IP-Toolbox.com is described as 'displays your public IP address aswell as other related information'. There are eight alternatives to IP-Toolbox.com, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Chrome OS. The best alternative is ShowIP, which is both free and Open Source. Other great sites and apps similar to IP-Toolbox.com are Geo IP Tool (Free), Show My IP (Free), geoiplookup.net (Free) and What is My IP Live (Free).
Show My IP will display the local and public IPv4 and IPv6 addresses of all you network interfaces. It also shows which public IPs (v4 and v6) are used by default for accessing the internet. The IPs are automatically updated on network changes.
Whatismyip.live shows your real or VPN IPv4 and IPv6 just by visiting the website home page or by downloading our mobile app. Both IPv4 and IPv6 comes with complete IP geolocation and other IP tools such as IP whois check, DNS check, Reverse IP lookup, Proxy check and much more.
System Scanner is an web application that will show you what information is available through a browser about your system, including hardware and software, IP-address, broadband speed, security problems (if any), geolocation and much, much more.