SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
s-d-s.com.pl
SSL/TLS Certificate
SSL/TLS Certificate for s-d-s.com.pl
Expired- Issued by (CA)
- nazwa.pl sp. z o.o.
- Subject
- s-d-s.com.pl
- Valid from
- Dec 28, 2021
- Valid until
- Dec 27, 2022 (expired 1327 days ago)
- Public key
- RSA 2048-bit
- Serial
- 554D36B48F42460095EECE7D6FC9784D
- SHA-256 fingerprint
- B5:05:C9:03:C1:B9:30:CB:5C:17:4C:CC:81:30:80:5B:9C:CA:21:C1:B4:14:90:86:5A:A8:7C:B4:00:EA:E4:11
- Chain
- nazwaSSL → Certum Global Services CA SHA2 → 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.
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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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