DNS Record Lookup

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

a3s.ca

DNS Records

WhoisRDAPDNS RecordsCertificateUptimeDiagnosticsHistoryHide Contact Info

Hosting & Network

a3s.ca runs on AS40092, with email configured.

Hosting network
AS40092AS40092
Managed DNS
Self-hosted / other
Email
Configured
IPv6 (AAAA)
Enabled
CAA pinning
Set

Sits alongside 4,999+ other sites on AS40092. Stable here since we started watching (Aug 6, 2026).

The apex and www are the same hosting — the apex via A records, www via a CNAME to a3s.ca.

DNS Records for a3s.ca

HostnameTypeTTLPriorityContent
a3s.caTXT0v=spf1 ip4:66.102.128.43 +a +mx +ip4:69.172.204.200 +include:spf.antispamcloud.com +include:spf.websiteservername.com ~allgoogle-site-verification=enAVC0hSRsNXc6gFGrRF9BYnS4TLiKF5ludhosLsom8
a3s.caCAA00 issue letsencrypt.org
a3s.caCAA00 issuewild pki.goog
a3s.caCAA00 issuewild sectigo.com
a3s.caCAA00 issuewild globalsign.com
a3s.caCAA00 issue pki.goog
a3s.caCAA00 issuewild letsencrypt.org
a3s.caCAA00 issue sectigo.com
a3s.caCAA00 issue globalsign.com
a3s.caMX0a3s.ca
a3s.caA066.102.128.43
a3s.caAAAA02605:6f00:1234:701:1::c5
a3s.caSOA10800ns1.websiteservername.com admin.websiteservername.com 2026080401 3600 3600 1209600 10800
a3s.caNS0ns1.websiteservername.com
a3s.caNS0ns2.websiteservername.com
www.a3s.caTXT0v=spf1 ip4:66.102.128.43 +a +mx +ip4:69.172.204.200 +include:spf.antispamcloud.com +include:spf.websiteservername.com ~allgoogle-site-verification=enAVC0hSRsNXc6gFGrRF9BYnS4TLiKF5ludhosLsom8
www.a3s.caCAA00 issue letsencrypt.org
www.a3s.caCAA00 issuewild letsencrypt.org
www.a3s.caCAA00 issuewild pki.goog
www.a3s.caCAA00 issuewild sectigo.com
www.a3s.caCAA00 issue sectigo.com
www.a3s.caCAA00 issue globalsign.com
www.a3s.caCAA00 issuewild globalsign.com
www.a3s.caCAA00 issue pki.goog
www.a3s.caNS0ns1.websiteservername.com
www.a3s.caNS0ns2.websiteservername.com
www.a3s.caCNAME0a3s.ca
www.a3s.caMX0a3s.ca
www.a3s.caSOA10800ns1.websiteservername.com admin.websiteservername.com 2026080401 3600 3600 1209600 10800
www.a3s.caAAAA02605:6f00:1234:701:1::c5
www.a3s.caA066.102.128.43

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 a3s.ca

Beta

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

Get alerted the moment a3s.ca's DNS changes

This page is today's snapshot. Turn on monitoring and we'll watch a3s.ca 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.

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