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

21stmail.com

DNS Records

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Hosting & Network

21stmail.com runs on AS12083.

Hosting network
AS12083AS12083
Managed DNS
Self-hosted / other
Email
None
IPv6 (AAAA)
Not enabled
CAA pinning
None

Sits alongside 414 other sites on AS12083. Stable here since we started watching (Aug 22, 2026).

The apex and www are the same hosting — the apex via A records.

DNS Records for 21stmail.com

HostnameTypeTTLPriorityContent
21stmail.comA0143.59.192.101
21stmail.comNS0ns78.worldnic.com
21stmail.comNS0ns77.worldnic.com
21stmail.comSOA3600NS77.WORLDNIC.com namehost.WORLDNIC.com 126041309 10800 3600 604800 3600
21stmail.comTXT0s49gfneohjvt5hhib8auocb3ro
21stmail.comTXT0bcnilk3cdg3ji5vabvdb1ac342
21stmail.comTXT01g84vojrcu0mm8dkuoi6ggqgie
21stmail.comTXT04tbo7tu62iqo8naqcel7pm33gp
21stmail.comTXT058odoiojjim7jsm309n9lsp81l
21stmail.comTXT0bvm-site-verification=6f0bc218a445c422d596d7c67477664131e79f3f
www.21stmail.comA0143.59.192.101

Get alerted the moment 21stmail.com's DNS changes

This page is today's snapshot. Turn on monitoring and we'll watch 21stmail.com 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.

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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