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# Saturday, 20 March 2010

MAC Addresses are unique to the networkcard and can be used to identify your PC.

You can view your MAC addresses by typing ipconfig /all

Ethernet adapter Loopback:
  Connection-specific DNS Suffix  . :
  Description . . . . . . . . . . . : Microsoft Loopback Adapter
  Physical Address. . . . . . . . . : 02-00-4C-4F-4F-50
  DHCP Enabled. . . . . . . . . . . : No
  Autoconfiguration Enabled . . . . : Yes
  IPv4 Address. . . . . . . . . . . : 111.111.111.111(Preferred)
  Subnet Mask . . . . . . . . . . . : 255.255.255.0
  Default Gateway . . . . . . . . . : 0.0.0.0
  DNS Servers . . . . . . . . . . . : 111.111.111.111
  NetBIOS over Tcpip. . . . . . . . : Enabled

to view other machines MAC addresses you can ping them and then type arp -a which wil result in a list similar to this:

Interface: 192.168.1.200 --- 0xb
  Internet Address      Physical Address      Type
  192.168.1.1           00-04-0e-f6-17-55     dynamic
  192.168.1.2           00-04-0e-aa-88-ab     dynamic
  192.168.1.3           00-01-db-09-55-42     dynamic

The first three bytes identify the manufacturer of the card, the remainder identifies the card itself. 

you can look those up here:

 I wrote a small tool that parses a file and returns the manufactuer

MACTool.zip (632.92 KB)
Saturday, 20 March 2010 12:15:35 (Mitteleuropäische Zeit, UTC+01:00)  #    -
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