<P> Many countries have specific conventions for classifying call signs by transmitter characteristics and location . The call sign format for radio and television call signs follows a number of conventions . All call signs begin with a prefix assigned by the International Telecommunications Union . For example , the United States has been assigned the following prefixes : `` AAA '' -- `` ALZ '' , `` K '' , `` N '' , `` W '' . For a complete list , see international call sign allocations . </P>
<P> Many countries have specific conventions for classifying call signs by transmitter characteristics and location . The call sign format for radio and television call signs follows a number of conventions . All call signs begin with a prefix assigned by the International Telecommunications Union . For example , the United States has been assigned the following prefixes : `` AAA '' -- `` ALZ '' , `` K '' , `` N '' , `` W '' . For a complete list , see international call sign allocations . </P>
what do the w and k stand for in call letters
what do the w and k stand for in call letters
the United States
the United States