SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
room3.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for room3.co.kr
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- room3.co.kr
- Valid from
- Apr 15, 2026
- Valid until
- Jul 14, 2026 (expired 29 days ago)
- Public key
- RSA 2048-bit
- Serial
- 064F36FDA51322BD27E7B9E52C049400BF15
- SHA-256 fingerprint
- 07:E7:B3:B6:37:2C:66:6D:5A:76:F1:8D:40:F1:45:5D:79:59:9B:E2:E8:B6:E8:86:0B:CE:81:13:F3:33:B0:C9
- Chain
- R12 → 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 12, 2026.
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Uptime
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DNS changes
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TLS certificate
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