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

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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 (35 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
Subject Alternative Names (2)
ref-herisau.ch, www.ref-herisau.ch

Certificate Authority Authorization (CAA)

The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).