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 kotek.cz

Self-signed
Issued by (CA)
ZONER Software, a.s.
Subject
thalassa.zarea.net
Valid from
May 14, 2021
Valid until
May 12, 2031 (1755 days remaining)
Public key
RSA 2048-bit
Serial
511A8926268FCAF6EC88129298EFEA4F408F4256
SHA-256 fingerprint
D2:D6:19:79:38:5A:3D:E2:33:22:E3:59:E2:B9:BA:96:92:E6:BF:3F:1E:8C:05:DA:07:93:08:60:BF:A4:B3:20
Chain
thalassa.zarea.net

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by kotek.cz's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch kotek.cz 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.