IpTrack

The application keeps track of the public and private IP addresses assigned to the handset and notifies the user each time it changes.
Keep in mind: if the public and private addresses are the same, the mobile phone could be reachable from Internet, for example with a ping, and if you have an application listening for data connection, everyone could connect to it!
The application works with Wifi and 2G/3G connection. The history of previous IP addresses is also available.