SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
nfz-krakow.pl
SSL/TLS Certificate
SSL/TLS Certificate for nfz-krakow.pl
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.nfz-krakow.pl
- Valid from
- Oct 6, 2025
- Valid until
- Oct 6, 2026 (63 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 30D68B37D18BB3959B416E47D382C413
- SHA-256 fingerprint
- 7A:BC:A9:FD:83:AB:17:24:E1:36:90:DA:17:49:D2:A4:7F:42:96:47:D0:58:9E:1F:2D:79:C9:7C:C7:69:20:A2
- Chain
- Certum OV 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.
Never get surprised by nfz-krakow.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch nfz-krakow.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.