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Hosting & Network
d21.co.jp runs on Amazon AWS, with DNS by AWS Route 53 and email via Google Workspace.
- Hosting network
- Amazon AWSAS16509Amazon AWS
- Managed DNS
- AWS Route 53
- Google Workspace
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- Set
Sits alongside 4,999+ other sites on Amazon AWS. Stable here since we started watching (Jul 31, 2026).
The apex and www are the same hosting — the apex via A records, www via a CNAME to d21.co.jp.
DNS Records for d21.co.jp
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| d21.co.jp | SOA | 86400 | ns-904.awsdns-49.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400 | |
| d21.co.jp | CAA | 0 | 0 issue letsencrypt.org | |
| d21.co.jp | CAA | 0 | 0 issue jprs.jp | |
| d21.co.jp | CAA | 0 | 0 issue amazon.com | |
| d21.co.jp | A | 0 | 54.248.33.68 | |
| d21.co.jp | A | 0 | 16.76.116.95 | |
| d21.co.jp | A | 0 | 57.181.214.147 | |
| d21.co.jp | MX | 0 | 20 | alt2.aspmx.l.google.com |
| d21.co.jp | MX | 0 | 10 | aspmx.l.google.com |
| d21.co.jp | MX | 0 | 30 | aspmx4.googlemail.com |
| d21.co.jp | MX | 0 | 20 | alt1.aspmx.l.google.com |
| d21.co.jp | MX | 0 | 30 | aspmx3.googlemail.com |
| d21.co.jp | MX | 0 | 30 | aspmx2.googlemail.com |
| d21.co.jp | MX | 0 | 30 | aspmx5.googlemail.com |
| d21.co.jp | NS | 0 | ns-904.awsdns-49.net | |
| d21.co.jp | NS | 0 | ns-1769.awsdns-29.co.uk | |
| d21.co.jp | NS | 0 | ns-472.awsdns-59.com | |
| d21.co.jp | NS | 0 | ns-1456.awsdns-54.org | |
| d21.co.jp | TXT | 0 | v=spf1 +mx include:amazonses.com include:spf.form.run include:_spf.google.com include:spf.eco-serv.jp include:spf.haihaimail.jp include:148529722.spf04.hubspotemail.net ~all | |
| d21.co.jp | TXT | 0 | google-site-verification=-vvLZtWAbJ0M4yUs-IBQGIRdjaUhB-a2tRI0B7dLgCM | |
| d21.co.jp | TXT | 0 | seculio-domain-verification-code=58036a730902df20ce05e7016f2275f4aefe52667769efc2ace2a1a1d22f2ef6 | |
| d21.co.jp | TXT | 0 | google-site-verification=pPlGva-AeOwV55MRc-YYRNGgVbpKVVR91MaFh-Y_Zaw | |
| d21.co.jp | TXT | 0 | apple-domain-verification=LPp4CXnx6EV9PoDo | |
| d21.co.jp | TXT | 0 | MS=A24B89934B63C48A33A2C1549D47AC982A5089EC | |
| www.d21.co.jp | CAA | 0 | 0 issue amazon.com | |
| www.d21.co.jp | CAA | 0 | 0 issue jprs.jp | |
| www.d21.co.jp | CAA | 0 | 0 issue letsencrypt.org | |
| www.d21.co.jp | A | 0 | 54.248.33.68 | |
| www.d21.co.jp | A | 0 | 57.181.214.147 | |
| www.d21.co.jp | A | 0 | 16.76.116.95 | |
| www.d21.co.jp | CNAME | 0 | d21.co.jp | |
| www.d21.co.jp | NS | 0 | ns-1769.awsdns-29.co.uk | |
| www.d21.co.jp | NS | 0 | ns-904.awsdns-49.net | |
| www.d21.co.jp | NS | 0 | ns-472.awsdns-59.com | |
| www.d21.co.jp | NS | 0 | ns-1456.awsdns-54.org | |
| www.d21.co.jp | SOA | 86400 | ns-904.awsdns-49.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400 | |
| www.d21.co.jp | MX | 0 | 20 | alt2.aspmx.l.google.com |
| www.d21.co.jp | MX | 0 | 20 | alt1.aspmx.l.google.com |
| www.d21.co.jp | MX | 0 | 30 | aspmx2.googlemail.com |
| www.d21.co.jp | MX | 0 | 10 | aspmx.l.google.com |
| www.d21.co.jp | MX | 0 | 30 | aspmx4.googlemail.com |
| www.d21.co.jp | MX | 0 | 30 | aspmx3.googlemail.com |
| www.d21.co.jp | MX | 0 | 30 | aspmx5.googlemail.com |
| www.d21.co.jp | TXT | 0 | google-site-verification=-vvLZtWAbJ0M4yUs-IBQGIRdjaUhB-a2tRI0B7dLgCM | |
| www.d21.co.jp | TXT | 0 | seculio-domain-verification-code=58036a730902df20ce05e7016f2275f4aefe52667769efc2ace2a1a1d22f2ef6 | |
| www.d21.co.jp | TXT | 0 | google-site-verification=pPlGva-AeOwV55MRc-YYRNGgVbpKVVR91MaFh-Y_Zaw | |
| www.d21.co.jp | TXT | 0 | v=spf1 +mx include:amazonses.com include:spf.form.run include:_spf.google.com include:spf.eco-serv.jp include:spf.haihaimail.jp include:148529722.spf04.hubspotemail.net ~all | |
| www.d21.co.jp | TXT | 0 | apple-domain-verification=LPp4CXnx6EV9PoDo | |
| www.d21.co.jp | TXT | 0 | MS=A24B89934B63C48A33A2C1549D47AC982A5089EC |
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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