Domain · Tranco #2,531

colorado.edu

colorado.edu is ranked #2,531 among the world's most-visited sites (Tranco). It resolves to 151.101.66.133, hosted on Varnish, and presents a TLS certificate issued by Certainly.

HTTP 301

Tranco rank	#2,531
IPv4	151.101.66.133, 151.101.2.133, 151.101.130.133, 151.101.194.133
IPv6	2a04:4e42:600::645, 2a04:4e42:200::645
Hosting / reverse DNS	Varnish
Nameservers	a1-153.akam.net, a11-66.akam.net, a2-67.akam.net, a20-65.akam.net
Mail servers (MX)	colorado-edu.mail.protection.outlook.com (10)
HTTP status	301 → https://www.colorado.edu/
Web server	Varnish
Detected tech	Varnish
TLS certificate	Certainly · expires 2026-08-24

Linked company

This domain's name matches a legal entity in our directory:

COLORADO HOLDING

Notable DNS TXT records

MS=ms27269994
atlassian-domain-verification=QAg9aEn1gpS7HapLhSZbdUei9wTKTCl8EKYsTFg5su7bO2Pu30QtUg9QsGZzz1Vw
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
google-site-verification=iaVX54MaxYscXlrL-DxuE9qtvLhAXkXKhG8sjiH5q-0
atlassian-sending-domain-verification=0b36ce8f-b8ec-42ae-8513-2264ea6d72e7

More .edu domains

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FAQ

What is the IP address of colorado.edu?

colorado.edu resolves to 151.101.66.133, 151.101.2.133, 151.101.130.133 (Varnish).

Who issued the SSL certificate for colorado.edu?

The TLS/SSL certificate for colorado.edu was issued by Certainly, valid until 2026-08-24.

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DNS/HTTP/TLS observed 2026-08-06; registration data via RDAP. Informational only. Download JSON · CSV · Browse domains