Call sign
UNIQUE DESIGNATION FOR A TRANSMITTING STATION
Television call sign; Call letters; Radio call sign; Call signs; Callsign (radio); Call Letters; Amateur call letters; Call letter; Australian callsigns; W (call sign); Ham prefix; Broadcast call sign; Call Sign; Callsigns; Call-sign; International call sign; International call signs; Call signal; International callsign; Call name (call letters); Callsign
In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitter station. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise a station's identity.