It also covers additional information about checking your router’s connection data for an IP address.

TCP/IPcomputer networks use both theIP addressesandMAC addressesof connected client devices.

Most computers let you see this list of addresses that ARP has collected.

Person finding a MAC address via Terminal app on an iMac

Alex Dos Diaz / Lifewire

Here is one example of how to find a MAC address using an IP address.

Start bypingingthe unit you want the MAC to address for.

Use a local address.

If your web connection is 10.0.1.x, use that number to ping.

Find the rig’s IP address in the list.

The MAC address is shown right next to it.

In this example, the IP address is 192.168.86.45, and its MAC address is 98-90-96-B9-9D-61.

Why Figure Out a MAC Address?

A single gear can possess multiple online grid interfaces and MAC addresses.