SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
columbusim.com
SSL/TLS Certificate
SSL/TLS Certificate for columbusim.com
Self-signed- Issued by (CA)
- H3
- Subject
- h3.hu
- Valid from
- Jul 25, 2020
- Valid until
- Jul 23, 2030 (1455 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 6E708EF0A2E9273936F9CFA3B3FAD92CB4BBD376
- SHA-256 fingerprint
- B9:C3:52:77:2E:AD:C9:15:3E:FB:BA:EC:B7:44:2D:A5:7E:9C:86:91:49:44:EE:C6:40:12:D8:69:33:21:7F:D3
- Chain
- h3.hu
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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