SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hotel-centrum.cz
SSL/TLS Certificate
SSL/TLS Certificate for hotel-centrum.cz
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- www.gradex.com
- Valid from
- Jan 4, 2026
- Valid until
- Apr 4, 2026 (expired 132 days ago)
- Public key
- RSA 2048-bit
- Serial
- 06C07823082BFF1DAC533C9C562A569E8153
- SHA-256 fingerprint
- FA:62:7A:4D:D1:14:10:50:52:11:87:81:99:25:B0:4C:64:D0:41:43:14:56:BE:3C:FB:01:A8:5B:93:05:1D:6E
- Chain
- R13 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by hotel-centrum.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch hotel-centrum.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.