What is my IP? - Find out what your IP is. Do not hesitate to open wimip.
GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.
ipinfo.io - Simple IP address information.
whatismyip.cc - External IP Address lookup tool with option to scan the external IP address.
FindSiteIP.com - Website IP Address & Host Name Locator
Skeebus - Skeebus is a macOS menu bar app that displays your current public IP address