How to check what wifi channels are being highly utilised

My Virgin Media wifi here in the Uk is suddenly playing up and dropping and reconnecting.  I have changed channels both on the 2.4ghz and 5ghz and it is having little effect.  Leaving aside the discussion about position of the cable modem router etc, my question is simple.

What is the command line to check what channel numbers are being used by neighbouring houses and generally what channel numbers are stronger in wavelength and in performance i.e. 1-13 for 2,4ghz and the longer list for 5ghz.

I need the command line on a mac and windows pc.  thx
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JohnBusiness Consultant (Owner)Commented:
Get inSSider Personal (Metageek). It will tell you what is around and on what channel along with signal strength. I use this myself.
Dave BaldwinFixer of ProblemsCommented:
I use Nirsoft's Wireless Net View.  I have up to 58 wireless networks running here at any one time.
Shaun VermaakTechnical SpecialistCommented:
I need the command line on a mac and windows pc.  thx
This Windows command will show available connections and channels used
netsh wlan show networks mode=bssid

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Craig BeckCommented:
To do it on a Mac, assuming you have Yosemite or newer you'll need to make a symbolic link to the airport utility...

sudo ln -s /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport /usr/local/bin/airport

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Once you've done that, you can invoke the airport utility using:

airport -s

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thuy hang vuCommented:
You can use InSSIDer to look for the Best Wifi Channel.

You need to locate an area with some empty space, or a quiet channel, and important its number down. The best wifi channel you selected will be your network’s new home. To change wifi channel on your router, you need to connect to your router’s admin interface
you can learn more how to find best wifi channel in this tutorial:
Tip: The best Wireless channel are 1, 6 and 11.
Craig BeckCommented:
You can use InSSIDer to look for the Best Wifi Channel.

The OP asks...

What is the command line to check what channel numbers are being used
u587162Author Commented:
Do people often have to keep changing their channel number every few weeks/months.  It's crazy as lay people wouldnt have a clue to start fiddling with their router settings to do this or run command line prompts or software to check which channels are busy.
Dave BaldwinFixer of ProblemsCommented:
I'd say that most people never change their WiFi channels.  Only people like us who use software to find the least used channel in our area.
Natty GregIn Theory (IT)Commented:
Command line given above I use Wi-Fi channel scanner tells me channel and signal strength so I can decide which shannel is least used but then you want to know which channel overlap so you don't get caught in the middle with a channel that drop signal because it may overlap with one or more channel
Craig BeckCommented:
OP clearly asks for command line tools only.
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