SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
1-data.ch
SSL/TLS Certificate
SSL/TLS Certificate for 1-data.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 1-data.ch
- Valid from
- Aug 7, 2026
- Valid until
- Nov 5, 2026 (84 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05CBE7FEA2228C6FC50EFAC7226C54B558FD
- SHA-256 fingerprint
- 22:4E:B0:FD:D7:B1:1F:06:00:A3:1F:7F:88:9F:11:6F:14:1D:AE:F3:CF:67:82:48:D3:30:52:8A:E5:F1:85:DE
- 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 1-data.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 1-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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