Your computer's network address, or IP address, is a series of numeric values that represent the location of the machine on the network. An IP address is assigned to your computer by a network administrator. If you connect to the Internet, your Internet service provider (ISP) assigns an IP address to your computer. You can find the IP address assigned to your Windows machine using the DOS command prompt.
Click the Windows "Start" button and select "Run." In the text box display, enter "cmd" to open the DOS command prompt window.
Type "ipconfig" into the text box and press the "Enter" key. This shows you the basic information for your network card including the IP address.
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Type "iconfig/all" into the command prompt to see additional detail. The "/all" switch shows you details for all the network cards on the computer.
Scroll down the list of network adapters to the one labeled "Local Area LAN Connection." This is the adapter for the network card. In the section labeled "IP Address" you will see the computer's address.