SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
twojstyl-kostrzyn.pl
SSL/TLS Certificate
SSL/TLS Certificate for twojstyl-kostrzyn.pl
Valid- Issued by (CA)
- nazwa.pl Sp. z o.o.
- Subject
- twojstyl-kostrzyn.pl
- Valid from
- Mar 2, 2026
- Valid until
- Mar 2, 2027 (114 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 43A71DC1411EEE29B819BF48FAE69BC3
- SHA-256 fingerprint
- 93:EF:FE:68:14:3A:C6:C3:DA:73:D3:84:73:8A:60:DC:5D:0F:9A:48:91:D2:A1:C4:D9:01:39:8A:CD:59:1E:09
- Chain
- nazwaSSL DV TLS G2 R29 CA → Certum Trusted Root 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 17, 2026.
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Uptime
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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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