SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ref-herisau.ch
SSL/TLS Certificate
SSL/TLS Certificate for ref-herisau.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ref-herisau.ch
- Valid from
- May 28, 2026
- Valid until
- Aug 26, 2026 (33 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0627E8E96F4D2F258ECDF3FA891ED29CD27E
- SHA-256 fingerprint
- 4D:6D:86:3B:02:13:69:C8:6B:9D:4E:25:9A:D7:2A:09:C8:E5:3A:10:BD:DE:65:51:5D:C1:D1:82:4F:4F:7B:91
- Chain
- R13 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
This certificate has been served since Jul 21, 2026.
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Uptime
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DNS changes
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TLS certificate
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