How to find MAC address

Posted on 2004-11-04
Last Modified: 2013-11-13
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.
Question by:andreacadia
    LVL 95

    Expert Comment

    by:Lee W, MVP
    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.
    LVL 20

    Expert Comment

    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
    LVL 10

    Accepted Solution

    Hi andreacadia,
    Start>run>cmd>ipconfig /all . It is the Physical Address.
    LVL 10

    Expert Comment

    sorry guys, I didn't  "refresh" before I answered. =)
    LVL 8

    Expert Comment

    ping the appropriate ip-adress if it is on the same LAN segment and do arp -a... you see IP and corresponding MAC
    LVL 9

    Expert Comment

    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
    LVL 5

    Expert Comment

    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
    LVL 1

    Expert Comment

    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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