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 cntd.eu
Self-signed- Issued by (CA)
- NetSurf Ltd
- Subject
- nacs.web.net-surf.net
- Valid from
- Jan 22, 2008
- Valid until
- Jan 21, 2009 (expired 6477 days ago)
- Public key
- RSA 2048-bit
- Serial
- E69118D91F07964F
- SHA-256 fingerprint
- 7A:39:A9:8F:3E:A3:A0:23:5D:13:C7:47:B3:B0:31:79:B0:36:5F:56:74:B1:C6:6F:D2:3F:87:01:9A:3A:90:70
- Chain
- nacs.web.net-surf.net
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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