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cern.ch

DNS Records

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Hosting & Network

cern.ch runs on AS513, with email via Microsoft 365.

Hosting network
AS513AS513
Managed DNS
Self-hosted / other
Email
Microsoft 365
IPv6 (AAAA)
Enabled
CAA pinning
None

Sits alongside 80 other sites on AS513. Stable here since we started watching (Jul 15, 2026).

The apex and www are the same hosting — the apex via A records, www via a CNAME to paas-apps-lb-tncrit.cern.ch.

DNS Records for cern.ch

HostnameTypeTTLPriorityContent
cern.chA0188.184.77.250
cern.chMX010cern-ch.mail.protection.outlook.com
cern.chNS0ext-dns-2.cern.ch
cern.chNS0ext-dns-1.cern.ch
cern.chNS0scsnms.switch.ch
cern.chTXT0sinch-domain-verification=1fa8887b-9312-4ca2-85f8-75f7c1ba81fd
cern.chTXT0goqTmP4CYqgXEPONka9g8FCGD4vpvjieG4RI5NLxYZsBh/y5p88K9ym3zIFcLVbaYQdJkdhfYcjADXGdGMdSCA==
cern.chTXT0openai-domain-verification=dv-R5PuLWpZKT8QhVzrlbLDHvBz
cern.chTXT0v=spf1 include:spf.cern.ch ?all
cern.chTXT0google-site-verification=aoFc91q4kA9Xp_-Z_AFY1gI0AmXpTXIMcGseZfvH0J8
cern.chTXT0mistral-domain-verification=3a255465ec599b8016fb91a2f8563cc304e3b95d
cern.chTXT0autodesk-domain-verification=5Lt81tqLuEgD4wCC73YQ
cern.chTXT0MS=ms44269116
cern.chTXT0cursor-domain-verification-8t0p9r=J6wFIABgbtZfHacKasG8HDZ1p
cern.chTXT0anthropic-domain-verification-4kfdsh=uvjsOh2bjwteama1zHsw7FZtw
cern.chSOA900ext-dns-1.cern.ch external-dns.cern.ch 2013771075 1200 300 2419200 900
cern.chAAAA02001:1458:d00:3c::100:2f9
www.cern.chCNAME0paas-apps-lb-tncrit.cern.ch
www.cern.chNS0ext-dns-2.cern.ch
www.cern.chNS0ext-dns-1.cern.ch
www.cern.chAAAA02001:1458:d00:3c::100:2f9
www.cern.chA0188.184.77.250
www.cern.chSOA60ext-dns-1.cern.ch external-dns.cern.ch 3 3600 300 3600000 60

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About DNS Records

DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:

  • SOA (Start of Authority) - Contains administrative information about the zone
  • NS (Nameserver) - Specifies authoritative nameservers for the domain
  • A (Address) - Maps a domain to an IPv4 address
  • AAAA - Maps a domain to an IPv6 address
  • CNAME (Canonical Name) - Creates an alias pointing to another domain
  • MX (Mail Exchange) - Specifies mail servers for the domain