SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bunkyo-med.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for bunkyo-med.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.bunkyo-med.or.jp
- Valid from
- Oct 21, 2026
- Valid until
- Jan 19, 2027 (77 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 060D6784D460AE25234D7204C439DB514DF8
- SHA-256 fingerprint
- 0D:C6:E3:46:92:B5:F4:23:66:43:B8:D6:AF:5C:7E:53:B4:A5:B3:75:30:54:93:B6:65:9C:0D:49:50:98:97:65
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 25, 2026.
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Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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