SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bit-sa.pl
SSL/TLS Certificate
SSL/TLS Certificate for bit-sa.pl
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.bit-sa.pl
- Valid from
- Sep 9, 2026
- Valid until
- Mar 27, 2027 (195 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 64F4420DFF021D6CA21654444C6E804D
- SHA-256 fingerprint
- 8A:3E:02:93:91:75:07:62:9B:CB:21:92:17:9D:DA:F0:C5:B5:A5:9D:58:3B:0D:D3:DD:A3:EC:D1:B9:F7:0A:1E
- Chain
- Certum DV TLS G2 R39 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 (Asseco Data Systems S.A.) to one of these identifiers.
This certificate has been served since Sep 6, 2026.
Never get surprised by bit-sa.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch bit-sa.pl continuously, notifying you the moment anything moves across all three signals:
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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