usaco.org Open in urlscan Pro
188.114.96.3 Public Scan

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Submitted URL:
http://usaco.org/
Effective URL:
https://usaco.org/
Submission: On February 14 via api (February 14th 2024, 5:23:47 pm UTC) from US — Scanned from NL

Summary HTTP 17 Redirects Links 9 Behaviour Indicators

Summary

This website contacted 3 IPs in 2 countries across 3 domains to perform 17 HTTP transactions. The main IP is 188.114.96.3, located in Amsterdam, Netherlands and belongs to CLOUDFLARENET, US. The main domain is usaco.org. The Cisco Umbrella rank of the primary domain is 877790.
TLS certificate: Issued by GTS CA 1P5 on February 12th 2024. Valid for: 3 months.

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

urlscan.io Verdict: No classification

Domain & IP information

	IP Address	AS Autonomous System
1 15	188.114.96.3 188.114.96.3	13335 (CLOUDFLAR...) (CLOUDFLARENET)
1	104.26.6.30 104.26.6.30	13335 (CLOUDFLAR...) (CLOUDFLARENET)
2	104.17.24.14 104.17.24.14	13335 (CLOUDFLAR...) (CLOUDFLARENET)
17	3

15 188.114.96.3 (Amsterdam, Netherlands) 1 redirects

ASN13335 (CLOUDFLARENET, US)

usaco.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 104.26.6.30 (None, )

ASN13335 (CLOUDFLARENET, US)

d3js.org	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

2 104.17.24.14 (None, )

ASN13335 (CLOUDFLARENET, US)

cdnjs.cloudflare.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

	Apex Domain Subdomains	Transfer
15	usaco.org 1 redirects usaco.org — Cisco Umbrella Rank: 877790	350 KB
2	cloudflare.com cdnjs.cloudflare.com — Cisco Umbrella Rank: 257	76 KB
1	d3js.org d3js.org — Cisco Umbrella Rank: 22847	54 KB
17	3

	Domain	Requested by
15	usaco.org	1 redirects usaco.org
2	cdnjs.cloudflare.com	usaco.org cdnjs.cloudflare.com
1	d3js.org	usaco.org
17	3

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

Domain
www.ioinformatics.org
www.citadel.com
www.twosigma.com
www.deshaw.com
www.ansatzcapital.com
x-camp.academy
easyfuncoding.com
vplanetcoding.com
www.clemson.edu

Subject Issuer	Validity	Valid
usaco.org GTS CA 1P5	`2024-02-12` - `2024-05-12`	3 months	crt.sh
sni.cloudflaressl.com Cloudflare Inc ECC CA-3	`2023-05-12` - `2024-05-11`	a year	crt.sh

This page contains 1 frames:

Primary Page: https://usaco.org/
Frame ID: A5632F189E8D39C41F9965A3636F4E49
Requests: 17 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Page Title

USACO

Page URL History Show full URLs

http://usaco.org/ HTTP 301
https://usaco.org/ Page URL

Detected technologies

MathJax (JavaScript Graphics) Expand

Overall confidence: 100%
Detected patterns

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

jQuery (JavaScript Libraries) Expand

Overall confidence: 100%
Detected patterns

jquery.*\.js(?:\?ver(?:sion)?=([\d.]+))?

Page Statistics

17
Requests

100 %
HTTPS

0 %
IPv6

3
Domains

3
Subdomains

3
IPs

2
Countries

479 kB
Transfer

855 kB
Size

1
Cookies

9 Outgoing links

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

URL: https://www.ioinformatics.org/
Title: International Olympiad in Informatics (IOI)

Search URL Search Domain Scan URL

URL: https://www.citadel.com/

Search URL Search Domain Scan URL

URL: https://www.twosigma.com/

Search URL Search Domain Scan URL

URL: https://www.deshaw.com/

Search URL Search Domain Scan URL

URL: https://www.ansatzcapital.com/

Search URL Search Domain Scan URL

URL: https://x-camp.academy/#/

Search URL Search Domain Scan URL

URL: https://easyfuncoding.com/

Search URL Search Domain Scan URL

URL: https://vplanetcoding.com/

Search URL Search Domain Scan URL

URL: https://www.clemson.edu/
Title: Clemson University

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://usaco.org/ HTTP 301
https://usaco.org/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

17 HTTP transactions
0 data transactions

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

GET
H2

200

Primary Request / Show response
usaco.org/
Redirect Chain

http://usaco.org/
https://usaco.org/

10 KB
4 KB

541ms
206ms

Document
text/html

188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: a6690f69e8d6a0e16f4215cbf1911fb487e21614c0dc5d124d2cb54960be2a08

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: nl-NL,nl;q=0.9

Response headers

alt-svc: h3=":443"; ma=86400
cache-control: no-store, no-cache, must-revalidate
cf-cache-status: DYNAMIC
cf-ray: 8557001e4dfc7752-AMS
content-encoding: br
content-type: text/html; charset=UTF-8
date: Wed, 14 Feb 2024 17:23:42 GMT
expires: Thu, 19 Nov 1981 08:52:00 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
pragma: no-cache
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=%2FMTtnFBzLqdxvcwLg7TX0MNO4JbMCAGD4R4U2RuF%2FBXzagkvlPX2Xj7%2FsPANDgeuEZ5v5Cib38XVxOZqvrXa23Rk%2F9afQqbKHO06Z%2Fs4A39uoaDYnu4V%2Fwij1ns%3D"}],"group":"cf-nel","max_age":604800}
server: cloudflare
vary: Accept-Encoding

Redirect headers

CF-RAY: 8557001c0ea81af8-AMS
Cache-Control: max-age=3600
Connection: keep-alive
Date: Wed, 14 Feb 2024 17:23:42 GMT
Expires: Wed, 14 Feb 2024 18:23:42 GMT
Location: https://usaco.org/
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=ykBtjunKNn%2F88EW8n7Q9DVoiqpTGuO6P78RGR0GlTzuvPrQrQvcTrm%2B1teww%2FzWj0jTMoLk9s9vGkXCJnh6YJFi0bqCAL5TkBeu%2FoPO%2FSRF4Ah3NYPNJ7Fc3R2o%3D"}],"group":"cf-nel","max_age":604800}
Server: cloudflare
Transfer-Encoding: chunked
Vary: Accept-Encoding
alt-svc: h3=":443"; ma=86400

GET
H2 200 usaco.css
usaco.org/current/ 5 KB
2 KB 21ms
20ms Stylesheet
text/css 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL: https://usaco.org/current/usaco.css
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: c2296e8794ff8bb0ceaf2fcf518514f304449a32b563711aac61a71ed897be07

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:42 GMT
content-encoding: br
cf-cache-status: HIT
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
age: 5692
etag: W/"12af-6112f5ec9f401-gzip"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=%2BRmTPaTeUAkA50eaJVRjlxNK1%2B24cqDXsjQKg%2BDQKUB40xvHgOU8SeU%2BZwfQIkc84VPRtD2KGMTpECTYoFqiR42QZAotz7B1TSo8W%2F3JkKLXkJOWMlX5dF1v%2Bns%3D"}],"group":"cf-nel","max_age":604800}
content-type: text/css
cache-control: max-age=14400
cf-ray: 85570020a9877752-AMS
alt-svc: h3=":443"; ma=86400

GET
H2 200 jquery.min.js Show response
usaco.org/current/js/ 83 KB
30 KB 30ms
29ms Script
text/javascript 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL: https://usaco.org/current/js/jquery.min.js
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 764b9e9f3ad386aaa5cdeae9368353994de61c0bede087c8f7e3579cb443de3b

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:42 GMT
content-encoding: br
cf-cache-status: HIT
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
age: 5692
etag: W/"14d0c-6112f5ec9e461-gzip"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=V9eMhHcxU9QbEZnYHRmDZTN9GgBhVyMx9ut%2FLpSzB%2BEtTcIgNzAkfm42OM5D%2BzAet%2Bo%2F2nnTIsy1UV3s3uewB5PXHBdVly6s2xtiVnkYupTvE13SbpCZFSHa%2Fu8%3D"}],"group":"cf-nel","max_age":604800}
content-type: text/javascript
cache-control: max-age=14400
cf-ray: 85570020a9897752-AMS
alt-svc: h3=":443"; ma=86400

GET
H2 200 d3.v3.min.js Show response
d3js.org/ 148 KB
54 KB 384ms
35ms Script
application/javascript 104.26.6.30
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL: https://d3js.org/d3.v3.min.js
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 104.26.6.30 -, , ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 76c39718d1c0a3fb321676b3b7e29306c0907919a5716d5728bd1b08ae0169e7

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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

x-proxy-cache: HIT
date: Wed, 14 Feb 2024 17:23:43 GMT
content-encoding: br
cf-cache-status: HIT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
age: 472
last-modified: Mon, 29 Jan 2024 16:32:52 GMT
server: cloudflare
x-github-request-id: D05C:7068:24BB0A4:32FFEF3:65B7D4D2
etag: W/"65b7d334-250ad"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=rgM6CpsCJjNEfxfEfSMHCY6Tt8hIwqT9VyALy4hzeDgCQMmtVD3vGyXsiX1etAZ3gZPSQS6mpNBcvPs9aITeBJQZmlNcv8V7AcYljeklDWv5a8HnpOgpLfKc"}],"group":"cf-nel","max_age":604800}
content-type: application/javascript; charset=utf-8
access-control-allow-origin: *
cache-control: max-age=14400
cf-ray: 85570022dd93b88e-AMS
expires: Wed, 14 Feb 2024 16:10:03 GMT

GET
H2 200 MathJax.js Show response
cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/ 62 KB
17 KB 352ms
22ms Script
application/javascript 104.17.24.14
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML

Requested by

Host: usaco.org
URL: https://usaco.org/

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

104.17.24.14 -, , ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

48344fd55558bbeb600062a175d052979f9ece87c7299788f8ecf16a46c87bf6

Security Headers

Name	Value
Strict-Transport-Security	max-age=15780000
X-Content-Type-Options	nosniff

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
content-encoding: br
x-content-type-options: nosniff
cf-cache-status: HIT
nel: {"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
strict-transport-security: max-age=15780000
age: 590344
cross-origin-resource-policy: cross-origin
alt-svc: h3=":443"; ma=86400
content-length: 16870
last-modified: Tue, 01 Aug 2023 18:09:52 GMT
server: cloudflare
cf-cdnjs-via: cfworker/kv
etag: "64c94a70-41e6"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=Y6RS%2FLe85Puf%2BWCT7G8Ughcgf97kKRTvBAAAvvFcim38bvEdu%2B%2BR0FwLQV9bz501iRi12UUWg07W1cJmwIkQ798AISTCh5dlCqWDkNiHikuhaEdi0KNWn8cb4%2FQ0hdorJe10ubug"}],"group":"cf-nel","max_age":604800}
content-type: application/javascript; charset=utf-8
access-control-allow-origin: *
cache-control: public, max-age=30672000
accept-ranges: bytes
timing-allow-origin: *
cf-ray: 85570022bdc47754-AMS
expires: Mon, 03 Feb 2025 17:23:43 GMT

GET
H2 200 usaco_logo.png
usaco.org/current/images/ 35 KB
35 KB 22ms
22ms Image
image/png 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/usaco_logo.png
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: cbd1e794b7b3f7fdda2e40a76978cd7614b6366507f2068451725421e0c205f9

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:42 GMT
cf-cache-status: HIT
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
age: 5692
etag: "8c25-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=mbwBQEeJwWK7R2FkEPuAj%2FKY5SV34f1vSLN1B7VsXsw2BwTQgSpArIsS6lIm0m7qK0jOiFximLT2zsQ0SmCfBAXRH48b8Zh1XjAV9DehayvtE3jfA0zqcBW%2BiZc%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/png
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 85570020a98b7752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 35877

GET
H2 200 usa_team_2023.jpg
usaco.org/current/images/current_news/ 46 KB
47 KB 204ms
204ms Image
image/jpeg 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/current_news/usa_team_2023.jpg
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 43556ab86be5dfb4f45be880b6099f01d00b9b6138866b1f7121e96974fdb796

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "b9bf-6112f5ec9e461"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=s1jWiBhkVHrYZTYzjCOYdLn2ffJ69cci%2F9gCuGS%2F9NqovLEHfQXdPQOVBuPYoqZEA432vKUHRii3JxROsasSlzC6SR5RhLBq7Zx31ME1XiGascpU83S5U396RaY%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/jpeg
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 85570020a98f7752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 47551

GET
H2 200 egoi_team_2023.jpg
usaco.org/current/images/current_news/ 122 KB
122 KB 202ms
202ms Image
image/jpeg 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/current_news/egoi_team_2023.jpg
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 8434fb85b8fce7bafbd7b6ce6a2d4a70975387d0c58bdfff6984d74b3bc36d9c

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "1e76f-6112f5ec9e461"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=5skAxZCCXNwSTNKzCNh6sLnUB3IR68xa2A6xnuhrsaflNByDio6NfJ3GM4uW7juK5DrLHMg4Pk0O42oNxvdFjDeiPBffAD1iNBUG70qv303oZtm25QHrWOkUQfs%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/jpeg
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 85570020c9bd7752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 124783

GET
H2 200 logo_citadel.png
usaco.org/current/images/sponsors/ 22 KB
22 KB 202ms
202ms Image
image/png 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_citadel.png
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 1a5738974ac2948dca59658b90099e3deba4dbd1d680571dc53b7f6bdbed2918

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "56c7-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=%2BDWz%2BwndYfc01ODrrOjdXsTWe2BfO57Aj342r9NfAOoJiOOvxKZZYoVVWxZD05WVYdrVZMQ3KBwdexH8JJ6Bem8BZJfRZ35ZqkuzmBfjKleWf83WUYb3SAcmRd4%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/png
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 85570021ebe77752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 22215

GET
H2 200 logo_twosigma_new.png
usaco.org/current/images/sponsors/ 3 KB
3 KB 200ms
199ms Image
image/png 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_twosigma_new.png
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 1dcc3430e1d4a00358cdfd8c3b3723d4484717104de0bc7bdcd527df1af1512f

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "a24-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=ZTbppvm0Lz89qY04EMR28PV%2FIqth2OaLIh1mVmhhfutsVLpFbQFHSv4NEgl37fLSuXkU2UAFkvaZQvqo5fqZLlfHV5N6wYgb4wWGtbKmlaV8%2FC9roBqr7v1O054%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/png
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 855700221c237752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 2596

GET
H2 200 logo_deshaw.png
usaco.org/current/images/sponsors/ 7 KB
8 KB 206ms
205ms Image
image/png 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_deshaw.png
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 7a1c3d196ed103424258661334d90a26f5ddf8d24c948116dc800d849f9217b8

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "1d14-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=o6QM1S7U9RbywJtGUlEb6CFwPc5e0kAcyzCte5B7QSXzM8PuZfRBboHwwVMyn7o%2BNzyLg%2Bps1uWMQjL3AsyStVpiv3yDidPWiZvcyuBS60PU73bo5xFeoEv8kWQ%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/png
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 855700231da47752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 7444

GET
H2 200 logo_ansatz.png
usaco.org/current/images/sponsors/ 21 KB
21 KB 204ms
203ms Image
image/png 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_ansatz.png
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 56ff6468faced161acdcb435a2e4fd6713de8769b92efa7719551978025d3c34

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "5448-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=b9rxA25Xv%2BlCLUR6ZyHOvDvYlUQn23QDj%2F19RVaAi3C2B%2FLbVSsdbNru2Fu0wG0evbK9Qn9S32bk9d9hRA3gSiFt3odfAzpuztlgq2XtWrz32UL72a7N5OvwTlc%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/png
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 855700231da57752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 21576

GET
H2 200 logo_xcamp.png
usaco.org/current/images/sponsors/ 15 KB
16 KB 411ms
410ms Image
image/png 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_xcamp.png
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 57703cdff3a1c6c51aa35594be78476570828629c37cc4c72b5dc24d7c4bd659

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "3d9e-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=9mOcIMfK4g20LDers3%2FAqNur4fX3fKhzDuiNdudxv6yPRl4uhw8KuD2%2Bqpv70owckMySa5qIa8O4wV%2BFUyHGpGBAGOrUa3iKrAjeMiZ1jpRouZzdyg9ySMaG3Dc%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/png
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 855700231da77752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 15774

GET
H2 200 logo_easyfuncoding.png
usaco.org/current/images/sponsors/ 19 KB
19 KB 1504ms
1503ms Image
image/png 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_easyfuncoding.png
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 8352c7433fea780346c061662f4aff8f57f465e084d1967ec3edb28d49d32046

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:44 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "4a47-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=7UsmDAwdP43chD1AOoovAzNcJIvnztDZrAc%2F7B76pQ5kXQmSBscyZ1RMugUyZll%2FVCQVrwAe0CAyX09i3B3fUH%2BySQKHBSABZT3REIGIwlPoXhWYGQrNm0dEPj8%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/png
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 855700231da87752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 19015

GET
H2 200 logo_vplanet.jpg
usaco.org/current/images/sponsors/ 13 KB
13 KB 1019ms
1018ms Image
image/jpeg 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_vplanet.jpg
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: ac353194d75f2b228845d90ab09c0be9b23ae053791f7f9db8935b4d71d408e7

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:44 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "326d-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=VqKkOr6CzorzmGkbOkMtEUn%2FryxTgrQdrHHI7bE6e1IRHfrybDy2n1qKugbCA2q6LTwCIlHn2R6Ru7xhWo32HtmM4fMjkcFxgHINe7%2BM1ZNyWtTdMQcFwtoq3J0%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/jpeg
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 855700231da97752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 12909

GET
H2 200 logo_clemson.jpg
usaco.org/current/images/sponsors/ 8 KB
8 KB 515ms
515ms Image
image/jpeg 188.114.96.3
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://usaco.org/current/images/sponsors/logo_clemson.jpg
Requested by: Host: usaco.org
URL: https://usaco.org/
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 188.114.96.3 Amsterdam, Netherlands, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software: cloudflare /
Resource Hash: 3881f68a82b43a3e163d7f69a37bb91e96f00da17f9b55aef7443f16bd6e04bb

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
cf-cache-status: REVALIDATED
last-modified: Mon, 12 Feb 2024 13:36:51 GMT
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
etag: "1e16-6112f5ec9d4c1"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=9VLvUEg87qtNdFwnqwy%2B37jx%2FPD%2Fa1hjwX1fXEKGgsBcTXUdQeRaKMIMan0ijDM1UWlIi%2F485u68lrpI3GPKx8yMRQunPu9HmdtwjMHyiwStV8Xi7MlQtFrno8I%3D"}],"group":"cf-nel","max_age":604800}
content-type: image/jpeg
cache-control: max-age=14400
accept-ranges: bytes
cf-ray: 855700231dac7752-AMS
alt-svc: h3=":443"; ma=86400
content-length: 7702

GET
H2 200 TeX-AMS-MML_HTMLorMML.js Show response
cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/config/ 238 KB
59 KB 22ms
21ms Script
application/javascript 104.17.24.14
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/config/TeX-AMS-MML_HTMLorMML.js?V=2.7.1

Requested by

Host: cdnjs.cloudflare.com
URL: https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

104.17.24.14 -, , ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

8df260b35bb9f49c0d937fcbf0ec13fb661b0d281528aec977aee6a8c3f83688

Security Headers

Name	Value
Strict-Transport-Security	max-age=15780000
X-Content-Type-Options	nosniff

Request headers

accept-language: nl-NL,nl;q=0.9
Referer: https://usaco.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 17:23:43 GMT
content-encoding: br
x-content-type-options: nosniff
cf-cache-status: HIT
nel: {"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
strict-transport-security: max-age=15780000
age: 9197911
cross-origin-resource-policy: cross-origin
alt-svc: h3=":443"; ma=86400
content-length: 60091
last-modified: Tue, 01 Aug 2023 18:09:52 GMT
server: cloudflare
cf-cdnjs-via: cfworker/kv
etag: "64c94a70-eabb"
vary: Accept-Encoding
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=XIRouaKC4KaB037AZtm6Xl3INlOwyylSeQKjrWG1%2FTJKflKwwwq8hpNc6tmX3l%2BH9cg4VYtOoC7rSF%2BCnc31iNVgaC91laauT0bLPvkpIQ9YITSmGNchJBQ66Vh9hhZy1fglpSZE"}],"group":"cf-nel","max_age":604800}
content-type: application/javascript; charset=utf-8
access-control-allow-origin: *
cache-control: public, max-age=30672000
accept-ranges: bytes
timing-allow-origin: *
cf-ray: 855700231e467754-AMS
expires: Mon, 03 Feb 2025 17:23:43 GMT

Verdicts & Comments Add Verdict or Comment

5 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.

1 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
			usaco.org/	1969-12-31 23:59:59	Name: PHPSESSID Value: et9c3fkndib01bh0l7ph5ehq7i

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.

cdnjs.cloudflare.com
d3js.org
usaco.org
104.17.24.14
104.26.6.30
188.114.96.3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usaco.org Open in urlscan Pro 188.114.96.3 Public Scan

Summary

urlscan.io Verdict: No classification

Domain & IP information

Screenshot Live screenshot Full Image

Page Title

Page URL History Show full URLs

Detected technologies

Page Statistics

17 Requests

100 %HTTPS

0 %IPv6

3 Domains

3 Subdomains

3 IPs

2 Countries

479 kBTransfer

855 kBSize

1 Cookies

9 Outgoing links

Page URL History

Redirected requests

17 HTTP transactions Everything HTML Script AJAX CSS Image Expand all 0 data transactions

Request headers

Response headers

Redirect headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Verdicts & Comments Add Verdict or Comment

5 JavaScript Global Variables

1 Cookies

Indicators

usaco.org Open in urlscan Pro
188.114.96.3 Public Scan

Screenshot
Live screenshot

Full Image

17
Requests

100 %
HTTPS

0 %
IPv6

3
Domains

3
Subdomains

3
IPs

2
Countries

479 kB
Transfer

855 kB
Size

1
Cookies

17 HTTP transactions
0 data transactions