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 vim-jmk.cz

Valid
Issued by (CA)
Let's Encrypt
Subject
vim-jmk.cz
Valid from
Oct 26, 2026
Valid until
Jan 24, 2027 (84 days remaining)
Public key
EC 256-bit
Serial
064B0EBD7DCDDE308666ADEC20657E32022A
SHA-256 fingerprint
B7:1B:05:29:55:79:AF:47:1C:03:A5:3B:68:CC:1E:7C:76:40:6A:21:C3:DD:EE:01:29:03:84:06:C9:9F:BA:B5
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (12)
educationjobs.cz, jmskoly.cz, sssbrno.cz, vim-jmk.cz, vimjmk.cz, www.educationjobs.cz, www.jmskoly.cz, www.sssbrno.cz, www.vim-jmk.cz, www.vimjmk.cz, www.zlatytahak.cz, zlatytahak.cz

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 Aug 30, 2026.

Never get surprised by vim-jmk.cz's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch vim-jmk.cz 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.