SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
pen-tester.net
SSL/TLS Certificate
SSL/TLS Certificate for pen-tester.net
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- autodiscover.pen-tester.net
- Valid from
- May 28, 2026
- Valid until
- Aug 26, 2026 (expired 7 days ago)
- Public key
- RSA 2048-bit
- Serial
- 05287C36AA6F7B3B97118D9EB45820011ABB
- SHA-256 fingerprint
- 82:0F:9F:14:ED:0B:9F:A8:BC:93:99:5E:86:0E:15:70:0D:88:F7:AB:FE:DA:DD:AB:9F:5F:9E:6D:A9:D8:D9:48
- Chain
- R13 → ISRG Root X1
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 27, 2026.
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TLS certificate
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