SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-3-9-66-49.eu-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-3-9-66-49.eu-west-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Sectigo Limited
- Subject
- *.csstorage.co.uk
- Valid from
- Apr 21, 2026
- Valid until
- Nov 5, 2026 (105 days remaining)
- Public key
- RSA 2048-bit
- Serial
- B6A933611EB6A24F8E8CEBED5B2B307E
- SHA-256 fingerprint
- C2:35:BE:4C:CC:81:B4:95:A5:0B:FB:31:0E:E3:5D:52:A6:D9:EC:CF:6E:60:10:D1:48:6D:30:CC:3B:67:5E:1B
- Chain
- Sectigo Public Server Authentication CA OV 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 ec2-3-9-66-49.eu-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-3-9-66-49.eu-west-2.compute.amazonaws.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, 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.