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Gridlode
Rank #744Updated November 10, 2026

colorado.edu

Home | University of Colorado Boulder

The site runs on Drupal, Varnish, Fastly and 8 other technologies. Its email security grade is C. Its SSL certificate is issued by Certainly and is valid for 22 more days.

Domain age
—
Technologies
11
Email security
C
SSL days left
22

DNS records

TypeValueTTL
A151.101.2.1333089
A151.101.130.1333089
A151.101.66.1333089
A151.101.194.1333089
MXcolorado-edu.mail.protection.outlook.com 101501
NSa22-67.akam.net3600
NSa20-65.akam.net3600
NSa3-66.akam.net3600
NSa2-67.akam.net3600
NSa11-66.akam.net3600
NSa1-153.akam.net3600
TXTatlassian-sending-domain-verification=0b36ce8f-b8ec-42ae-8513-2264ea6d72e73600
TXTyahoo-verification-key=LBMWN06qx3V2Edw1euv/698yUrWMNip2Dx3Y4yyVmYE=3600
TXTbrevo-code:5f9e8714a4a7c561eb4cdf0848811c113600
TXT_3x6w07ujdy2wk71two4k8r4mwmtw6tq3600
TXTatlassian-domain-verification=QAg9aEn1gpS7HapLhSZbdUei9wTKTCl8EKYsTFg5su7bO2Pu30QtUg9QsGZzz1Vw3600
TXTdocusign=7412fd08-3676-471a-8b65-8cc2b13c81373600
TXTd365mktkey=gzYMp5Xcnapx0VINCqRrvMtsD0TBSpLsrFjihN9HWQAx3600
TXTv=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 ~all3600
TXTd365mktkey=CgcAzx2nkxamTBkNT7jagrT8Nadf6LPzlI0MLQHdKA0x3600
TXTbrevo-code:369c77c6a5f703b937c1f7f79eb484893600
TXTgoogle-site-verification=iaVX54MaxYscXlrL-DxuE9qtvLhAXkXKhG8sjiH5q-03600
TXTjamf-site-verification=V7i5P5-QM02gTP25eIhZIA3600
AAAA2a04:4e42:400::6451829
AAAA2a04:4e42::6451829
AAAA2a04:4e42:600::6451829
AAAA2a04:4e42:200::6451829

Technology stack

Cache
Varnish
CDN
Fastly
CMS
Drupal
Fonts
Font AwesomeGoogle Fonts
Hosting
Pantheon
JavaScript library
jQuery
Programming language
PHP
Security
HSTS
Tag manager
Google Tag Manager
Web server
Nginx

Analytics and advertising IDs

google_tag_manager:GTM-M3DX2QP

SSL certificate

ValidValid
IssuerUS, Certainly Intermediate R1, Certainly
ExpiresDecember 2, 2026
Days remaining22
ProtocolTLSv1.2
Namescolorado.edu

Email security

CScore 79/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
  • warnSubdomains use a weaker policy (sp=none) than the main domain (p=reject).
  • warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
  • warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
  • warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
  • goodSPF record found.
  • goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
  • goodDMARC policy is reject: mail that fails authentication is blocked.
  • goodDMARC aggregate reports are sent to mailto:[email protected], mailto:[email protected].
  • goodDKIM keys found (selector: google, selector1, selector2, default, k2, s1, s2, mail).
  • good1 MX record(s) found. Mail is handled by Microsoft 365.

Homepage metadata

TitleHome | University of Colorado Boulder
DescriptionColorado’s leading public research university, transforming lives since 1876.
Languageen
Canonicalhttps://www.colorado.edu/
IndexableYes
Word count968

About colorado.edu

What technology does colorado.edu use?

We detected 11 technologies on colorado.edu, including Varnish, Fastly, Drupal, Font Awesome, Google Fonts, Pantheon.

Does colorado.edu protect its email with SPF and DMARC?

colorado.edu scores 79/100 (grade C) for email security. Subdomains use a weaker policy (sp=none) than the main domain (p=reject). No MTA-STS: mail sent to you can be downgraded to an unencrypted connection.

What are the name servers of colorado.edu?

colorado.edu uses a22-67.akam.net, a20-65.akam.net, a3-66.akam.net, a2-67.akam.net, a11-66.akam.net, a1-153.akam.net.