The U.S. is divided into Zone I (roughly the northeastern quarter of the U.S. mainland, excluding the far northern areas), Zone I-A (California south of 40 degrees latitude, U.S. Virgin Islands, Puerto Rico), and Zone II (all other locations). The highest-power stations are class C in zone II, and class B in the others. There are no B stations in zone II, nor any C stations in the others. (See the list of broadcast station classes.) Canada is also divided in this manner, based on the most highly populated regions.
The US is divided into Zone I (roughly the northeastern quarter of the US mainland excluding the far northern areas) Zone I-A (California south of 40 degrees latitude US Virgin Islands Puerto Rico) and Zone II (all other locations) The highest-power stations are class C in zone II and class B in the others There are no B stations in zone II nor any C stations in the others (See the list of broadcast station classes) Canada is also divided in this manner based on the most highly populated regions