SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zenyo-ji.jp
SSL/TLS Certificate
SSL/TLS Certificate for zenyo-ji.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- zenyo-ji.jp
- Valid from
- Oct 13, 2026
- Valid until
- Jan 11, 2027 (63 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 066D3EB9ED5109E221C9C283270E68CCAAF1
- SHA-256 fingerprint
- 27:02:F9:02:20:BE:5C:60:56:04:61:AE:1B:B0:00:2C:20:3C:64:A0:CB:16:32:6D:95:79:69:19:9F:5C:BC:54
- 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.
This certificate has been served since Nov 8, 2026.
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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, 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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