colorado.edu

Observed Jul 24, 2026, 02:43 UTC (1h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation — watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Runs onFastly

Email byMicrosoft 365

Secured byCertainly

Also usesAtlassianDocuSignGoogle Search Console

IPv6 · education_expanded

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

INFRASTRUCTURE MAPwhat colorado.edu actually stands on - every host below is a signed observation

colorado.edu

A / AAAA

151.101.66.133151.101.130.133151.101.194.133151.101.2.133+4 more

Fastlyserves the site

a11-66.akam.neta1-153.akam.neta3-66.akam.neta2-67.akam.net+2 more

akam.netanswers its DNS

colorado-edu.mail.protection.outlook.com

Microsoft 365receives its email

TLS

colorado.edu

Certainlyissued its certificate

DNS Records

A 4

151.101.66.133
151.101.130.133
151.101.194.133
151.101.2.133

AAAA 4

2a04:4e42:200::645
2a04:4e42:600::645
2a04:4e42::645
2a04:4e42:400::645

MX 1

10colorado-edu.mail.protection.outlook.com

TXT 20

brevo-code:814ad43e9f25b1a52d6a2b213fcfae73
v=spf1 ip4:128.138.1.0/24 ip4:128.138.48.0/20 ip4:128.138.64.0/18 ip4:128.138.128.0/17 ip4:204.228.68.0/22 ip4:132.194.255.30 ip4:136.147.136.157 include:_spf1.colorado.edu include:_spf2.colorado.edu ~all
atlassian-domain-verification=QAg9aEn1gpS7HapLhSZbdUei9wTKTCl8EKYsTFg5su7bO2Pu30QtUg9QsGZzz1Vw
openai-domain-verification=dv-5hwuyXiWaOnaq12vb3n73azV
yahoo-verification-key=LBMWN06qx3V2Edw1euv/698yUrWMNip2Dx3Y4yyVmYE=
docusign=dcb8d5d8-71e8-4884-8604-02297bea8072
bw=E1ibKK7mvTTWmq1SV+b/usJyVdN63EU+WFJh+SCp+abE
brevo-code:d6b523305300718643a7da77b3feeccb
docusign=7412fd08-3676-471a-8b65-8cc2b13c8137
MS=ms27269994

NS 6

a11-66.akam.net
a1-153.akam.net
a3-66.akam.net
a2-67.akam.net
a20-65.akam.net
a22-67.akam.net

SOA 1

a1-153.akam.net dnsadmin.colorado.edu

TLS Certificates (2)

Common Name	Issuer	Expires
`colorado.edu`	C=US, O=Certainly, CN=Certainly Intermediate R1	Tue, 04 Aug 2026 07:23:21 +0000
`Certainly Intermediate R1`	C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Root Certificate Authority - G2	Mon, 21 Jun 2032 23:59:59 +0000

Subdomains (0)

None observed.

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 colorado.edu. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_d48b9ec1c95085d9
Output Hash: 7b6c19f2c9733922253d14d127fea1e6e10128a8258a40034303b8f4173883ab
Signature: ed25519:d5f9263ba2b35731ea06382a9419f01899d236416a7f4797847f23461defa0f3bdffb2de34cb9411ee6c5f8c3d946367ec90673da0224a3ae89d14e1ba030203
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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