SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
1-class.ch
SSL/TLS Certificate
SSL/TLS Certificate for 1-class.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 1-class.ch
- Valid from
- Aug 7, 2026
- Valid until
- Nov 5, 2026 (86 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05836EFED3E962C37E52B730E2D3E831E7D3
- SHA-256 fingerprint
- 51:EE:BC:D0:79:10:02:CD:EA:75:13:3C:60:94:F0:9E:0F:8D:1C:B8:8E:61:62:B1:6F:57:4A:24:AE:79:EB:87
- 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.
This certificate has been served since Aug 2, 2026.
Never get surprised by 1-class.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 1-class.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.