SSL/TLS Certificate Lookup

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

ec2-3-38-234-227.ap-northeast-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-3-38-234-227.ap-northeast-2.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Amazon
Subject
*.koreanair.com
Valid from
Nov 30, 2025
Valid until
Dec 28, 2026 (144 days remaining)
Public key
RSA 2048-bit
Serial
0D61B44538247C664371FDF142C8BABA
SHA-256 fingerprint
96:BD:BA:62:24:D3:D6:EC:85:95:AF:D6:09:7A:A9:46:9F:AC:F4:E0:7F:CA:94:98:5D:53:DD:4D:76:37:54:59
Chain
Amazon RSA 2048 M04 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Subject Alternative Names (2)
*.koreanair.com, koreanair.com

Certificate Authority Authorization (CAA)

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

Never get surprised by ec2-3-38-234-227.ap-northeast-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-3-38-234-227.ap-northeast-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.

Monitor this certificate free

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