How to find MAC address - WintelGuy.com

How to find MAC address:

MAC address of your computer
Windows 2000 / XP / 2003 / 2008 / Vista / Windows 7
Windows Vista / Windows 7 / Windows 2008 (Full Installation only)
LINUX

MAC address of a system connected to the same subnet as your computer
Windows 2000 / XP / 2003 / 2008 / Vista / Windows 7
LINUX

MAC address of your computer

Windows 2000 / XP / 2003 / 2008 / Vista / Windows 7

Open a Command Prompt window by clicking the Start button, clicking Programs or All Programs, clicking Accessories, and then clicking Command Prompt.
In the Command Prompt window type ipconfig /all
Find the Physical Address line under the section that describes your network adapter. MAC address is listed as six groups of two hexadecimal digits, separated by hyphens (-).

C:\Documents and Settings\admin>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : mypc
   Primary Dns Suffix . . . . . . . : domain.local
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : domain.local

Ethernet adapter Wireless Network Connection:

   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Intel(R) PRO/Wireless 3945ABG Network Connection
   Physical Address. . . . . . . . . : 00-13-02-80-92-7A
   Dhcp Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IP Address. . . . . . . . . . . . : 192.168.0.3
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.0.1
   DHCP Server . . . . . . . . . . . : 192.168.0.1
   DNS Servers . . . . . . . . . . . : 192.168.0.1
   Lease Obtained. . . . . . . . . . : Sunday, February 15, 2008 3:19:03 PM
   Lease Expires . . . . . . . . . . : Friday, February 20, 2008 3:19:03 PM

Ethernet adapter Local Area Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Description . . . . . . . . . . . : Intel(R) PRO/1000 PL Network Connection
   Physical Address. . . . . . . . . : 00-0E-7B-89-C4-E0

Ethernet adapter Local Area Connection 2:

   Media State . . . . . . . . . . . : Media disconnected
   Description . . . . . . . . . . . : Bluetooth Personal Area Network from TOSHIBA
   Physical Address. . . . . . . . . : 00-03-7A-F3-6C-E7

Windows Vista / Windows 7 / Windows 2008 (Full Installation only)

Open a Command Prompt window by clicking the Start button, clicking Programs or All Programs, clicking Accessories, and then clicking Command Prompt.
In the Command Prompt window type getmac (or getmac /v if your computer has more than one network adapter).
MAC address is listed as six groups of two hexadecimal digits, separated by hyphens (-) in the beginning of the line.

C:\Users\admin>getmac
Physical Address Transport Name
=================== ==========================================================
00-21-85-0C-52-A3 \Device\Tcpip_{4B89E525-B2FE-4E02-B769-D671265BBDE6}

LINUX

Open a terminal or console window.
In the window type ifconfig
MAC address is marked as HWaddr and listed as six groups of two hexadecimal digits, separated by colon (:).

root@host:~# ifconfig
eth1 Link encap:Ethernet HWaddr 00:10:5A:0D:5A:A5
   inet addr:192.168.0.2 Bcast:192.168.0.255 Mask:255.255.255.0
   inet6 addr: fe80::210:5aff:f00d:5bb5/64 Scope:Link
   UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
   RX packets:1206866 errors:54423 dropped:0 overruns:0 frame:81536
   TX packets:941228 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:332783971 (317.3 MiB) TX bytes:214601237 (204.6 MiB)
   Interrupt:10 Base address:0xa000

lo Link encap:Local Loopback
   inet addr:127.0.0.1 Mask:255.0.0.0
   inet6 addr: ::1/128 Scope:Host
   UP LOOPBACK RUNNING MTU:16436 Metric:1
   RX packets:1573 errors:0 dropped:0 overruns:0 frame:0
   TX packets:1573 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:0
   RX bytes:99765 (97.4 KiB) TX bytes:99765 (97.4 KiB)

MAC address of a system connected to the same subnet as your computer

Windows 2000 / XP / 2003 / 2008 / Vista / Windows 7

Open a Command Prompt window by clicking the Start button, clicking Programs or All Programs, clicking Accessories, and then clicking Command Prompt.
In the Command Prompt window type ping <remote_system>
Replace <remote_system> with an IP address of the system you want to find MAC address.
In the same Command Prompt window type arp -a
MAC address is listed in the Physical Address column as six groups of two hexadecimal digits, separated by hyphens (-).

C:\Documents and Settings\User>ping 192.168.0.1

Pinging 192.168.0.1 with 32 bytes of data:

Reply from 192.168.0.1: bytes=32 time<1ms TTL=127
Reply from 192.168.0.1: bytes=32 time<1ms TTL=127
Reply from 192.168.0.1: bytes=32 time<1ms TTL=127
Reply from 192.168.0.1: bytes=32 time<1ms TTL=127

Ping statistics for 192.168.0.1:
   Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
   Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\Documents and Settings\User>arp -a

Interface: 192.168.0.101 --- 0x2
Internet Address Physical Address Type
192.168.0.1      00-17-9a-46-7c-a3 dynamic

LINUX

Open a terminal or console window.
In the window type ping -c1 <remote_system>
Replace <remote_system> with an IP address of the system you want to find MAC address.
In the same window type arp
MAC address is listed in the HWaddress column as six groups of two hexadecimal digits, separated by colon (:).

root@host:~# ping -c1 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_seq=1 ttl=127 time=4.22 ms

--- 192.168.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 4.223/4.223/4.223/0.000 ms
root@host:~# arp
Address HWtype HWaddress Flags Mask Iface
192.168.0.1 ether 00:17:9A:46:7C:A3 C eth1