SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
b-data.ch
SSL/TLS Certificate
SSL/TLS Certificate for b-data.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- b-data.ch
- Valid from
- Aug 21, 2026
- Valid until
- Nov 19, 2026 (73 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 0550BCC3643FA3ECE568C8E0A58639B6592C
- SHA-256 fingerprint
- 21:F4:91:91:98:F9:56:22:E8:53:70:EE:11:09:87:9F:D1:FF:9E:F5:C7:9E:15:3C:32:B3:FA:17:6F:96:0B:F1
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 7, 2026.
Never get surprised by b-data.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch b-data.ch continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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