How to Determine the Port Number on a Computer

Ports identify different types of information in order to direct Internet traffic. Different kinds of information have different ports. For example, when you send email, you’re using port 25, but when you surf the web you’re using port 80. Your computer uses port numbers, but it doesn’t have a port number. The number that identifies your specific computer is your IP address. IP addresses consist of four numbers—ranging from 0 to 255—separated with periods. Finding your IP address depends on your operating system.

Man typing on keyboard
credit: Hemera Technologies/AbleStock.com/Getty Images

Windows 7

Step

Find the network icon in the task bar on the bottom-right corner of your screen. It usually consists of two computers with a triangle, a circle or an “X.” When in doubt, hover the cursor over an icon and its name will appear. Click the network icon and select “Open Network and Sharing Center.”

Step

If you’re using a wireless connection, select “Wireless Network Connection.” If you’re using a wired connection, select “Local Area Connection.”

Step

Select “Details.” A window will show up with your IP address.

Windows XP

Step

Open the Start menu on the bottom left of your screen, right-click on “My Network Places” and select “Properties.”

Step

If you’re using a wireless connection, select “Wireless Network Connection.” If you’re using a wired connection, select “Local Area Connection.”

Step

Select “Support,” then “Details.” A window will show up with your IP address.

Mac Running OS X (version 10.3, 10.4, or 10.5)

Step

Go to the Apple icon on the top left of the screen and select “Location,” then select “Network Preferences.” A window will appear listing various connection types.

Step

If you’re using a wireless connection, select “AirPort.” If you’re using a wired connection, select “Ethernet.”

Step

Your IP address will appear under “Status.”