SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tekkotsu.org
SSL/TLS Certificate
SSL/TLS Certificate for tekkotsu.org
Expired- Issued by (CA)
- Internet2
- Subject
- corellia.srv.cs.cmu.edu
- Valid from
- Jun 23, 2017
- Valid until
- Jun 22, 2020 (expired 2271 days ago)
- Public key
- RSA 2048-bit
- Serial
- FFC7963F217A793E4B7E45C1C1539F9F
- SHA-256 fingerprint
- 85:54:B4:3D:15:85:57:D1:54:8C:0C:A7:E1:17:BD:C9:76:A6:98:DA:59:DC:D8:78:66:6E:3C:96:22:50:34:45
- Chain
- InCommon RSA Server CA → USERTrust RSA Certification Authority → AddTrust External CA Root
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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