SSL/TLS Certificate Lookup

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

ec2-44-241-37-79.us-west-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-44-241-37-79.us-west-2.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Amazon
Subject
*.cloud.samsara.com
Valid from
Jul 16, 2026
Valid until
Jan 29, 2027 (78 days remaining)
Public key
RSA 2048-bit
Serial
0C883358651290D508B499A6B467F4C9
SHA-256 fingerprint
CE:35:8D:BC:C2:3B:A7:6C:65:6E:1A:04:57:80:70:FC:3D:80:E1:6B:24:20:AC:33:C3:3C:FC:89:69:9C:A0:82
Chain
Amazon RSA 2048 M04 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Subject Alternative Names (2)
*.cloud.samsara.com, cloud.samsara.com

Certificate Authority Authorization (CAA)

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

Never get surprised by ec2-44-241-37-79.us-west-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-44-241-37-79.us-west-2.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.