The hardware address (also known as the Ethernet, physical, or MAC address) is a 12 byte hexadecimal number that is unique to the ethernet card on your machine It will often be displayed in one of the following formats:
Sometimes leading 0's are omitted. For example, 08-00-2B-BC-31-DC and 8-0-2B-BC-31-DC refer to the same hardware address.
How to determine your computer's hardware address
On a PC running Windows NT, 2000, or XP
- Select: Start | Run and run cmd to start up a command shell.
- Type ipconfig /all
- The hardware address will be listed under "Physical Address"
On MacOS X
- Select Apple | Location | Network Preferences
- The hardware address will be listed on the bottom of the panel.
On MacOS 9.x
- Select Apple | Control Panels | TCP/IP
- Then select File | Get Info
- The hardware address will be listed on the panel
On Digital Unix
- Run /usr/sbin/netstat -ai
- The hardware address will be in the first line of output for each interface.
On IRIXThe hardware address is in plain text in the file /etc/ethers.
- Run /sbin/ifconfig -a
- The hardware address for each ethernet interface will be listed in the output after the string "HWaddr".
- Become root.
- Run /usr/sbin/ifconfig -a
- The hardware address for each ethernet interface will be listed in the output after the string "ether".