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Rank #8,364Updated November 10, 2026

circleci.com

Autonomous validation for the AI era - CircleCI

circleci.com is registered with Amazon Registrar, Inc. since September 1, 2011 (15.2 years). The registration expires on September 1, 2027. The site runs on Contentful, Optimizely, LinkedIn Insight Tag and 11 other technologies. Its email security grade is B. Its SSL certificate is issued by Amazon and is valid for 86 more days.

Domain age
15.2 yrs
Technologies
14
Email security
B
SSL days left
86

Registration

RegistrarAmazon Registrar, Inc.
IANA ID468
RegisteredSeptember 1, 2011
ExpiresSeptember 1, 2027
UpdatedJuly 28, 2026
Statusclient transfer prohibited
Name serversns-1065.awsdns-05.org, ns-1572.awsdns-04.co.uk, ns-225.awsdns-28.com, ns-837.awsdns-40.net
DNSSECNot signed

DNS records

TypeValueTTL
A13.32.121.9844
A13.32.121.444
A13.32.121.10344
A13.32.121.3844
MXmxa-00672001.gslb.pphosted.com 101800
MXmxb-00672001.gslb.pphosted.com 101800
NSns-1065.awsdns-05.org172800
NSns-1572.awsdns-04.co.uk172800
NSns-225.awsdns-28.com172800
NSns-837.awsdns-40.net172800
TXT0rSSf1XYrVTQD0nx3uXSOqfLql67Dq7NHJxd7Bb4AEs=300
TXTDC5E374380300
TXTOSSRH-51450300
TXTZOOM_verify_XxtkbTmXREqW-gC9oUt_JQ300
TXTadobe-idp-site-verification=e62bdaaa6e859ff8bd5bf72625dbbd549c23f0de1fdb766235ef9e3040001e67300
TXTanthropic-domain-verification-v8cdhs=P5CPYQkBtkjBPMgAZIvtut9zd300
TXTapple-domain-verification=BkV5OZenVheGWVKC300
TXTastro-domain-verification=cml9sndz92qqm01jm14o8nqho300
TXTatlassian-domain-verification=9tj+F5NsRlmMKY+gbNLn4kP5OmRWYtiQbLcnIFwe3m4l+99gvwWJU5/vJ+3f0TOq300
TXTbox-domain-verification=5f46d2be1dbceca19facc856c1c495d1e542fc177dfd64eb9cce08de605c198a300
TXTccisso=e9697c9a-798a-48ee-999e-44a7f9eab0a2300
TXTclojars circleci_publish300

Technology stack

A/B testing
Optimizely
Advertising
LinkedIn Insight TagReddit Pixel
Analytics
AmplitudeMicrosoft ClaritySegment
CDN
Amazon CloudFront
CMS
Contentful
Cookie consent
Cookiebot
Fonts
Google Fonts
Marketing automation
Marketo
Search
Algolia
Security
HSTS
Tag manager
Google Tag Manager

Analytics and advertising IDs

google_tag_manager:GTM-W9HDVK

SSL certificate

ValidValid
IssuerUS, Amazon RSA 2048 M04, Amazon
ExpiresFebruary 5, 2027
Days remaining86
ProtocolTLSv1.3
Namescircleci.com, canary.circleci.com, experiment.circleci.com, badges.circleci.com, email.circleci.com

Email security

BScore 80/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
  • warnDKIM key found (selector: google, k1) but it is only 1024 bits; 2048 is recommended.
  • 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].
  • good2 MX record(s) found. Mail is handled by Proofpoint.

Homepage metadata

TitleAutonomous validation for the AI era - CircleCI
DescriptionDeliver production-ready software at AI speed. CircleCI helps modern teams validate, test, and ship every change with intelligent automation.
Languageen
Canonicalhttps://circleci.com/
Structured dataOrganization
IndexableYes
Word count2459

About circleci.com

Who is the registrar of circleci.com?

circleci.com is registered with Amazon Registrar, Inc. (IANA ID 468).

When does circleci.com expire?

The current registration of circleci.com expires on September 1, 2027. It was first registered on September 1, 2011.

What technology does circleci.com use?

We detected 14 technologies on circleci.com, including Optimizely, LinkedIn Insight Tag, Reddit Pixel, Amplitude, Microsoft Clarity, Segment.

Does circleci.com protect its email with SPF and DMARC?

circleci.com scores 80/100 (grade B) for email security. DKIM key found (selector: google, k1) but it is only 1024 bits; 2048 is recommended. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection.

What are the name servers of circleci.com?

circleci.com uses ns-1065.awsdns-05.org, ns-1572.awsdns-04.co.uk, ns-225.awsdns-28.com, ns-837.awsdns-40.net.