SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
aklima-katowice.pl
SSL/TLS Certificate
SSL/TLS Certificate for aklima-katowice.pl
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- www.aklima-katowice.pl
- Valid from
- Oct 20, 2026
- Valid until
- May 7, 2027 (185 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 1F5D2B017085AFE920944E9534A5D38D
- SHA-256 fingerprint
- 5D:D0:FA:6E:16:39:71:E3:DC:0D:9D:E5:28:76:53:1D:E5:63:A1:8D:5B:DE:25:DC:5F:D8:AA:44:99:29:75:67
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Nov 1, 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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