How to find MAC addresses on network?

Jason Crain jason at
Thu Jan 22 22:58:36 UTC 2009

Chris G wrote:
> Is there a (reasonably) straightforward way of finding the MAC
> addresses of systems (well, strictly, interfaces) on a network?
> arping works for some but not all of my hardware, presumably some
> things (like my HP printer) don't respond to arping.  What can I use
> to find the MAC address of the printer?

arp-scan works well:

~$ sudo arp-scan
Interface: eth0, datalink type: EN10MB (Ethernet)
Starting arp-scan 1.6 with 256 hosts 
(     00:12:17:44:0a:3b       Cisco-Linksys, LLC   00:1f:d0:8d:64:24       (Unknown)

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