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usaco.org Open in urlscan Pro
2a06:98c1:3120::3  Public Scan

Go To Rescan Add Verdict Report
Submitted URL: http://usaco.org/
Effective URL: https://usaco.org/
Submission: On March 19 via api from US — Scanned from NL
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 3 IPs in 1 countries across 3 domains to perform 19 HTTP transactions. The main IP is 2a06:98c1:3120::3, located in United States and belongs to CLOUDFLARENET, US. The main domain is usaco.org.
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 1 2a06:98c1:312... 13335 (CLOUDFLAR...)
1 17 2a06:98c1:312... 13335 (CLOUDFLAR...)
1 2606:4700:20:... 13335 (CLOUDFLAR...)
2 2606:4700::68... 13335 (CLOUDFLAR...)
19 3
Apex Domain
Subdomains		 Transfer
18 usaco.org
usaco.org
357 KB
2 cloudflare.com
cdnjs.cloudflare.com — Cisco Umbrella Rank: 387
76 KB
1 d3js.org
d3js.org — Cisco Umbrella Rank: 39146
54 KB
19 3
Domain Requested by
18 usaco.org 2 redirects usaco.org
2 cdnjs.cloudflare.com usaco.org
cdnjs.cloudflare.com
1 d3js.org usaco.org
19 3
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 2 frames:

Primary Page: https://usaco.org/
Frame ID: 33BAF60FA76AA3D0EAA043DF982CEA40
Requests: 17 HTTP requests in this frame

Frame: https://usaco.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/956dacbeead0/main.js
Frame ID: 7391BACDBAB0679EFD28D57E584AB2B9
Requests: 2 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

USACO

Page URL History Show full URLs

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

Detected technologies

Overall confidence: 100%
Detected patterns
  • ([\d.]+)?/mathjax\.js
Overall confidence: 100%
Detected patterns
  • jquery.*\.js(?:\?ver(?:sion)?=([\d.]+))?

Page Statistics

19
Requests

95 %
HTTPS

100 %
IPv6

3
Domains

3
Subdomains

3
IPs

1
Countries

486 kB
Transfer

865 kB
Size

2
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://usaco.org/ HTTP 301
    https://usaco.org/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

Request Chain 16
  • https://usaco.org/cdn-cgi/challenge-platform/scripts/jsd/main.js HTTP 302
  • https://usaco.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/956dacbeead0/main.js

19 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
Primary Request /
usaco.org/
Redirect Chain
  • http://usaco.org/
  • https://usaco.org/
11 KB
5 KB 		Document
General
Check archive.org
Download Go to
Full URL
https://usaco.org/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
e21c7e76bb38f03557d95249a014d465c65d716d7fa3b79e792e0bbfdd0aef9a

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 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
8669726a98736572-AMS
content-encoding
br
content-type
text/html; charset=UTF-8
date
Tue, 19 Mar 2024 00:46:42 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\/v4?s=xaSozcD7cdiaMJR3iTf9h0N%2BfqFGlANcH7X2NfPDw8050q8dABvPhvwBFz72R9cTS6XhbI11saPlckildir9n6sv%2BDQSviASylphWITxoy92LapmjE5cAgKTDnHD17cY%2BxK9gajex8k%3D"}],"group":"cf-nel","max_age":604800}
server
cloudflare
vary
Accept-Encoding

Redirect headers

CF-RAY
8669726a3f5166cd-AMS
Cache-Control
max-age=3600
Connection
keep-alive
Date
Tue, 19 Mar 2024 00:46:42 GMT
Expires
Tue, 19 Mar 2024 01:46:42 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\/v4?s=wLEQoipicPpM95hRBBSqEDGIuM8eOpCk6N2zkJg%2F6MTg3%2FJEhUk0V9fPukY%2FwsSI34PiejOyfTROAYDE93Z3j7qW1jGh9BiLA57tmhP0Iyi5U3mwEX8QeowxzGdWV7L7aZ5%2F3gRrxGE%3D"}],"group":"cf-nel","max_age":604800}
Server
cloudflare
Transfer-Encoding
chunked
Vary
Accept-Encoding
alt-svc
h3=":443"; ma=86400
usaco.css
usaco.org/current/ 		5 KB
2 KB 		Stylesheet
General
Check archive.org
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
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 GMT
content-encoding
br
cf-cache-status
HIT
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
age
3910
etag
W/"12af-613ac11fc3837-gzip"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=u1pDF2m8eFWm7vIJJxCFCDEb5SjrQi3wVhA89eD5NbL3KiJ3ZdCXQiDfcprrn68e2fWAde%2BRDRmJZcWu9u4iU2XCsoliYaGPmgiUnK7wdRIeqlDJFaOrryveZHm8zBPk6cYz1UAEopE%3D"}],"group":"cf-nel","max_age":604800}
content-type
text/css
cache-control
max-age=14400
cf-ray
8669726be92d6572-AMS
alt-svc
h3=":443"; ma=86400
jquery.min.js
usaco.org/current/js/ 		83 KB
30 KB 		Script
General
Check archive.org
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
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 GMT
content-encoding
br
cf-cache-status
HIT
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
age
3910
etag
W/"14d0c-613ac11fc3837-gzip"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=f6I7KhPYx%2Ff3FBlhGaD34e%2FsUHtzuHHt9V0OghCA2vMiPgFKujyQqnGDq4B29ahyEkr0kkZggCZHgO4v8W2m6T0X4%2BdkkL5WKUI5VpyKPyZYTaAucF87KtYtq%2FeWww0nABr5F1s2LyQ%3D"}],"group":"cf-nel","max_age":604800}
content-type
text/javascript
cache-control
max-age=14400
cf-ray
8669726be92e6572-AMS
alt-svc
h3=":443"; ma=86400
d3.v3.min.js
d3js.org/ 		148 KB
54 KB 		Script
General
Check archive.org
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
2606:4700:20::681a:61e , United States, 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/122.0.6261.128 Safari/537.36

Response headers

x-proxy-cache
REVALIDATED
date
Tue, 19 Mar 2024 00:46:42 GMT
content-encoding
br
cf-cache-status
HIT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
age
85
last-modified
Tue, 12 Mar 2024 22:22:31 GMT
server
cloudflare
x-github-request-id
B468:86CB:5DBC4C:711C34:65F1C726
etag
W/"65f0d5a7-250ad"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=VXpzCxIkr%2FfX0R3nS72hSkuImmxIr9uIYNFR8b8PRD876i%2BqDtMm7UlLId0LSYZr%2BG9rr8UlF0aNCPv%2FftYq2Y6I9TiAKRUy9mb1OVv2hIoJwhKxP%2B2znD6OU9nUz1zdfZaYNHXx"}],"group":"cf-nel","max_age":604800}
content-type
application/javascript; charset=utf-8
access-control-allow-origin
*
cache-control
max-age=14400
x-origin-cache
HIT
cf-ray
8669726c195f6708-AMS
expires
Tue, 19 Mar 2024 00:54:43 GMT
MathJax.js
cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/ 		62 KB
17 KB 		Script
General
Check archive.org
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
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6811:190e , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 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
449179
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\/v4?s=4uc5i4oM0SYqEblQWKUNrHL8lhsSf6S6PFS5tbaiWideTY4ymshShluEAumDKh4zMWWgpzJQcJRC11%2FetztIxhTrOK2UsxD2ODBlnERV%2Bi%2FLgijcSkTL5waDhZHK1g7MgISfnZPiS9vVNFYqB37J0i%2FC"}],"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
8669726c1e380eac-AMS
expires
Sun, 09 Mar 2025 00:46:42 GMT
usaco_logo.png
usaco.org/current/images/ 		35 KB
35 KB 		Image
General
Check archive.org
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
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 GMT
cf-cache-status
HIT
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
age
5337
etag
"8c25-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=k86UG1o02Dk7fWp8ivyUE%2Fbm9k1IoVcNDyZ2ja051vmC%2BAPswlf2b5aUdcqEUJpln%2FJswKTpf1cDHJKQMcEkvVpsaEufyRb1%2Bu9MyK3QUxHGmnI53nqQldb8uSahzwXojOzlSF%2B2fyU%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726be9306572-AMS
alt-svc
h3=":443"; ma=86400
content-length
35877
usa_team_2023.jpg
usaco.org/current/images/current_news/ 		46 KB
47 KB 		Image
General
Check archive.org
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
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 GMT
cf-cache-status
MISS
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"b9bf-613ac11fc2897"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=P0ofUSVkpVxBLaMFxBun0Qc340lrGwgGO9DEZ4cs0F8fHK9M2HS%2B5UC2tSRncMeBgJ0K%2FoDUo%2FjPsYIXdjr6a3vNYrfZqqzQ0zrouVISGdbLLJz3m6Bi8sApmdiUVTgU4U7PeEc6vg0%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/jpeg
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726be9316572-AMS
alt-svc
h3=":443"; ma=86400
content-length
47551
egoi_team_2023.jpg
usaco.org/current/images/current_news/ 		122 KB
122 KB 		Image
General
Check archive.org
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
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"1e76f-613ac11fc2897"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=SwFz7uoNTsov9%2BSu2zDespE3k5emOd0zoPgHnB0VBDELWnGnJ%2BTzH4Dv6RrDOxZ3mrZ86sYDN3y1w8XZf9pNWEqxbdDaA8VjUD2sYynkoEzeiz%2B07VJJThR07dtFFiyFKYkhWMllmT4%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/jpeg
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c09506572-AMS
alt-svc
h3=":443"; ma=86400
content-length
124783
logo_citadel.png
usaco.org/current/images/sponsors/ 		22 KB
22 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:43 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"56c7-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=ufgotoTjSYTmlibQOPpLWHbkf3X9EfNYRK2gG4j%2FMQE8fH69RSjOWv3KDxjcZdJCwIiwpWtPK7ieOBQxaHWp%2BnB76PLsOLqZTuHuoxe4bmeFuOM%2FzSt1xp5lh5iKI8hk0NFrHb4xNAc%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5ec56632-AMS
alt-svc
h3=":443"; ma=86400
content-length
22215
logo_twosigma_new.png
usaco.org/current/images/sponsors/ 		3 KB
3 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:43 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"a24-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=KkpcW6V1NPzpx3uziPThbEN8x9Nz1gdoqLKtR3gh77HGZEkHUZTVAuEBrUImobPlb5gbZXIK%2FqsQGRz2s6rxmOS9eUIAOgdIqAvuqzZVCiE%2BHvx1XILp3%2FHBmOrAW53HFkjDPS3NNpY%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5ec66632-AMS
alt-svc
h3=":443"; ma=86400
content-length
2596
logo_deshaw.png
usaco.org/current/images/sponsors/ 		7 KB
8 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:44 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"1d14-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=FR87cG7d9UNn2q5RuzvMEAHwrFr0bbdcq7YNx7%2Ft%2F%2Fn1Xm9lgB%2BCDEbyzeb4PCXoCTGLQ1%2BPxU1RgcrMFuAyS2W%2B7XJLfSu3ipfueVwtwiSrEqmhlbpbt%2Fy8Uexst5CYs3vwUlTlbOw%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5ec76632-AMS
alt-svc
h3=":443"; ma=86400
content-length
7444
logo_ansatz.png
usaco.org/current/images/sponsors/ 		21 KB
22 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"5448-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=LbtT%2FhOuKchlUlAwaoyX7mxXBP8Fvj1oLkFiBLYgk1FDPyG%2FG0cLthdz9cjqC7QKfhozNm2zBOpupVo8UadZa1q4vyogwCnMKlQvgyvYfkBUQKd0jPJwGzMo%2B%2Fy0x88WC0%2BPpWvWaaw%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5ec86632-AMS
alt-svc
h3=":443"; ma=86400
content-length
21576
logo_xcamp.png
usaco.org/current/images/sponsors/ 		15 KB
16 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:43 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"3d9e-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=t2GZCjVSp6CtmfdqDh%2BwG7xBHZTmLwdwqgjNLzeYhQ%2F4meSTE64eU6CSgZ4D38qV6JBO5eajmCw%2BCMBquw5kv3tOIT%2FW%2BVGaEga3kebry1fM70UtJFXTrTpOzw443%2BUJfcrqQ1V9ujk%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5ec96632-AMS
alt-svc
h3=":443"; ma=86400
content-length
15774
logo_easyfuncoding.png
usaco.org/current/images/sponsors/ 		19 KB
19 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:43 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"4a47-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=eJR2BYDXRS7ZCyL5i0OAGgbjlh1MQXdAWW3eN2fQzmI7R3075HCeQE0kQ7fFGz7OBNx4f0byg%2Ba0cXh7KPJWjFPfSORyemxZITVUy%2FuOXOQWze7l0m7T8%2FA6G6tf4%2BAVE6HB5vnP5Ps%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5eca6632-AMS
alt-svc
h3=":443"; ma=86400
content-length
19015
logo_vplanet.jpg
usaco.org/current/images/sponsors/ 		13 KB
13 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:43 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"326d-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=AHZLaFupNhpnngHeMhn7eHFUDIS5iR2NEV6Cw3Zfjxdjavuz%2FaEmJmUZRD9rb5biJ2QoubsErQHh42Tvuz7zNAUWmgCfCjYDfzWzUxWpXg9dQ2ohNXpD1SD2eiaRHQmntF2clgUqL8A%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/jpeg
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5ecc6632-AMS
alt-svc
h3=":443"; ma=86400
content-length
12909
logo_clemson.jpg
usaco.org/current/images/sponsors/ 		8 KB
8 KB 		Image
General
Check archive.org
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
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:44 GMT
cf-cache-status
REVALIDATED
last-modified
Fri, 15 Mar 2024 05:13:37 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"1e16-613ac11fc18f7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=w25gd7rzEWtFYem7i29PFRRSXwbqpFQ%2F4GMm8Yy%2Bmuu%2FM0WIgzbXhhVGA%2BEKw6GB3sG%2FVpiPt9fdWXk6ho2adk7Exv7fJnks%2BhXhZ1azvtoDFHKikV9xB%2B%2F78pn%2Fwm8RMgLJgmQtPVE%3D"}],"group":"cf-nel","max_age":604800}
content-type
image/jpeg
cache-control
max-age=14400
accept-ranges
bytes
cf-ray
8669726c5ecd6632-AMS
alt-svc
h3=":443"; ma=86400
content-length
7702
TeX-AMS-MML_HTMLorMML.js
cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/config/ 		238 KB
59 KB 		Script
General
Check archive.org
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
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6811:190e , United States, 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/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 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
451521
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\/v4?s=3NC9Lh5IH1KIRyfWmpoVh0wMk6Z1wT4QSjzjJJoH7FYTBrXtB7aYDzigQIv5GcymRn3N0kYkvPogjrB7NnA3vDQVUmEh3VV1X5thU5lOjcy2EJ4iyl3LHUIR14dYV34%2FA6vsdjzyW86UNYitHTV0pYa7"}],"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
8669726c5e680eac-AMS
expires
Sun, 09 Mar 2025 00:46:42 GMT
main.js
usaco.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/956dacbeead0/ Frame 7391
Redirect Chain
  • https://usaco.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
  • https://usaco.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/956dacbeead0/main.js
8 KB
4 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://usaco.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/956dacbeead0/main.js
Requested by
Host: usaco.org
URL: https://usaco.org/
Protocol
H3
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
c6eff2cbd774ef366086771f7405b10fb7ebd85a035f2a456fab999e12ba871e
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

accept-language
nl-NL,nl;q=0.9
Referer
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Tue, 19 Mar 2024 00:46:42 GMT
content-encoding
br
x-content-type-options
nosniff
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
vary
accept-encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=YZZlIUtNoZhn8Y06cxMG19topsDiFcNeBIuzaPYfCaSgcUZGmMdEChLQi9pnhiGB%2B8JG%2FjAqJ7oy68GXJt6JVdauoe5TyM58ZqQ7Ts%2Fk7NghuvQVjbEnybbAiXLdN0u2UoUOF3RcUYI%3D"}],"group":"cf-nel","max_age":604800}
content-type
application/javascript; charset=UTF-8
cache-control
max-age=14400, public
cf-ray
8669726c9eef6632-AMS
alt-svc
h3=":443"; ma=86400

Redirect headers

date
Tue, 19 Mar 2024 00:46:42 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=EnCX2zhVdiWYWtnOCcBDngGZnyimMzwATPdwybAtYqE1ReSlEAKUGTaTRuDqjIeDv3IK9gTIs2sgCA5UsqRZBjS574mjzyl0a2sZpy%2FIeielCvA%2BF6JKiObeJje4r2IiCfclhNfNM48%3D"}],"group":"cf-nel","max_age":604800}
access-control-allow-origin
*
location
/cdn-cgi/challenge-platform/h/g/scripts/jsd/956dacbeead0/main.js
cache-control
max-age=300, public
cf-ray
8669726c7ee26632-AMS
alt-svc
h3=":443"; ma=86400
content-length
0
8669726a98736572
usaco.org/cdn-cgi/challenge-platform/h/g/jsd/r/ Frame 7391 		0
592 B 		XHR
General
Check archive.org
Download Go to
Full URL
https://usaco.org/cdn-cgi/challenge-platform/h/g/jsd/r/8669726a98736572
Requested by
Host: usaco.org
URL: https://usaco.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Request headers

Referer
accept-language
nl-NL,nl;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36
Content-Type
application/json

Response headers

date
Tue, 19 Mar 2024 00:46:43 GMT
content-encoding
br
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=HbagVVGnwUovP4Rw%2FFByH5PElVVvYJ7Z6TPe%2BCl73wxgHFPOyMtchVm%2BIAyk58sf8MCXjaqEy6G%2FCdrVvBZ8KQqCmWUazyd7yadIycu99ldhqTruidRj3PEwIjQf22M3diL6NKbGphQ%3D"}],"group":"cf-nel","max_age":604800}
content-type
text/plain; charset=UTF-8
cf-ray
8669726d1f336632-AMS
alt-svc
h3=":443"; ma=86400

Verdicts & Comments Add Verdict or Comment

6 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.

object| 0 function| $ function| jQuery object| d3 object| MathJax undefined| module

2 Cookies

Domain/Path Name / Value
usaco.org/ Name: PHPSESSID
Value: tp286qr5v22f3ncbkd2oeb6393
.usaco.org/ Name: cf_clearance
Value: QNmWCHy5YjnQsD0Vceq5tExAxpt7s6o68kM.hquilUg-1710809203-1.0.1.1-6_eVAi7QgWiJnQg_EJrLODK9VQ3AEc_09tDDeXJXy91zGyQobUkMsv9TJTlN1AfqfWiVjpuHhlEjLhk2R1EjEA

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
2606:4700:20::681a:61e
2606:4700::6811:190e
2a06:98c1:3120::3
2a06:98c1:3121::3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