usaco.org

Observed 2026-06-13T08:25:40.634Z (3h ago). Every field below was attested with an Ed25519 signature at scan time.

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Ed25519 Receipt

Receipt ID
b6b5bb23-3828-4aa1-b2f4-6ee975f593c1
Output Hash
d2cb9866fb7b37296132af0a705ce34c646688432c6c90d65a1533b99fa0fa03
Signature
ed25519:0731afdee3aceda9a356353dcf1205ecbced47341a1b9bf7848ee89f67f70b73a64c328592b75a9f4f9c6948bd50cd289c1c40b5402106f3f32647628789740d
Public Key
ed25519:d3f6015a95abdad7e8166ad80938a5885500170bb75f8cdb425b8fd2772bec29
Parent
(genesis)
Plane
fast
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DNS Records

A 2

  • 104.21.78.228
  • 172.67.137.226

AAAA 2

  • 2606:4700:3035::6815:4ee4
  • 2606:4700:3030::ac43:89e2

TXT 3

  • google-gws-recovery-domain-verification=49071871
  • v=spf1 ip4:130.127.0.0/16 a:clemson.edu ~all
  • v=DMARC1; p=none; rua=mailto:usaco_email@lists.clemson.edu

NS 2

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

SOA 1

  • {"mname":"andronicus.ns.cloudflare.com","rname":"dns.cloudflare.com","serial":2404641269,"refresh":10000,"retry":2400,"expire":604800,"minimum":1800}

TLS Certificates (3)

Common NameIssuerExpires
usaco.org C=US, O=Google Trust Services, CN=WE1 Mon, 17 Aug 2026 01:51:13 +0000
WE1 C=US, O=Google Trust Services LLC, CN=GTS Root R4 Tue, 20 Feb 2029 14:00:00 +0000
GTS Root R4 C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA Fri, 28 Jan 2028 00:00:42 +0000

Subdomains (0)

None observed.