In its rock-and-roll heyday, the station was known colloquially as "Famous 56" and employed the slogan "Rockin' in the Cradle of Liberty." Its 5000-watt transmitter enabled its signal to be heard as far away at times as Staten Island, the southernmost borough of New York City. During its top 40 years, WFIL also consistently showed strongly in the ratings books in nearby Wilmington, Delaware, where it has an excellent signal. In addition, WFIL was a popular listening choice in Reading and Allentown, both in Pennsylvania.