SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
osawa-clinic.jp
SSL/TLS Certificate
SSL/TLS Certificate for osawa-clinic.jp
Valid- Issued by (CA)
- Japan Registry Services Co., Ltd.
- Subject
- osawa-clinic.jp
- Valid from
- Jun 12, 2026
- Valid until
- Nov 30, 2026 (111 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 3D126EBF7B37A82FB15900ECF3F8E1EF
- SHA-256 fingerprint
- 19:53:21:DB:80:32:D3:03:2E:AA:1A:D4:E1:6B:39:31:30:75:8C:3D:20:6B:97:66:71:64:B5:58:7D:BC:77:09
- Chain
- JPRS Domain Validation Authority - G4
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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