SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zefir-ac.pl
SSL/TLS Certificate
SSL/TLS Certificate for zefir-ac.pl
Valid- Issued by (CA)
- nazwa.pl Sp. z o.o.
- Subject
- zefir-ac.pl
- Valid from
- Sep 30, 2026
- Valid until
- Apr 6, 2027 (182 days remaining)
- Public key
- EC 384-bit
- Serial
- 06519D7992BB5BFD6D13B7E356BCCB5C
- SHA-256 fingerprint
- 7C:CE:C1:74:85:9F:BC:C2:92:1C:13:77:17:9F:D8:94:2A:13:A1:9C:73:98:76:2D:ED:DB:5B:55:A6:A2:80:5B
- 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.
Never get surprised by zefir-ac.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zefir-ac.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.