What kind of OS do you have?Finding computer ip command it differ from OS.
If it windows OS then follow these steps:
Start---->run---->cmd---->type ipconfig
and then click enter it will display your computer ip address.
Or else If you have Linux OS then follow this command
/sbin/ifconfig
To know your Network ip address visit IP-Details.com here it display your ISP,location,country and so on..