Every computer connected to the Internet has is a unique numeric IP address, presented usually in the dot-decimal form (e.g. 188.8.131.52). Local area network (LAN) is a network that comprises a few computers within a limited area; for instance, two or three computers in the same household. LAN is typically organized using a network router that shares an Internet connection between two or more computers. LAN IP is a computer IP address assigned by the router to communicate within LAN only.
Click the "Start" button in the lower left-hand corner of the screen.
If you use Windows Vista, type "cmd" and press "Enter." In Windows XP, click "Run" and then type "cmd" followed by "Enter" to open the command prompt window.
Type "ipconfig" and press "Enter."
Read the program output. The line starting with "IPv4 Address," contains the LAN IP. For example, "IPv4 Address. . . : 184.108.40.206"