Entercom Communications Corp., incorporated on October 21, 1968, is a radio broadcasting companies in the United States. The Companys operates with a nationwide portfolio of 23 markets: San Francisco, Boston, Seattle, Denver, Portland, Sacramento, Kansas City, Indianapolis, Milwaukee, Austin, Norfolk, Buffalo, New Orleans, Memphis, Providence, Greensboro, Greenville/Spartanburg, Rochester, Madison, Wichita, Wilkes-Barre/Scranton, Springfield (MA) and Gainesville/Ocala. It focuses on providing compelling content in the communities the Company serves to enable the Company to offer it advertisers an effective marketing platform to reach a targeted local audience. The primary source of revenues for its radio stations is the sale of advertising time to local, regional and national spot advertisers and national network advertisers. The Companys stations are typically classified by their format, such as news, talk, classic rock, adult contemporary, alternative and country, among others. A stations format enables it to target specific segments of listeners sharing certain demographics. Advertisers and stations use data published by audience measuring services to estimate how many people within particular geographical markets and demographics listen to specific stations.