SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kc-cieszyn.pl
SSL/TLS Certificate
SSL/TLS Certificate for kc-cieszyn.pl
Valid- Issued by (CA)
- nazwa.pl Sp. z o.o.
- Subject
- *.kc-cieszyn.pl
- Valid from
- Feb 16, 2026
- Valid until
- Feb 15, 2027 (190 days remaining)
- Public key
- EC 384-bit
- Serial
- 7D0816D2522ED9582F41862E263850C7
- SHA-256 fingerprint
- 80:83:B2:E9:B9:E8:29:DC:02:DE:E3:88:4E:B4:EF:16:C7:C7:C9:1F:FD:F9:BA:1C:60:76:05:F6:B7:1F:B5:FE
- Chain
- nazwaSSL DV TLS G2 E29 CA → Certum EC-384 CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
CAA restricts issuance to certum.pl, letsencrypt.org; we couldn't map the serving CA (nazwa.pl Sp. z o.o.) to one of these identifiers.
This certificate has been served since Aug 7, 2026.
Never get surprised by kc-cieszyn.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kc-cieszyn.pl 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.