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 sb-web.cz

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
lexykm.cz
Valid from
Aug 28, 2026
Valid until
Nov 26, 2026 (65 days remaining)
Public key
RSA 2048-bit
Serial
06403A4C5EB6481B585D92FDF48FFE7DCF95
SHA-256 fingerprint
3F:0E:B6:AC:37:6B:02:04:BA:92:C3:D2:9C:DF:01:32:BD:49:3B:C6:40:D6:3C:41:1A:31:DE:38:8F:15:39:60
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (17)
feedtec.cz, gyneko.cz, lakovna-zdetin.cz, lexykm.cz, mapalu.cz, nabytek-drobena.cz, oou.cloud, reznyporadenstvi.cz, tabor.lexykm.cz, ubytovna-zdetin.cz, vlk-stavebni.cz, www.feedtec.cz, www.gyneko.cz, www.lexykm.cz, www.mapalu.cz, www.nabytek-drobena.cz, www.reznyporadenstvi.cz

Certificate Authority Authorization (CAA)

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

Never get surprised by sb-web.cz's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch sb-web.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.