SSL/TLS Certificate Lookup

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

ec2-18-142-29-147.ap-southeast-1.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-18-142-29-147.ap-southeast-1.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Amazon
Subject
decision.authz.apse1.f3.tpicapfusion.com
Valid from
Jun 18, 2026
Valid until
Jan 1, 2027 (53 days remaining)
Public key
RSA 2048-bit
Serial
059439C34A25097BF360DCF259D38B0D
SHA-256 fingerprint
6D:94:B4:F7:DC:2A:DB:73:A1:D4:B3:10:3F:27:B0:4D:5E:C7:F3:77:9D:8C:9F:92:F6:D1:50:A1:1D:61:4A:B4
Chain
Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Subject Alternative Names (1)
decision.authz.apse1.f3.tpicapfusion.com

Certificate Authority Authorization (CAA)

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

Never get surprised by ec2-18-142-29-147.ap-southeast-1.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-18-142-29-147.ap-southeast-1.compute.amazonaws.com continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

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