What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

The 50.1 MHz to 50.125 MHz segment on the 6-meter band is designated in the band plan as a 'DX window.' This means it is voluntarily reserved for stations within the contiguous United States to attempt communication with DX stations (those outside the lower 48 states, including Alaska, Hawaii, and foreign countries). If local stations within the 48 states used this specific frequency block to chat with one another, their strong local signals would easily drown out the weak, long-distance DX signals trying to make it through. By restricting domestic-to-domestic contacts in this narrow sliver of the band, operators give everyone a fair chance to hear and work rare, distant stations during band openings.