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 sudop-plzen.cz

Valid
Issued by (CA)
Let's Encrypt
Subject
www.sudop-plzen.cz
Valid from
Jul 6, 2026
Valid until
Oct 4, 2026 (54 days remaining)
Public key
RSA 2048-bit
Serial
05EA394B01D4C3C2B2EECC930B07E2623276
SHA-256 fingerprint
26:8F:FF:99:17:44:48:0B:63:0F:AC:A3:73:BA:3D:69:00:1E:75:F6:78:48:EE:ED:83:65:B9:51:CE:BB:BB:13
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
sudop-plzen.cz, www.sudop-plzen.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 2, 2026.

Never get surprised by sudop-plzen.cz's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch sudop-plzen.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.