SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-3-9-140-61.eu-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-3-9-140-61.eu-west-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Amazon
- Subject
- *.userundle.com
- Valid from
- Sep 15, 2026
- Valid until
- Mar 31, 2027 (141 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0CB591E1F4A30880F206F303CF2BFE0E
- SHA-256 fingerprint
- 0A:B2:E9:30:2A:45:AC:E7:6E:89:79:A0:03:DD:C4:6C:5D:00:FE:31:D3:44:03:07:2C:3F:C7:0E:23:66:D2:34
- Chain
- Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-3-9-140-61.eu-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-3-9-140-61.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, 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.