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 cizinci.cz

Untrusted chain
Issued by (CA)
DigiCert Inc
Subject
cizinci.cz
Valid from
Apr 20, 2026
Valid until
Nov 4, 2026 (101 days remaining)
Public key
RSA 2048-bit
Serial
057365B2812EAB4D1C887507A6B88141
SHA-256 fingerprint
09:79:61:03:5C:4D:FB:CA:84:45:E2:9B:D1:CB:A6:F5:89:2F:F5:4E:13:82:F2:A9:BE:72:1F:E2:AB:EE:16:93
Chain
Subject Alternative Names (4)
cizinci.cz, www-i.cizinci.cz, www-t.cizinci.cz, www.cizinci.cz

Certificate Authority Authorization (CAA)

The serving CA (DigiCert Inc) is authorized by this domain's CAA records (digicert.com).

Never get surprised by cizinci.cz's certificate expiring

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