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ARP is intended for use by system administrators and is not generally useful as a way to track down computers and people on the Internet.

ARP works only within the small group of computers on a local area network (LAN), though, not across the Internet. Using "arp," you can in fact determine the MAC address of some computers from their IP address. In Windows, Linux and other operating systems, the command line utility "arp" shows this information. Most computers allow you to see the list of IP and MAC addresses that ARP has collected there. If your Linux OS does not have the ifconfig command, you may also use the ip addr command. The MAC address will be listed next to HWaddr. Open a terminal and use the ifconfig command. ARP is used to find the MAC address of a machine with a certain IP address, but you can't really go the other way around (technically a protocol called Reverse ARP exists, but it's never used in typical. Using ARP, each computer maintains a list of both IP and MAC addresses for each device it has recently communicated with. Instructions to properly identify the MAC address for each corresponding Operating System is listed below: Linux macOS Windows Linux. You can only ping an IP address, so what you're trying to do is find out what IP address belongs to a certain MAC Address and ping that IP. If this option is specified, then only the IP address and MAC address are displayed for each. The technology called ARP - Address Resolution Protocol included with TCP/IP makes it possible. The list will include the network and broadcast addresses. However, computers connected to the same TCP/IP local network can determine each other's MAC addresses. Simply stated, a computer's own hardware configuration determines its MAC address while the configuration of the network it is connected to determines its IP address. These two addresses originate from different sources. It is usually not possible for a person to get the MAC address of a computer from its IP address alone.