SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
za-ps.edu.pl
SSL/TLS Certificate
SSL/TLS Certificate for za-ps.edu.pl
Self-signed- Issued by (CA)
- American Power Conversion Corp
- Subject
- ZA1130003586
- Valid from
- May 28, 2026
- Valid until
- May 28, 2027 (290 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 5778D15243C97C31
- SHA-256 fingerprint
- A4:1F:31:81:69:85:EB:1E:7A:AF:DD:51:D9:6F:1D:E5:DA:DE:76:77:61:08:52:45:BA:FB:27:B9:3F:36:96:6A
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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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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