SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
polna-city.cz
SSL/TLS Certificate
SSL/TLS Certificate for polna-city.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- polna-city.cz
- Valid from
- Nov 6, 2026
- Valid until
- Feb 4, 2027 (83 days remaining)
- Public key
- EC 256-bit
- Serial
- 0640DD0FB47F9D64F84C418DE8405AE674B3
- SHA-256 fingerprint
- EF:D2:FD:C6:96:D5:EA:BD:E5:6C:38:BA:78:3E:A7:96:00:A7:42:4A:58:79:DF:79:A7:2B:C5:CE:87:33:8E:0E
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 24, 2026.
Never get surprised by polna-city.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch polna-city.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.
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