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Find MAC address by IP address
Authored by: walsellers on Apr 04, '07 03:49:19PM

I had to hunt down a machine running DHCP today. I used the IPCONFIG tip to find the IP. Then, I used the "arp -a" command to get the MAC address. I matched it to the hardware by the sticker on the machine.

I think if the "arp -a" command didn't show the IP-MAC pairing, you could get it back into the list by pinging the IP address, then using arp to get the MAC address.

I'm pretty sure that this requires the other computer to be on the same subnet. Otherwise, arp might return the MAC of the gateway or router.



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