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The wifi radio space is crowded, so scanning which channel(s) are the least crowded is advisable.

What is a good tool to do this task? It should

  • List all nearby AP's with radio channel, SSID, MAC Adress and encryption type
  • Scan both 2.4Ghz (802.11b/g/n) and 5Ghz(802.11a/n) frequencies
  • Be compatible with Windows 7 and 8
  • Be free or very cheap
1

WifiInfoView is another usual wifi scanner on Windows:

It does

  • List all nearby AP's with radio channel, SSID, MAC Adress and encryption type
  • Scan both 2.4Ghz (802.11b/g/n) and 5Ghz(802.11a/n) frequencies
  • Be compatible with Windows Vista, Windows 7, Windows 8, and Windows Server 2008. Both 32-bit and x64 systems are supported.
  • Be free (and portable)

And it's NirSoft quality.

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1

inSSIDer is a wifi scanner on Windows and Mac.

It does

  • Cost $20
  • List all nearby AP's with radio channel, SSID, MAC Adress and encryption type
  • Scan both 2.4Ghz (802.11b/g/n) and 5Ghz(802.11a/n) frequencies
  • Be compatible with Windows 7, Windows 8, and Mac.

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