SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
alfa-pl.com
SSL/TLS Certificate
SSL/TLS Certificate for alfa-pl.com
Valid- Issued by (CA)
- nazwa.pl Sp. z o.o.
- Subject
- alfa-pl.com
- Valid from
- Sep 15, 2026
- Valid until
- Mar 14, 2027 (172 days remaining)
- Public key
- EC 384-bit
- Serial
- 3235C66ECD608CEC0613AF05BED739C7
- SHA-256 fingerprint
- F9:FF:4B:FA:45:CD:6F:02:3C:C1:06:7E:BC:D7:65:98:B6:E9:3B:9A:6D:F4:63:4D:01:A8:C4:91:04:41:93:2A
- 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 Sep 22, 2026.
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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.
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