www.falstad.com - urlscan.io

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 941540.
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 45.43.3.15	397423 (TIER-NET) (TIER-NET)
1 1	63.251.163.239 63.251.163.239	14744 (INTERNAP-...) (INTERNAP-BLOCK-4)
1	63.251.163.214 63.251.163.214	14744 (INTERNAP-...) (INTERNAP-BLOCK-4)
7	2

6 45.43.3.15 (Dallas, United States)

ASN397423 (TIER-NET, US)
PTR: ln15.myplesk.cc

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

1 63.251.163.239 (United States) 1 redirects

ASN14744 (INTERNAP-BLOCK-4, US)

img.groundspeak.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 63.251.163.214 (United States)

ASN14744 (INTERNAP-BLOCK-4, US)
PTR: img.geocaching.com

img.geocaching.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

	Apex Domain Subdomains	Transfer
6	falstad.com www.falstad.com — Cisco Umbrella Rank: 941540	107 KB
1	geocaching.com img.geocaching.com — Cisco Umbrella Rank: 297196	7 KB
1	groundspeak.com 1 redirects 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: 41B59AC9179050C7BD9FE6ED6C21DE4B
Requests: 7 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Page Title

Paul Falstad

Page URL History Show full URLs

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

2 Outgoing links

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

URL: http://www.geocaching.com/profile/?guid=ec0bad6f-f419-4f0a-af3d-fdb4ee805a9e

Search URL Search Domain Scan URL

URL: https://play.google.com/store/apps/details?id=com.falstad.megaphotofree
Title: Mega Photo for Android

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://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
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
www.falstad.com/
Redirect Chain

http://www.falstad.com/
https://www.falstad.com/

1 KB
586 B

551ms
179ms

Document
text/html

45.43.3.15
TIER-NET

General

Check archive.org

Show headers 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: pt-PT,pt;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/123.0.0.0 Safari/537.36

Response headers

content-encoding: br
content-type: text/html
date: Thu, 11 Apr 2024 10:36:45 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

GET
H2 200 maze_small.gif
www.falstad.com/ 20 KB
20 KB 315ms
314ms Image
image/gif 45.43.3.15
TIER-NET

General

Check archive.org

Show headers 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="123", "Not:A-Brand";v="8", "Chromium";v="123"
Referer: https://www.falstad.com/
Accept-Language: pt-PT,pt;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/123.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

date: Thu, 11 Apr 2024 10:36:45 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

GET
H2 200 loadedstring_small.gif
www.falstad.com/ 10 KB
10 KB 330ms
329ms Image
image/gif 45.43.3.15
TIER-NET

General

Check archive.org

Show headers 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="123", "Not:A-Brand";v="8", "Chromium";v="123"
Referer: https://www.falstad.com/
Accept-Language: pt-PT,pt;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/123.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

date: Thu, 11 Apr 2024 10:36:45 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

GET
H2 200 membrane_small.gif
www.falstad.com/ 64 KB
64 KB 443ms
441ms Image
image/gif 45.43.3.15
TIER-NET

General

Check archive.org

Show headers 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="123", "Not:A-Brand";v="8", "Chromium";v="123"
Referer: https://www.falstad.com/
Accept-Language: pt-PT,pt;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/123.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

date: Thu, 11 Apr 2024 10:36:45 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

GET
H2 200 ripple_small.gif
www.falstad.com/ 10 KB
10 KB 326ms
326ms Image
image/gif 45.43.3.15
TIER-NET

General

Check archive.org

Show headers 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="123", "Not:A-Brand";v="8", "Chromium";v="123"
Referer: https://www.falstad.com/
Accept-Language: pt-PT,pt;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/123.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

date: Thu, 11 Apr 2024 10:36:45 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

GET
H/1.1

200
OK

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

904ms
228ms

Image
image/png

63.251.163.214
INTERNAP-BLOCK-4

General

Check archive.org

Show headers 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

ced3ae55216f10a0555d835923941eb34419862296b75d1a86b9a02e0a17ce4e

Security Headers

Name	Value
X-Content-Type-Options	nosniff
X-Frame-Options	SAMEORIGIN
X-Xss-Protection	1

Request headers

Accept-Language: pt-PT,pt;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/123.0.0.0 Safari/537.36

Response headers

Pragma: no-cache
Date: Thu, 11 Apr 2024 10:36:46 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: 7104
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

GET
H2 200 favicon.ico
www.falstad.com/ 1 KB
2 KB 179ms
179ms Other
image/vnd.microsoft.icon 45.43.3.15
TIER-NET

General

Check archive.org

Show headers 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="123", "Not:A-Brand";v="8", "Chromium";v="123"
Referer: https://www.falstad.com/
Accept-Language: pt-PT,pt;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/123.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

date: Thu, 11 Apr 2024 10:36:47 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

0 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.

0 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.

2 Console Messages

A page may trigger messages to the console to be logged. These are often error messages about being unable to load a resource or execute a piece of JavaScript. Sometimes they also provide insight into the technology behind a website.

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

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.

img.geocaching.com
img.groundspeak.com
www.falstad.com
45.43.3.15
63.251.163.214
63.251.163.239
20013c55b7028d462bfd07d9299d7414bf55f3a016f1242637fd17f2b16609cb
85bf3a5d6b35a4e347fe4b85c0a7ae9578f16a5acfb6451fb5cfd87ab4b9317c
90c6c18610aee1e4b233971e806798f34fc1e9751458309de8ce0ff422672119
a5ee9376d018b6677fc44a28497ebce8d91d059d6e675559a26c37b936efa8ab
b7ab2eb0746c47b59946955a599b36d249d25639d39566af535d541e34c7564e
ced3ae55216f10a0555d835923941eb34419862296b75d1a86b9a02e0a17ce4e
dee958e2c3d1f841aa9c7da7fc3d995cd9b31c454a8efb0119c456fe312ed40f

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

Summary

urlscan.io Verdict: No classification

Domain & IP information

Screenshot Live screenshot Full Image

Page Title

Page URL History Show full URLs

Page Statistics

7 Requests

86 %HTTPS

0 %IPv6

3 Domains

3 Subdomains

2 IPs

1 Countries

114 kBTransfer

114 kBSize

0 Cookies

2 Outgoing links

Page URL History

Redirected requests

7 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

Redirect headers

Request headers

Response headers

Verdicts & Comments Add Verdict or Comment

0 JavaScript Global Variables

0 Cookies

2 Console Messages

Indicators

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

Screenshot
Live screenshot

Full Image

7
Requests

86 %
HTTPS

0 %
IPv6

3
Domains

3
Subdomains

2
IPs

1
Countries

114 kB
Transfer

114 kB
Size

0
Cookies

7 HTTP transactions
0 data transactions