SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
fs-server.com
SSL/TLS Certificate
SSL/TLS Certificate for fs-server.com
Expired- Issued by (CA)
- Sectigo Limited
- Subject
- *.fs-server.com
- Valid from
- Apr 24, 2026
- Valid until
- Nov 8, 2026 (expired 4 days ago)
- Public key
- RSA 4096-bit
- Serial
- FA01457BF99EA353DD4C6F6AB2F68395
- SHA-256 fingerprint
- B3:8A:94:8A:9E:86:EE:70:BA:E8:47:BD:7F:01:DE:77:06:C2:A9:5E:86:1F:86:39:DB:18:8D:21:12:52:8C:1F
- 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.
This certificate has been served since Aug 28, 2026.
Never get surprised by fs-server.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch fs-server.com 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.