SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-3-139-249-158.us-east-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-3-139-249-158.us-east-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Amazon
- Subject
- *.horizon.31u.2kgames.net
- Valid from
- Nov 3, 2026
- Valid until
- May 21, 2027 (187 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 4411EC43232D31428ED576BE52F0DC84
- SHA-256 fingerprint
- 52:09:B7:D4:9B:19:61:0C:DA:06:66:3D:2C:90:A4:00:DC:4A:D3:AD:F5:AD:EC:B6:65:A3:BE:08:89:0A:A5:2E
- Chain
- Amazon RSA 2048 S23 → 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 ec2-3-139-249-158.us-east-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-3-139-249-158.us-east-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.