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?
53 Answers
If the modem has an assigned IP address, you can find the MAC address using the ping and arp command:
- Ping the device:
ping 1.2.3.4 - 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.
2Assuming you want the WAN MAC address. Many cable modems have a configuration or status page. For Comcast modems, it is typically 192.168.100.1. If your modem is also your router, it will be your LAN gateway address. Here's what I get when I open 192.168.100.1 on my cable modem:
Sorry, I don't know how to do this with powershell.
If the modem has a local address in the LAN you're connected to and you know it, then you could use the arp command to see its physical address.
arp -a lists all discovered addresses.
For more usage of the arp command, you can type arp /? in shell.
