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 cwia.pl
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- cwia.pl
- Valid from
- Nov 13, 2025
- Valid until
- Nov 13, 2026 (114 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 7943471F1A36404C01B3F5F8EB70D407
- SHA-256 fingerprint
- F0:F0:5E:DF:8E:F0:9C:5D:42:83:FD:F4:E9:FE:62:FB:09:D3:72:16:11:58:19:9B:5D:F1:9B:B3:70:CA:8E:30
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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