Determine Client WiFi Channel on Linux

If you have network with the same name on both 2.4 and 5 GHz it might not be obvious which network you are connected too. Well, on Linux, it’s easy enough - use iwlist utility.

If you run it with frequency as an argument you’ll get list of all supported channels followed by currently used channel.

iwlist frequency
 wlp4s0    32 channels in total; available frequencies :
           Channel 01 : 2.412 GHz
           Channel 02 : 2.417 GHz
           Channel 03 : 2.422 GHz
           Channel 04 : 2.427 GHz
           Channel 05 : 2.432 GHz
           Channel 06 : 2.437 GHz
           Channel 07 : 2.442 GHz
           Channel 08 : 2.447 GHz
           Channel 09 : 2.452 GHz
           Channel 10 : 2.457 GHz
           Channel 11 : 2.462 GHz
           Channel 12 : 2.467 GHz
           Channel 13 : 2.472 GHz
           Channel 36 : 5.18 GHz
           Channel 40 : 5.2 GHz
           Channel 44 : 5.22 GHz
           Channel 48 : 5.24 GHz
           Channel 52 : 5.26 GHz
           Channel 56 : 5.28 GHz
           Channel 60 : 5.3 GHz
           Channel 64 : 5.32 GHz
           Channel 100 : 5.5 GHz
           Channel 104 : 5.52 GHz
           Channel 108 : 5.54 GHz
           Channel 112 : 5.56 GHz
           Channel 116 : 5.58 GHz
           Channel 120 : 5.6 GHz
           Channel 124 : 5.62 GHz
           Channel 128 : 5.64 GHz
           Channel 132 : 5.66 GHz
           Channel 136 : 5.68 GHz
           Channel 140 : 5.7 GHz
         ^^Current Frequency=2.462 GHz (Channel 11)^^