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 cel.okinawa

Valid
Issued by (CA)
Let's Encrypt
Subject
cel.okinawa
Valid from
Aug 31, 2026
Valid until
Nov 29, 2026 (73 days remaining)
Public key
EC 256-bit
Serial
05F6BCECEC275186EE4CF9CBD76B3E39AB9E
SHA-256 fingerprint
14:25:81:72:2B:F6:82:F0:B4:FD:91:42:50:24:F9:74:C5:19:2A:3F:EC:6B:E4:49:2D:F6:9B:F8:AD:08:47:59
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (1)
cel.okinawa

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 16, 2026.

Never get surprised by cel.okinawa's certificate expiring

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

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.

Monitor this certificate free

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