SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sfr-ag.ch
SSL/TLS Certificate
SSL/TLS Certificate for sfr-ag.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sfr-ag.ch
- Valid from
- Aug 25, 2026
- Valid until
- Nov 23, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0507AFDB83B4BC0267968B8323A32344A528
- SHA-256 fingerprint
- 4A:45:70:85:A6:EA:EF:67:2D:5B:A5:77:0C:96:2C:BF:60:6B:C2:15:AB:FD:8A:C2:60:F8:16:3D:F5:09:57:A3
- Chain
- YR2 → Root YR → 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 30, 2026.
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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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