SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ref-sargans.ch
SSL/TLS Certificate
SSL/TLS Certificate for ref-sargans.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ref-sargans.ch
- Valid from
- Jun 23, 2026
- Valid until
- Sep 21, 2026 (44 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 055FA86CCE5C53DDEA6BF34B3F1575D15ED6
- SHA-256 fingerprint
- 8F:E6:49:14:7F:49:CE:9D:47:59:51:76:FB:AD:FC:12:72:FC:E1:14:C8:A3:43:90:A2:F7:F9:68:E6:42:C3:90
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ref-sargans.ch's certificate expiring
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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