SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
t-komachi.jp
SSL/TLS Certificate
SSL/TLS Certificate for t-komachi.jp
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- www.t-komachi.jp
- Valid from
- Aug 15, 2025
- Valid until
- Aug 21, 2026 (30 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 12F1BF4AF100B0F58E92966BB2834067
- SHA-256 fingerprint
- F4:F5:22:C5:DF:CD:8B:44:F6:33:64:B7:E2:63:38:62:A3:44:06:DC:37:74:89:8F:BA:73:17:5D:7E:4A:AE:92
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by t-komachi.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch t-komachi.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
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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