SSL/TLS Certificate Lookup

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

ec2-44-228-201-124.us-west-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-44-228-201-124.us-west-2.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
admin.rollupapp.com
Valid from
Sep 30, 2026
Valid until
Dec 29, 2026 (45 days remaining)
Public key
RSA 2048-bit
Serial
0537F1C62E1B4BFE9430BA80D2B33263DEAC
SHA-256 fingerprint
D3:3B:55:20:2A:7C:5A:32:45:DF:B7:C5:20:0E:AB:8A:F7:02:71:D3:D4:62:80:FB:6B:D6:83:96:D9:C3:CE:F0
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (1)
admin.rollupapp.com

Certificate Authority Authorization (CAA)

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

Never get surprised by ec2-44-228-201-124.us-west-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-44-228-201-124.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.