Live example: http://mongr.co/sub/ipaddress/
Retrieves client ip address and displays in browser.
This is not a reliable or secure way to identify/track a user, it can be easily stumped with a proxy or vpn.
12-16-15: added google maps call to illustrate geo-data
ipinfo.io
Google Maps
email me: mrbenpappas@gmail.com
github: https://github.com/mrpappas