SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
edu-online.org
SSL/TLS Certificate
SSL/TLS Certificate for edu-online.org
Self-signed- Issued by (CA)
- Plesk
- Subject
- Plesk
- Valid from
- Apr 9, 2024
- Valid until
- Apr 9, 2025 (expired 494 days ago)
- Public key
- RSA 2048-bit
- Serial
- 20CBDF
- SHA-256 fingerprint
- 4F:04:D0:71:1A:BB:71:69:D8:30:7C:D1:AA:8A:57:1C:6C:FF:F6:D1:91:66:8F:B2:6E:6D:11:C1:16:44:8A:D5
- Chain
- Plesk
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Aug 13, 2026.
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Uptime
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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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