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www.falstad.com Open in urlscan Pro
45.43.3.15  Public Scan

Go To Rescan Add Verdict Report
Submitted URL: http://www.falstad.com/
Effective URL: https://www.falstad.com/
Submission: On June 18 via api from US — Scanned from DE
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 2 IPs in 1 countries across 3 domains to perform 7 HTTP transactions. The main IP is 45.43.3.15, located in Dallas, United States and belongs to TIER-NET, US. The main domain is www.falstad.com. The Cisco Umbrella rank of the primary domain is 826442.
TLS certificate: Issued by Sectigo RSA Domain Validation Secure ... on April 6th 2024. Valid for: a year.
This is the only time www.falstad.com was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
6 45.43.3.15 397423 (TIER-NET)
1 1 63.251.163.239 14744 (INTERNAP-...)
1 63.251.163.214 14744 (INTERNAP-...)
7 2
Apex Domain
Subdomains		 Transfer
6 falstad.com
www.falstad.com — Cisco Umbrella Rank: 826442
107 KB
1 geocaching.com
img.geocaching.com — Cisco Umbrella Rank: 260209
7 KB
1 groundspeak.com
img.groundspeak.com
210 B
7 3
Domain Requested by
6 www.falstad.com www.falstad.com
1 img.geocaching.com www.falstad.com
1 img.groundspeak.com 1 redirects
7 3

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

Domain
www.geocaching.com
play.google.com
Subject Issuer Validity Valid
www.falstad.com
Sectigo RSA Domain Validation Secure Server CA		 2024-04-06 -
2025-04-30		 a year crt.sh

This page contains 1 frames:

Primary Page: https://www.falstad.com/
Frame ID: 886C4D4BB890DFE00837C314F13454AC
Requests: 7 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

Paul Falstad

Page URL History Show full URLs

  1. http://www.falstad.com/ HTTP 307
    https://www.falstad.com/ Page URL

Page Statistics

7
Requests

86 %
HTTPS

0 %
IPv6

3
Domains

3
Subdomains

2
IPs

1
Countries

114 kB
Transfer

114 kB
Size

0
Cookies

Page URL History

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

  1. http://www.falstad.com/ HTTP 307
    https://www.falstad.com/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

Request Chain 4
  • https://img.groundspeak.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1 HTTP 302
  • https://img.geocaching.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1

7 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
Primary Request /
www.falstad.com/
Redirect Chain
  • http://www.falstad.com/
  • https://www.falstad.com/
1 KB
586 B 		Document
General
Check archive.org
Download Go to
Full URL
https://www.falstad.com/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
45.43.3.15 Dallas, United States, ASN397423 (TIER-NET, US),
Reverse DNS
ln15.myplesk.cc
Software
nginx / PleskLin
Resource Hash
85bf3a5d6b35a4e347fe4b85c0a7ae9578f16a5acfb6451fb5cfd87ab4b9317c

Request headers

Accept-Language
de-DE,de;q=0.9;q=0.9
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

content-encoding
br
content-type
text/html
date
Tue, 18 Jun 2024 21:37:18 GMT
etag
W/"60bd9823-485"
last-modified
Mon, 07 Jun 2021 03:53:07 GMT
server
nginx
vary
Accept-Encoding
x-powered-by
PleskLin

Redirect headers

Location
https://www.falstad.com/
Non-Authoritative-Reason
HttpsUpgrades
maze_small.gif
www.falstad.com/ 		20 KB
20 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.falstad.com/maze_small.gif
Requested by
Host: www.falstad.com
URL: https://www.falstad.com/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
45.43.3.15 Dallas, United States, ASN397423 (TIER-NET, US),
Reverse DNS
ln15.myplesk.cc
Software
nginx / PleskLin
Resource Hash
dee958e2c3d1f841aa9c7da7fc3d995cd9b31c454a8efb0119c456fe312ed40f

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://www.falstad.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Tue, 18 Jun 2024 21:37:18 GMT
last-modified
Wed, 07 Feb 2007 04:59:11 GMT
server
nginx
etag
"45c95c9f-506b"
x-powered-by
PleskLin
content-type
image/gif
accept-ranges
bytes
content-length
20587
loadedstring_small.gif
www.falstad.com/ 		10 KB
10 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.falstad.com/loadedstring_small.gif
Requested by
Host: www.falstad.com
URL: https://www.falstad.com/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
45.43.3.15 Dallas, United States, ASN397423 (TIER-NET, US),
Reverse DNS
ln15.myplesk.cc
Software
nginx / PleskLin
Resource Hash
b7ab2eb0746c47b59946955a599b36d249d25639d39566af535d541e34c7564e

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://www.falstad.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Tue, 18 Jun 2024 21:37:18 GMT
last-modified
Wed, 07 Feb 2007 04:59:09 GMT
server
nginx
etag
"45c95c9d-2957"
x-powered-by
PleskLin
content-type
image/gif
accept-ranges
bytes
content-length
10583
membrane_small.gif
www.falstad.com/ 		64 KB
64 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.falstad.com/membrane_small.gif
Requested by
Host: www.falstad.com
URL: https://www.falstad.com/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
45.43.3.15 Dallas, United States, ASN397423 (TIER-NET, US),
Reverse DNS
ln15.myplesk.cc
Software
nginx / PleskLin
Resource Hash
20013c55b7028d462bfd07d9299d7414bf55f3a016f1242637fd17f2b16609cb

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://www.falstad.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Tue, 18 Jun 2024 21:37:18 GMT
last-modified
Wed, 07 Feb 2007 04:59:13 GMT
server
nginx
etag
"45c95ca1-ff49"
x-powered-by
PleskLin
content-type
image/gif
accept-ranges
bytes
content-length
65353
ripple_small.gif
www.falstad.com/ 		10 KB
10 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.falstad.com/ripple_small.gif
Requested by
Host: www.falstad.com
URL: https://www.falstad.com/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
45.43.3.15 Dallas, United States, ASN397423 (TIER-NET, US),
Reverse DNS
ln15.myplesk.cc
Software
nginx / PleskLin
Resource Hash
90c6c18610aee1e4b233971e806798f34fc1e9751458309de8ce0ff422672119

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://www.falstad.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Tue, 18 Jun 2024 21:37:18 GMT
last-modified
Wed, 07 Feb 2007 04:59:35 GMT
server
nginx
etag
"45c95cb7-28d3"
x-powered-by
PleskLin
content-type
image/gif
accept-ranges
bytes
content-length
10451
img.aspx
img.geocaching.com/stats/
Redirect Chain
  • https://img.groundspeak.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1
  • https://img.geocaching.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1
7 KB
7 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://img.geocaching.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1
Requested by
Host: www.falstad.com
URL: https://www.falstad.com/
Protocol
HTTP/1.1
Server
63.251.163.214 , United States, ASN14744 (INTERNAP-BLOCK-4, US),
Reverse DNS
img.geocaching.com
Software
/ ASP.NET
Resource Hash
98944d86466b45b69a85bec51736b443eb8612aa985eb65af5cbf8c2c83cc78b
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1

Request headers

Accept-Language
de-DE,de;q=0.9;q=0.9
Referer
https://www.falstad.com/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Response headers

Pragma
no-cache
Date
Tue, 18 Jun 2024 21:37:17 GMT
X-Content-Type-Options
nosniff
X-Powered-By
ASP.NET
X-Frame-Options
SAMEORIGIN
Content-Type
image/png
Cache-Control
no-cache
Content-Length
7112
X-XSS-Protection
1
Expires
-1

Redirect headers

Location
https://img.geocaching.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1
Server
BigIP
Connection
Keep-Alive
Content-Length
0
favicon.ico
www.falstad.com/ 		1 KB
2 KB 		Other
General
Check archive.org
Download Go to
Full URL
https://www.falstad.com/favicon.ico
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
45.43.3.15 Dallas, United States, ASN397423 (TIER-NET, US),
Reverse DNS
ln15.myplesk.cc
Software
nginx / PleskLin
Resource Hash
a5ee9376d018b6677fc44a28497ebce8d91d059d6e675559a26c37b936efa8ab

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://www.falstad.com/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Tue, 18 Jun 2024 21:37:19 GMT
last-modified
Wed, 07 Feb 2007 16:00:21 GMT
server
nginx
etag
"45c9f795-57e"
x-powered-by
PleskLin
content-type
image/vnd.microsoft.icon
accept-ranges
bytes
content-length
1406

Verdicts & Comments Add Verdict or Comment

3 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.

undefined| event object| fence object| sharedStorage

0 Cookies

2 Console Messages

Source Level URL
Text
security warning URL: https://www.falstad.com/
Message:
Mixed Content: The page at 'https://www.falstad.com/' was loaded over HTTPS, but requested an insecure element 'http://img.groundspeak.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1'. This request was automatically upgraded to HTTPS, For more information see https://blog.chromium.org/2019/10/no-more-mixed-messages-about-https.html
security warning URL: https://www.falstad.com/(Line 44)
Message:
Mixed Content: The page at 'https://www.falstad.com/' was loaded over HTTPS, but requested an insecure element 'http://img.groundspeak.com/stats/img.aspx?txt=geocaching.com&uid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e&bg=1'. This request was automatically upgraded to HTTPS, For more information see https://blog.chromium.org/2019/10/no-more-mixed-messages-about-https.html