How to find MAC address

I am trying to secure my wireless network using MAC address filtering.  What is the easiest way to find out the MAC address of the Wireless cards on my clients.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Most cards have a sticker on them indicating the address.  Otherwise, You can use IPCONFIG /ALL (Assuming Win98 or later, including 2K, NT, XP).  If you want to get creative, then you can write a script to determine this.
My D-Link router lets me clone the MAC address of clients to use for filtering...if thats the brand of router you have you might want to see if you already have that built tells you the IP/MAC/NETBIOS name
Hi andreacadia,
Start>run>cmd>ipconfig /all . It is the Physical Address.

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sorry guys, I didn't  "refresh" before I answered. =)
ping the appropriate ip-adress if it is on the same LAN segment and do arp -a... you see IP and corresponding MAC
If you have a tremendous amount of clients just do is a neat little tool and free

thanks to the following web site

Download the zip file here

Create you a folder c:\whoisloggedon
Place nbtscan.exe and cygwin1.dll in c:\whoisloggedon
Edit your PATH statement:
example is XP:
right click on MY COMPUTER and click on ADVANCED tab.
at the bottom click on ENVIRONMENT VARIABLES button.
CAREFULL here.....DO not erase any current values. I you do.....hit cancel
In the system varialbles list (second box) locate PATH
Highlihgt Path and lick EDIT.
click in the VARIABLE VALUE field
Move to the end of the file and type this exactly
Click OK
CLick OK
Click OK
Reboot your machine (may not be needed)

Create you a file "whoisloggedon.cmd" with text editor and put this in it, changing the IP range to yours

nbtscan.exe -v

Now run that and see if you get the results like mentioned on the website.
No switces, like above, gives you
User logged on (if detectable)
MAc Address

Another little advantage is you can download the gui verion at this link and not have to create/run the command line version.
Download it
unzip the gui.exe file into c:\whoisloggedon
now, run gui.exe by double clicking it or adding a shortcut to it on your desktop
i think the above suggestion is good but way to many steps

angry ip scanner

enter your range, if linksys default is

after it finds all your alive hosts

right click and you can browse the folders, mac address, open ports etc

recommended by 3 out of 4 hackers and mothers
if your network is workking properly and if u have the ip address, u can ping these address and look the mac address with the command

arp -a

... this need windows 9X/2000/XP
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