Mac OS Utilities
IP Broacaster displays your local (LAN) and internet (WAN) IP numbers in the menubar. Includes options to toggle WAN and LAN display.
IP Broadcaster also works in conjunction with IP Scanner to push the currently logged-in user name to the scanner. In other words: when scanning a network with IP Scanner, machines that also have IP Broadcaster running will show the currently logged-in user in addition the the machine's IP address.
Mac OS X 10.12.4 compatibility