How Do I Find the MAC Address (Physical Address) of My PC running Vista?

Jacqueline Freeman - revised 08/2007

How do I find the MAC address (Physical Address) of my Ethernet adapter?

  1. Navigate to your Network and Sharing Center. Easiest: right-click Network, click Properties.

    Network may be on your Desktop or it may be on your Start Menu, depending on the configuration of Vista on your PC.

    You should see a window resembling this:


  2. Click View Status, which brings up this window:


  3. Now click Details to get a window like this:


  4. Jot down the Physical Address, which has 6 pairs of 2 numbers, like 01-22-C3-D4-E5-F6. Then you can Close all windows and browse to to register your computer for internet access.


  • Make sure you have the right connection. During the "free-for-all" period at the beginning of each semester you'll get an IP address even before you register. In the Details window of Step 3 above, few lines below Physical Address find IP Address; if it starts with "149.72" you're probably looking at the right Connection. If IP Address is missing or starts with something else, look for another Ethernet adapter on your system.

  • Your IPv4 Physical address NEVER looks like 00-00-00-00-00-00-00-E0 (way too many zeros, and too many numbers) or 44-44-45-44-44-44 (that's your modem). It ALWAYS has 6 pairs of 2 numbers, like 01-22-C3-D4-E5-F6.

  • Some PCs still have trouble getting an IP address even though you've registered the correct Physical address. Check that IPv6 is turned off: in the Local Area Connection Status window (see step 2 above) click Properties to bring up this window:

  • lan_properties

    Make sure there is NO CHECK in the box next to Internet Protocol Version 6 (TCP/IPv6), circled above. If there is, clear it by clicking once, then click OK to save your settings. You may need to reboot in order to totally clear the IPv6 setting.

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