SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
polni-navigace.cz
SSL/TLS Certificate
SSL/TLS Certificate for polni-navigace.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- polni-navigace.cz
- Valid from
- Nov 2, 2026
- Valid until
- Jan 31, 2027 (85 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06088E98E7FA5438F00D0B0F8CB2B1EE0AE6
- SHA-256 fingerprint
- B3:27:C1:0B:0F:EE:7F:29:AE:04:92:FF:98:E5:9D:6E:91:F2:34:71:5A:D7:FC:F6:34:03:8A:3B:DD:49:DF:93
- Chain
- YR2 → Root YR → ISRG Root X1
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 Sep 23, 2026.
Never get surprised by polni-navigace.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch polni-navigace.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.