This tool allows you to quickly check if an IP address is part of the AWS network. It downloads the latest list of AWS Public IP Address Ranges provided by AWS, displays on a DataTables table, and by using the npm package Netmask can be searched for IP addresses that exist in any of the published IP ranges.
I built this tool to demo some code I documented in a blog post, "Adding a custom search filter to jQuery DataTables". I may try and extend this to search GCP, Azure, and others, but that will require some server-side scripting on my part. Another project for another day :-p