SSL/TLS Certificate Lookup

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

ec2-35-84-171-17.us-west-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-35-84-171-17.us-west-2.compute.amazonaws.com

Untrusted chain
Issued by (CA)
AWS EKS
Subject
kube-apiserver
Valid from
Nov 5, 2026
Valid until
Nov 5, 2027 (361 days remaining)
Public key
RSA 2048-bit
Serial
2789AA5551A5D62F
SHA-256 fingerprint
E1:DB:0D:C0:94:5B:C4:96:89:AA:91:7A:88:A3:BD:43:4C:B4:45:7B:9E:81:BB:67:DC:2D:F9:E7:F8:B7:94:02
Chain
—
Subject Alternative Names (6)
2908351e238d3b4c59e7a43722a17f54.gr7.us-west-2.eks.amazonaws.com, ip-172-16-112-66.us-west-2.compute.internal, kubernetes, kubernetes.default, kubernetes.default.svc, kubernetes.default.svc.cluster.local

Certificate Authority Authorization (CAA)

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

This certificate has been served since Oct 4, 2026.

Never get surprised by ec2-35-84-171-17.us-west-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-35-84-171-17.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.