A year ago, I reported that I could receive a stunning 13 Wifi networks at my flat. Since then, the number has risen even further! When I checked this time, I was able to detect over 25 access points, not counting secondary SSIDs of some access points and those networks that could be received but not decoded correctly due to their weak signal strength. Channel 11 is a hot place with over 10 access points sending out their signals in this area. A place in the spectrum definitely to be avoided as at least one access point sends a continuous high bitrate broadcast, probably a TV or video stream. The screenshot on the left, taken with WiSpy/Chanalyzer, shows the distribution of the networks on the different channels an how strong they can be received. My own network is the red curve on the left on channel 1, with at least three or four additional networks using the same channel. However, compared to what's going on at channel 11, this spot in the spectrum can be considered as being almost calm.