DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
cnu21.org runs on CDN77 (multi-homed across 2 networks), with email configured.
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 13,280 other sites on CDN77. Stable here since we started watching (Sep 13, 2026).
DNS Records for cnu21.org
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| cnu21.org | TXT | 0 | v=spf1 include:mxroute.com -all | |
| cnu21.org | MX | 0 | 20 | ocean-relay.mxroute.com |
| cnu21.org | MX | 0 | 10 | ocean.mxroute.com |
| cnu21.org | A | 0 | 169.150.236.107 | |
| cnu21.org | AAAA | 0 | 2400:52e0:1a00::940:1 | |
| cnu21.org | SOA | 300 | ns1.dnsimple.com admin.dnsimple.com 1739789474 86400 7200 604800 300 | |
| cnu21.org | NS | 0 | ns4.dnsimple-edge.org | |
| cnu21.org | NS | 0 | ns2.dnsimple-edge.net | |
| cnu21.org | NS | 0 | ns3.dnsimple.com | |
| cnu21.org | NS | 0 | ns1.dnsimple.com | |
| www.cnu21.org | A | 0 | 169.150.236.99 | |
| www.cnu21.org | AAAA | 0 | 2400:52e0:1a00::1068:1 |
Get alerted the moment cnu21.org's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch cnu21.org 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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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