In those days, there was not as much "stuff" in the airwaves, and you could hear a bit more than you can now. 1923 was not without stations interfering with each other in the far reaches of the country, but those stations were crowded in the the area of 360 meters primarily.
By 1936, those numbers exploded. I have a listing on my website that I scanned- It is an original document that Philco included with their sets. it gives you an idea of how fast the medium grew.
:I have a old home brew radio with 3 WD-11 tubes that have a stamp that says the Mcgraw co. Omaha Nebraska with the date 1923 on it, it works fairly well and i can get about 8 stations on it, my question is how many radios stations were even on the air near Omaha,Ne that you could pick up in 1923?