ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database
whatismyip.cc - External IP Address lookup tool with option to scan the external IP address.
ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
System Scanner - Provides available through a web browser information about your computer system.
IP-API.com - Free IP Geolocation API - lookup any IP address
Skeebus - Skeebus is a macOS menu bar app that displays your current public IP address