SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for komyo-ji.tokyo

Valid
Issued by (CA)
Let's Encrypt
Subject
komyo-ji.tokyo
Valid from
Sep 15, 2026
Valid until
Dec 14, 2026 (38 days remaining)
Public key
RSA 2048-bit
Serial
060C7B43223E719241E0D556954C7816666A
SHA-256 fingerprint
1F:A1:92:F7:BE:08:EC:08:84:60:89:77:9A:A1:EF:BC:D3:0B:6D:69:19:74:3A:F2:75:BF:D2:3D:35:87:00:2C
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
komyo-ji.tokyo, www.komyo-ji.tokyo

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 Sep 24, 2026.

Never get surprised by komyo-ji.tokyo's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch komyo-ji.tokyo continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.