SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for f-c-s.at
Hostname mismatch- Issued by (CA)
- Sectigo Limited
- Subject
- mail.2bnet.at
- Valid from
- Sep 15, 2025
- Valid until
- Sep 15, 2026 (expires today)
- Public key
- RSA 2048-bit
- Serial
- 29759318765E956D01E3CEE3FFF01393
- SHA-256 fingerprint
- 88:89:39:52:FA:EC:7A:62:4E:33:E0:5E:A4:C3:67:FD:21:10:37:97:64:04:87:52:DB:FF:06:EA:2B:71:77:9E
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by f-c-s.at's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch f-c-s.at 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.