DNS Record Lookup

Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain

Hosting & Network

tier-one.fr runs on AS51985, with email configured.

Hosting network
AS51985AS51985
Managed DNS
Self-hosted / other
Email
Configured
IPv6 (AAAA)
Not enabled
CAA pinning
None

Sits alongside 7 other sites on AS51985. Stable here since we started watching (Oct 3, 2026).

The apex and www are the same hosting — the apex via A records, www via a CNAME to shm.adenis.fr.

DNS Records for tier-one.fr

HostnameTypeTTLPriorityContent
tier-one.frMX040mail.tier-one.fr
tier-one.frMX020fallbackmx.spamexperts.eu
tier-one.frMX030lastmx.spamexperts.net
tier-one.frMX010mx.spamexperts.com
tier-one.frNS0ns-57-c.gandi.net
tier-one.frNS0ns-167-b.gandi.net
tier-one.frNS0ns-3-a.gandi.net
tier-one.frSOA10800ns1.gandi.net hostmaster.gandi.net 1791417600 10800 3600 604800 10800
tier-one.frA05.39.238.124
tier-one.frTXT0v=spf1 a mx ~all
www.tier-one.frCNAME0shm.adenis.fr
www.tier-one.frA05.39.238.124

Get alerted the moment tier-one.fr's DNS changes

This page is today's snapshot. Turn on monitoring and we'll watch tier-one.fr continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor DNS free

Free for your first domain: uptime, DNS, and certificate together. No credit card.

What's up with DNS →

Our daily roundup of the most interesting DNS changes across the web — hosting and CDN migrations, network moves, and security-config shifts.

Ask about tier-one.fr

Beta

Answers use the live DNS records shown on this page. AI-generated — double-check anything important.

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