Heritage station

In commercial radio, heritage station is the term for an AM radio station that has broadcast a specific format for a sustained period of time, since its beginning; usually since the 1930s or 1940s, in some cases the 1920s. Also, the call letters will have remained the same for most of the station's life.

The "heritage station" term is sometimes used to describe some FM radio stations that have broadcast a specific format for a sustained time, usually since the 1970s or 1980s or earlier. The term is often used to describe Top 40 (CHR) FM stations that have retained the same format and branding for decades.

Heritage stations are usually recognized by the listening public as the dominant (or only) AM station broadcasting said format in each market. Heritage stations keep their call letters and/or brands intact for decades.

In most cases, there is only one heritage AM station per market. However, there may be more, in the case of multiple stations who have been competing for years. Some examples of major market heritage AM stations include KDKA Pittsburgh, WOI and WHO Des Moines, WBZ Boston, WSB Atlanta, WGN and WLS in Chicago, and KMOX St. Louis.