SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

ec2-13-159-1-143.ap-northeast-1.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-13-159-1-143.ap-northeast-1.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Amazon
Subject
otani-shokai.org
Valid from
Jun 5, 2026
Valid until
Dec 19, 2026 (149 days remaining)
Public key
RSA 2048-bit
Serial
0C0778D0D82AF8E6021B0D23843C7D4A
SHA-256 fingerprint
AF:8D:E8:66:66:7E:BC:3C:64:3B:14:CE:1D:66:E2:63:C4:CA:51:81:5A:9B:41:22:5D:76:59:9C:BF:27:52:F6
Chain
Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Subject Alternative Names (2)
*.otani-shokai.org, otani-shokai.org

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by ec2-13-159-1-143.ap-northeast-1.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-13-159-1-143.ap-northeast-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, 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.