SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
1a-rank.de
SSL/TLS Certificate
SSL/TLS Certificate for 1a-rank.de
Self-signed- Issued by (CA)
- Default SSL Certificate
- Subject
- Default SSL Certificate
- Valid from
- Jul 24, 2017
- Valid until
- Jul 23, 2020 (expired 2252 days ago)
- Public key
- RSA 2048-bit
- Serial
- 5976493B000E1123
- SHA-256 fingerprint
- AE:5C:14:CE:35:84:DA:95:1A:E9:C1:A4:1D:C3:AB:C6:C4:E9:1E:20:64:19:75:31:0E:89:D1:B8:32:C4:AF:45
- Chain
- Default SSL Certificate
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 7, 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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