dt=K-12%20FlexBooks%20%7C%20CK-12%20Foundation&sd=24-bit&sr=1600x1200&vp=1600x1200&je=0&_u=aGBAAEAjAAAAACAAI~&jid=&gjid=&cid=1857212024.1708046266&tid=UA-5330854-2&_gid=654242290.1708046266&gtm=45He42e0n71NFJ3V2v6316912za200&gcd=13l3l3l3l1&dma_cps=sypham&dma=1&z=417049775

Protocol

Security

QUIC, , AES_128_GCM

Server

2a00:1450:4001:802::200e Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),

Reverse DNS

Software

Golfe2 /

Resource Hash

8337212354871836e6763a41e615916c89bac5b3f1f0adf60ba43c7c806e1015

Security Headers

Name	Value
X-Content-Type-Options	nosniff

Request headers

accept-language: de-DE,de;q=0.9
Referer: https://flexbooks.ck12.org/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.184 Safari/537.36

Response headers

pragma: no-cache
date: Thu, 15 Feb 2024 19:21:22 GMT
x-content-type-options: nosniff
last-modified: Sun, 17 May 1998 03:00:00 GMT
server: Golfe2
age: 21384
content-type: image/gif
access-control-allow-origin: *
cache-control: no-cache, no-store, must-revalidate
cross-origin-resource-policy: cross-origin
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length: 35
expires: Mon, 01 Jan 1990 00:00:00 GMT

Verdicts & Comments Add Verdict or Comment

53 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

10 Cookies

Cookies are little pieces of information stored in the browser of a user. Whenever a user visits the site again, he will also send his cookie values, thus allowing the website to re-identify him even if he changed locations. This is how permanent logins work.

Domain/Path	Expires	Name / Value
flexbooks.ck12.org/	1970-01-20 18:28:52	Name: X-Ck12-Cdn-Version Value: 202402070201
.ck12.org/	1970-01-20 18:27:28	Name: dexterjsSessionID Value: SOqBGCAtUxOCqQbmP6lQvHOLB
.ck12.org/	1970-01-20 22:46:38	Name: dexterjsVisitorID Value: prZm4jeHItdFoVLulNvNh4C42
.ck12.org/	1970-01-20 20:37:02	Name: _gcl_au Value: 1.1.1937024854.1708046265
.ck12.org/	1970-01-20 18:28:52	Name: _gid Value: GA1.2.654242290.1708046266
.ck12.org/	1970-01-20 18:37:31	Name: ck:country Value: DE
.ck12.org/	1970-01-21 04:03:26	Name: _ga Value: GA1.1.1857212024.1708046266
.ck12.org/	1970-01-20 18:27:26	Name: flxweb_role Value: student
.ck12.org/	1970-01-20 18:27:26	Name: _gat Value: 1
.ck12.org/	1970-01-21 04:03:26	Name: _ga_7PBE4L0PZZ Value: GS1.1.1708046265.1.1.1708046266.0.0.0

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header	Value
Content-Security-Policy	frame-ancestors 'self' https://*.ck12.org; report-uri https://csp-report.ck12.org; report-to ck12-csp-endpoint;
Strict-Transport-Security	max-age=31536000; includeSubDomains; preload
X-Content-Type-Options	nosniff

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

accounts.google.com
browser.sentry-cdn.com
capi.ck12.org
cdn.mxpnl.com
d3lkjnwva6z405.cloudfront.net
dr282zn36sxxg.cloudfront.net
flexbooks.ck12.org
js.sentry-cdn.com
region1.google-analytics.com
static.ck12.org
static1.ck12.org
static2.ck12.org
static3.ck12.org
tinymce.ck12.org
www.ck12.org
www.google-analytics.com
www.googletagmanager.com
18.66.122.62
2001:4860:4802:34::36
2600:1901:0:498c::
2600:9000:2127:dc00:8:f05f:c540:93a1
2600:9000:2156:1e00:8:f05f:c540:93a1
2600:9000:2156:2200:8:f05f:c540:93a1
2600:9000:2156:e00:8:f05f:c540:93a1
2600:9000:21f3:a00:1f:8b19:b780:93a1
2600:9000:2250:f800:14:71e4:46c0:93a1
2600:9000:25eb:fe00:f:a35f:3100:93a1
2600:9000:2646:d600:12:aac7:4140:93a1
2a00:1450:4001:802::200e
2a00:1450:4001:812::2008
2a00:1450:400c:c09::54
2a04:4e42:200::729
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0a8185be690b17583f7cc6b460852ec288beaed805969594dd5bf3ed31899bd7
0ba94c34d95bafcd76df10a15f20ff40712c71102c5fdea7083ed64f760eff1b
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1a1792570368fccae36f6c834b7e5f6ffbbe0641d3daa9ab5390debba034ab46
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1f0a3a812acee312d6a4de73a996cfea6fd9090ddff968b849d91134c5a36a72
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flexbooks.ck12.org Open in urlscan Pro 2600:9000:2156:2200:8:f05f:c540:93a1 Public Scan

Summary

urlscan.io Verdict: No classification

Domain & IP information

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Page Title

Page URL History Show full URLs

Detected technologies

Page Statistics

138 Requests

100 %HTTPS

93 %IPv6

7 Domains

17 Subdomains

16 IPs

3 Countries

2700 kBTransfer

4936 kBSize

10 Cookies

68 Outgoing links

Page URL History

Redirected requests

138 HTTP transactions Everything HTML Script AJAX CSS Image Expand all 9 data transactions

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flexbooks.ck12.org Open in urlscan Pro
2600:9000:2156:2200:8:f05f:c540:93a1 Public Scan

Screenshot
Live screenshot

Full Image

138
Requests

100 %
HTTPS

93 %
IPv6

7
Domains

17
Subdomains

16
IPs

3
Countries

2700 kB
Transfer

4936 kB
Size

10
Cookies

138 HTTP transactions
9 data transactions