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Hosting & Network
cdt21.com runs on AS131965, with email via Google Workspace.
- Hosting network
- AS131965AS131965
- Managed DNS
- Self-hosted / other
- Google Workspace
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 4,999+ other sites on AS131965. Stable here since we started watching (Jul 21, 2026).
DNS Records for cdt21.com
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| cdt21.com | TXT | 0 | google-site-verification=PE8N0Ge6dFjIGuDki5oDccgB_CmdIkEAPcwEbaNdHL8 | |
| cdt21.com | TXT | 0 | v=spf1 +a:sv5288.xserver.jp +a:cdt21.com +mx include:spf.sender.xserver.jp ~all | |
| cdt21.com | TXT | 0 | _pvkh7liscmarniu0orw42jxr7y03pta | |
| cdt21.com | TXT | 0 | google-site-verification=QlPbIBKDuvAKccruFCngbLAqHUs5oSzNPpjqgji7dag | |
| cdt21.com | TXT | 0 | 2dkdnb03f0tv5smd4tqdcbvtj7lvh7lj | |
| cdt21.com | TXT | 0 | br02n32nwvhyp53dmz1qndqzmvnqwzbp | |
| cdt21.com | TXT | 0 | _r9xz5tugowv2ekxyulhy7onu9hl3ogr | |
| cdt21.com | TXT | 0 | vtkrrflf82z4ly7h1mlqmr97td8ylwvn | |
| cdt21.com | MX | 0 | 10 | aspmx2.googlemail.com |
| cdt21.com | MX | 0 | 1 | aspmx.l.google.com |
| cdt21.com | MX | 0 | 5 | alt1.aspmx.l.google.com |
| cdt21.com | MX | 0 | 5 | alt2.aspmx.l.google.com |
| cdt21.com | MX | 0 | 10 | aspmx3.googlemail.com |
| cdt21.com | A | 0 | 157.112.183.129 | |
| cdt21.com | NS | 0 | ns2.xserver.jp | |
| cdt21.com | NS | 0 | ns3.xserver.jp | |
| cdt21.com | NS | 0 | ns5.xserver.jp | |
| cdt21.com | NS | 0 | ns4.xserver.jp | |
| cdt21.com | NS | 0 | ns1.xserver.jp | |
| cdt21.com | SOA | 3600 | ns1.xserver.jp root.xserver.jp 0 10800 3600 604800 3600 | |
| www.cdt21.com | A | 0 | 183.90.236.97 |
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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