SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
scientific-info.cern
SSL/TLS Certificate
SSL/TLS Certificate for scientific-info.cern
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- www.cern.ch
- Valid from
- Nov 10, 2026
- Valid until
- May 27, 2027 (194 days remaining)
- Public key
- RSA 2048-bit
- Serial
- C0FF21C1FDAF34BE4564AC5C756F4C51
- SHA-256 fingerprint
- 33:46:9C:02:33:11:E1:10:4B:3D:84:F4:4A:06:8C:09:39:03:6B:B4:A3:BF:D3:E2:28:93:95:54:65:E6:16:09
- Chain
- Sectigo Public Server Authentication CA OV R36 → Sectigo Public Server Authentication Root R46
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 12, 2026.
Never get surprised by scientific-info.cern's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch scientific-info.cern 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, CNAME, TXT 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.