....Ham radio operators dont have specific frequency assigments or use channel numbers...
The good news is that ham radio has an unparalled flexibility to make and maintain communiction under continually changing circumstances....
The bad news is that making contact with one specific station is hard because you may not know on what frequency to call them......
However, hams have found many ways around the latter problem with the result being an extraordinarily powerful and adaptive communication service....
73, de 9m2zak