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 zaber.pl
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- zaber.pl
- Valid from
- Nov 28, 2025
- Valid until
- Feb 26, 2026 (expired 147 days ago)
- Public key
- RSA 4096-bit
- Serial
- 05E5D36EE230D0F229D8B9C9DFCC8BC4005A
- SHA-256 fingerprint
- 72:3A:E1:77:3F:23:41:AC:07:2C:FB:31:F2:81:9D:01:16:BB:DA:AF:D8:BE:A8:FE:68:FF:94:B1:4F:BD:ED:1D
- Chain
- R12 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch zaber.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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