The callsign 'WPLN' comes from the original status of public radio in Nashville as a subsidiary of the public library, 'PLN' standing for Public Library of Nashville. Although the library and the radio station had developed separate operations and boards of directors well before the addition of the AM station, the FM radio had retained the 'PLN' moniker and it was deemed to be less potentially confusing for the AM station likewise to use it in preference to any other.