SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for bprog.pl
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.bprog.pl
- Valid from
- Jan 14, 2026
- Valid until
- Jan 14, 2027 (73 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 33F8FD99F21775DBE7CB4E67ED5E156A
- SHA-256 fingerprint
- D7:A5:C2:D1:87:DD:83:98:49:93:89:2D:77:B6:2C:CE:17:F6:46:BE:22:8D:34:00:66:F6:D8:10:94:D9:E1:AB
- 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.
This certificate has been served since Oct 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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