Resolving

Does anyone know of a utility that will resolve a mac address of a Network Card to an IP address? Or if it can even be done?
Thank you for your time....
Have a great day!!

JD

 

Seems like it should be easy enough but not so.

Arp (command line utility) will give you the MAC if you specify an IP provided that the machine is on your network (subnet). Won't work across a router though.

If you have touched a machine (ping or network connection or whatever) on your network, you can do arp -a and display a list of all the IP addresses and their MAC.

Rarp (reverse arp) goes the other direction so will give the IP if you tell it the MAC. Unfortunately, I can't find a windows utility that will do Rarp for you. It's certainly not included with the windows IP utilities like arp is and for some reason, no one seems to have written one.

The only suggestion I can make is from a PC/server on your network, ping every address you have and then do arp -a and look thru the list. It will be sorted by IP address so it may take you a while though. Or do arp -a > c:\mac-list.txt and then you can open the text file and search it. Should be lots quicker if you have more than a few PCs.

 

Thanks for the Info. I will give those a try!!

Have a good one!!

JD