usaco.org

Observed 2026-07-14T03:59:18.341Z (11h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Registered withRegister.com - Network Solutions, LLC

IPv6 · 95 subdomains · push_legacy

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat usaco.org actually stands on - every host below is a signed observation

usaco.org

A / AAAA

172.67.137.226104.21.78.2282606:4700:3033::6815:4ee42606:4700:3035::ac43:89e2

Cloudflareserves the site

aurora.ns.cloudflare.comandronicus.ns.cloudflare.com

cloudflare.comanswers its DNS

HTTPS probe

ok Responding normally (2xx) 200 OK

HTTP status200

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time265 ms

DNS resolutionNOERROR

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 2

172.67.137.226
104.21.78.228

AAAA 2

2606:4700:3033::6815:4ee4
2606:4700:3035::ac43:89e2

TXT 2

google-gws-recovery-domain-verification=49071871
v=spf1 ip4:130.127.0.0/16 a:clemson.edu ~all

NS 2

aurora.ns.cloudflare.com
andronicus.ns.cloudflare.com

SOA 1

andronicus.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (0)

None.

Subdomains (95)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for usaco.org. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/usaco.org">
  <img src="https://domaindrift.io/badge/usaco.org.svg"
       width="300" height="64" alt="DomainDrift signed observations for usaco.org">
</a>

Ed25519 Receipt

Receipt ID: b01c0b0a-760c-446b-ad11-f520d738d546
Output Hash: 209e62109cce87c2794e394cd38e068c60f0af05bd0614a7b8c5a29fc2eb2bd7
Signature: ed25519:d950c33ac438cac7a4d68c27430b59c779b5739ce4fa3803d507ad258501c9e853bfb51da7a4b276df84c019790aeba074e79c049ca740805b6df17d705ccc01
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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