SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-52-9-133-36.us-west-1.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-52-9-133-36.us-west-1.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Amazon
- Subject
- con-srv-a-1.compass1.oobn.armfg.robotics.a2z.com
- Valid from
- Jun 11, 2026
- Valid until
- Dec 25, 2026 (48 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0E5BFC4DEE74A4818AF5129BBF3C686F
- SHA-256 fingerprint
- 08:4C:AD:62:57:CD:8A:E8:B1:AF:F9:D5:41:7E:9D:7A:D5:D9:FB:C3:6A:0D:9F:27:2D:60:44:5C:38:2E:D0:AC
- Chain
- Amazon RSA 2048 M04 → 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 ec2-52-9-133-36.us-west-1.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-52-9-133-36.us-west-1.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.