SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
homma-dentalclinic.jp
SSL/TLS Certificate
SSL/TLS Certificate for homma-dentalclinic.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- homma-dentalclinic.jp
- Valid from
- Jul 17, 2026
- Valid until
- Oct 15, 2026 (82 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 051C1E9FFD95F62BBDB98FB93761584CE9DE
- SHA-256 fingerprint
- 3F:E6:75:93:4E:50:4C:8B:FC:69:1E:B1:29:07:8B:4C:34:41:B7:4D:1A:07:F7:C4:A2:18:34:00:A3:97:55:FD
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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