In 1940, Paley also joined forces with the journalist Edmund Chester at CBS Radio and Nelson Rockefeller at the Department of State's Office of the Coordinator of Inter-American Affairs to launch the imaginative Network of the Americas (La Cadena de Las Americas) in 1942.

[4][5] This innovative radio network beamed both news and cultural programming live to North and South America in support of cultural diplomacy and Pan Americanism in accordance with President Franklin Roosevelt's Good Neighbor policy during World War II.

[10] Westinghouse, which produced the first radio broadcast on November 2, 1920, with KDKA in Pittsburgh, Pennsylvania,[11] would later change its name to the original CBS Corporation,[12] and reorganize all of its radio properties (including its own Group W stations), as well as its outdoor advertising business, under the Infinity Broadcasting Corporation name.

[14] On December 31, 2005, Viacom spun out its motion picture and cable television assets, with the remainder maintained as the second CBS Corporation.

This group deal was granted FCC approval in mid-November 2007 after it faced regulatory review and numerous challenges for over a year, and officially closed on November 30.

"[19] On December 15, 2008, CBS Radio and Clear Channel Communications reached an agreement to swap seven stations.

In this deal, Clear Channel acquired WQSR in Baltimore, Maryland, KBKS in Seattle, Washington, KLTH and KXJM in Portland, Oregon, and KQJK in Sacramento, California; and CBS Radio would get KHMX and KLOL in Houston, Texas.

[24] On December 1, 2014, CBS Radio traded 14 stations—its Charlotte, North Carolina and Tampa Bay clusters as well as WIP (now WTEL (AM)) in Philadelphia—to Beasley Broadcast Group in exchange for WRDW-FM (now WTDY-FM) and WXTU in Philadelphia and WKIS, WPOW, and WQAM in Miami.

[25] In May 2016, Judge Percy Anderson ruled in favor of CBS Radio in a lawsuit filed by ABS Entertainment over the use of pre-1972 sound recordings, which are subject to common law state copyright and not federal law, on CBS Radio's oldies stations.

[17] In July 2016, CBS Radio filed for a planned IPO, which would have spun off the subsidiary as a separate, publicly traded company.

[29][30] The transaction closed on November 17, 2017,[31] ending the era of network-owned radio stations in America involving the original Big Three (ABC, NBC, and CBS).

However, CBS Sports Radio was continued to be broadcast by Entercom stations that carried its national programming.

In January 2006, rock star David Lee Roth, Rover's Morning Glory, and talk show host Adam Carolla replaced Stern in most major radio markets, and CBS Radio launched its new "Free FM" hot talk format in many of these markets.

[35] It also claimed that Stern "repeatedly and willfully" breached his contract with CBS, "misappropriated millions of dollars worth [of airtime]" for his own benefit and "fraudulently concealed" his performance-related interests in Sirius stock.

"[36] When a settlement was announced on May 26, 2006, Sirius gained exclusive rights to Stern's back catalogue of radio broadcasts at WXRK from November 1985 to December 2005, totalling almost 23,000 hours.

Over the years, CBS Radio expanded the AMP brand and the CHR/Top 40 format to its stations in Detroit, Boston, Orlando, New York City, Philadelphia, and lastly Dallas.

In 2005 and 2007 respectively, CBS dropped the St. Louis Cardinals from KMOX and the Pittsburgh Pirates from KDKA, ending two long relationships between the teams and their flagship stations.

In 2015, the Chicago Cubs moved its radio broadcasts to CBS property WBBM (AM) from its longtime home of WGN (AM).

They included: As part of the merger and in order to comply with FCC Regulations, CBS Radio divested WBZ and ownership of that station was transferred to iHeartMedia.