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 vysilacky-hytera.cz

Expiring soon
Issued by (CA)
Let's Encrypt
Subject
www.hyt.cz
Valid from
Aug 31, 2026
Valid until
Nov 29, 2026 (17 days remaining)
Public key
RSA 2048-bit
Serial
05D6ADC039E9C6BF29A4544FD7EC5F4AECAB
SHA-256 fingerprint
86:C9:2E:7A:DE:39:59:DE:D3:18:A6:DB:D8:0F:F0:E6:C2:68:99:12:44:28:19:E3:54:13:76:37:72:FE:09:5B
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (4)
hyt.cz, vysilacky-hytera.cz, www.hyt.cz, www.vysilacky-hytera.cz

Certificate Authority Authorization (CAA)

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

Never get surprised by vysilacky-hytera.cz's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch vysilacky-hytera.cz continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, CNAME, TXT 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.