SSL/TLS Certificate Lookup

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

ec2-52-77-145-69.ap-southeast-1.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-52-77-145-69.ap-southeast-1.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Amazon
Subject
cmsitportal.org
Valid from
Apr 2, 2026
Valid until
Oct 16, 2026 (63 days remaining)
Public key
RSA 2048-bit
Serial
09C90B6A41A74A17C9009D23347997B3
SHA-256 fingerprint
2B:17:83:43:2F:D4:D2:AB:E1:0F:9D:FE:9E:27:5F:9F:61:C2:69:AC:65:20:12:63:CC:DD:93:56:BD:D0:72:7F
Chain
Amazon RSA 2048 M04 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Subject Alternative Names (3)
*.cmseducation.org, *.cmsitportal.org, cmsitportal.org

Certificate Authority Authorization (CAA)

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

Never get surprised by ec2-52-77-145-69.ap-southeast-1.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-52-77-145-69.ap-southeast-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.