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 nisa-art.cz

Expired
Issued by (CA)
GeoTrust, Inc.
Subject
*.zcom.cz
Valid from
Feb 2, 2011
Valid until
Feb 3, 2014 (expired 4553 days ago)
Public key
RSA 2048-bit
Serial
8CBF
SHA-256 fingerprint
7D:EC:31:9E:D8:29:95:A1:C1:D3:E4:B1:A2:55:55:A5:E2:E6:56:F9:E7:AE:8B:94:97:8B:C6:EC:96:F5:2A:CF
Chain
RapidSSL CA → GeoTrust Global CA
Subject Alternative Names (2)
*.zcom.cz, zcom.cz

Certificate Authority Authorization (CAA)

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

Never get surprised by nisa-art.cz's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch nisa-art.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.