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Is it possible to search for all the mac addresses available in my network even if the computers are closed?

I used NetScan but it only show mac addresses for computers that are on.

BTW i`m running Windows 7 Pro.

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What do you mean with closed? Do you mean off? If that's the case, then it's not possible (except maybe the if the computers have 'wake by lan' on or something). – Bobby Nov 19 '09 at 15:41
Yes when they are off. Or maybe to search the root? – Vlad Patrascu Nov 19 '09 at 15:52
up vote 2 down vote accepted

If they are off? No, they have no way to respond.

Although you don't need a tool if they are on, ping the broadcast address for your network then grab them with arp:


Pinging with 32 bytes of data:

Reply from bytes=32 time<1ms TTL=64
Reply from bytes=32 time<1ms TTL=64
Reply from bytes=32 time<1ms TTL=64
Reply from bytes=32 time<1ms TTL=64

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

C:\>arp -a

Interface: --- 0x4
  Internet Address      Physical Address      Type          00-03-ff-a2-c0-95     dynamic          00-03-ff-46-df-1d     dynamic          00-03-ff-49-0c-30     dynamic          00-03-ff-46-99-37     dynamic          00-03-ff-46-95-05     dynamic          00-03-ff-46-de-1e     dynamic          00-03-ff-46-9f-c1     dynamic
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Thanks :D Anyway, I fixed my network but it`s good to know. – Vlad Patrascu Nov 19 '09 at 16:02
Forgot about <pre> being fussy with slashes. Thanks ~quack. – John T Nov 19 '09 at 16:08

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