Windows – How to determine mac address of a modem on Windows 7

cable-modemnetworkingpowershellwindows 7

For a validation process I need to know the MAC address of a cable modem. (I do not need to know the MAC address of the network adapter.) The cable modem though is placed somewhere hardly accessible, so I want to avoid physically touching it to read its sticker.

What I do have is a Windows 7 machine connected to it, so I want to look up its MAC address via power shell. How do I achieve that?

Best Answer

If the modem has an assigned IP address, you can find the MAC address using the ping and arp command:

  1. Ping the device: ping 1.2.3.4
  2. View arp table: arp -a

The MAC address information is pulled by the ping command, and the info is temporarily stored in your NIC. The arp command is to show the stored information.