SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-52-199-172-141.ap-northeast-1.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-52-199-172-141.ap-northeast-1.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- handbook.jp
- Valid from
- May 31, 2026
- Valid until
- Aug 29, 2026 (36 days remaining)
- Public key
- EC 256-bit
- Serial
- 0629F418E1C4BFEFD6D7B10D89E2B441A48B
- SHA-256 fingerprint
- 33:FC:EE:AF:7B:A1:7E:82:05:DF:A6:79:F1:4A:76:11:60:D7:7E:0A:55:87:CC:E5:C0:FA:B5:49:56:8D:18:AF
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
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
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TLS certificate
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