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Hosting & Network
optim.co.jp runs on AS9370, with DNS by AWS Route 53 and email via Microsoft 365.
- Hosting network
- AS9370AS9370
- Managed DNS
- AWS Route 53
- Microsoft 365
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 28,494 other sites on AS9370. Stable here since we started watching (Sep 15, 2026).
DNS Records for optim.co.jp
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| optim.co.jp | SOA | 86400 | ns-681.awsdns-21.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400 | |
| optim.co.jp | MX | 0 | optim-co-jp.mail.protection.outlook.com | |
| optim.co.jp | NS | 0 | ns-681.awsdns-21.net | |
| optim.co.jp | NS | 0 | ns-62.awsdns-07.com | |
| optim.co.jp | NS | 0 | ns-1120.awsdns-12.org | |
| optim.co.jp | NS | 0 | ns-1818.awsdns-35.co.uk | |
| optim.co.jp | A | 0 | 153.125.235.56 | |
| optim.co.jp | TXT | 0 | ZOOM_verify_B6FkwI14FEHgogFfqDZ6SR | |
| optim.co.jp | TXT | 0 | google-site-verification=iQkZtx2M9pE5l9ccTFy9a9lSztNseyOl6grk8hK2YkI | |
| optim.co.jp | TXT | 0 | cursor-domain-verification-rg8ng8=mJ225snm0kPCav5x2epZXBr20 | |
| optim.co.jp | TXT | 0 | MS=ms87298999 | |
| optim.co.jp | TXT | 0 | anthropic-domain-verification-dd87w5=xFP92W4REPAYYujrpVrdjEHKn | |
| optim.co.jp | TXT | 0 | google-site-verification=E9BgQlBvpz2xLZ5PombqZWh_kc0X8CYRnY2Ezpgxkm0 | |
| optim.co.jp | TXT | 0 | google-site-verification=W3UaIGegm31vcUIiqIlLr6wByFAkUBk3aWJlsCAS8JI | |
| optim.co.jp | TXT | 0 | v=spf1 include:spf.protection.outlook.com include:_spf.optim.co.jp include:_spf_biz.optim.co.jp include:sender.zcsend.jp include:mail.zendesk.com include:243271648.spf01.hubspotemail.net ip4:49.212.183.62/32 ip4:160.16.114.98/32 ?all | |
| optim.co.jp | TXT | 0 | google-site-verification=dqQgFGBBR-5dH7KI2xvXXBjia2fOFJMrKvEIQA60Ze0 | |
| optim.co.jp | TXT | 0 | openai-domain-verification=dv-BAflDfhIAKGp1CkOdZdSdlV2 | |
| www.optim.co.jp | CNAME | 0 | www.optim.co.jp.cdn.cloudflare.net | |
| www.optim.co.jp | AAAA | 0 | 2606:4700:10::ac42:9c49 | |
| www.optim.co.jp | AAAA | 0 | 2606:4700:10::6814:20bc | |
| www.optim.co.jp | A | 0 | 172.66.156.73 | |
| www.optim.co.jp | A | 0 | 104.20.32.188 |
Get alerted the moment optim.co.jp's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch optim.co.jp 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
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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