SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ger-lider.edu.pl
SSL/TLS Certificate
SSL/TLS Certificate for ger-lider.edu.pl
Self-signed- Issued by (CA)
- ger-lider.edu.pl
- Subject
- ger-lider.edu.pl
- Valid from
- Aug 23, 2022
- Valid until
- Aug 23, 2023 (expired 1082 days ago)
- Public key
- RSA 2048-bit
- Serial
- 5F5F6E72
- SHA-256 fingerprint
- 28:74:CE:DC:22:53:5C:82:97:B1:7B:AA:13:8C:2A:48:22:5E:71:5E:CB:40:92:75:3E:80:B4:84:88:73:6D:48
- Chain
- ger-lider.edu.pl
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ger-lider.edu.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ger-lider.edu.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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