Hi you can easily find your ip address you can follow the below steps
If you want to check your internal ip address on Windows use the following methods:
1)start->Run->cmd->type ipconfig
2)If you want to check your External ip address you can visit this site Ip-details.com
Here you can search ip,IP Location,Country,Latitude and Longitude details and etc..
Change ip address
If you have dynamic IP, then change your IP address by following the steps:-
1)Go to Start->Run->Cmd->Press Enter..
Type in "ipconfig/release" for Current IP address and then type "ipconfig/renew" for New IP address.
2)Either follow step 1 or Simply restart or unplug your modem/router .
Doing either step 1 or 2 will change your Dynamic IP address.