WRKO 860

-31 June 1922: WNAC goes the air at 1199 kHz (250 meters). Owned by John Shepard III, of Shepard Department Stores. Operated out of one of the Shepard stores.

-15 September 1922: WNAC licensed and frequency moved to 833 kHz.

-1924: Frequency changes to 1080 kHz

-1925: WNAC sister station, WNAB, bows on 1200

-04 February 1925: frequency change to 1070 kHz

-1927: frequency changes to 850 kHz

-June 1927: WBIS on

-31 August 1927: WNAB becomes WASN

-18 September 1927: WNAC becomes one of the original 16 CBS network stations

-1928: Frequency changes to 650 kHz

-February 1928: WNAC combines with WBIS, also owned by John Shepard

-11 November 1928: As part of Federal Radio Commission's frequency re-allocation, WNAC moves to 1230

-28 March 1929: WNAC moves transmitter to Quincy. WNAC combines with sister station WBIS on 1230

-25 May 1930: WNAC forms Yankee Network and signs WNBH New Bedford as first affiliate

-March 1934: WNAC begins "Yankee Network News" (Yankee News Service), a 15-minute, hourly newscast

-1934: WBIS deleted

-05 August 1936: Colonial Network is formed, based at WAAB 1410  Boston

-27 September 1936: WNAC loses its CBS affiliation and briefly becomes an NBC Red affiliate

-26 January 1937: The station's licensee name is changed to Yankee Network, Inc.

-26 January 1937: WNAC and WAAB ownership consolidated under The Yankee Network, Inc

-19 December 1937: WLAW (owned by the Lawrence Eagle-Tribune) signs on.

-January 1938: WNAC runs some NBC Red Network and Mutual Radio, as well as Yankee Network

-27 May 1939: Shepard stores begins W1XOJ, a 20,000 watt FM station listed as "The Yankee Network" in Paxton, MA on 43.0 megaHertz. Become WEOD.

-1948: WGTR moves to 99.1 mHz

-21 May 1948: WNAC-TV 7 goes on the air

-October 1948: WGTR changes to WNAC-FM, moving to 98.5 mHz, with 10,000 watts.

-1949: WNAC joins Mutual Radio Network

-24 June 1952: Stations purchased by General Teleradio, Inc.

-17 June 1953: WNAC purchases WLAW of Lawrence, Massachusetts, and moves WLAW to 1260 kHz. WNAC moves to 680. WLAW FM license (93.7) returned. 1260 license was sold to WVDA, which became WEZE

-12 December 1955: Stations purchased by RKO Pictures, Inc, as RKO Teleradio

-January 1957: RKO Teleradio renamed RKO General

-1960: WNAC-FM 98.5 became WRKO-FM, simulcasting WNAC full-time

-26 February 1967: WNAC ends news-based Yankee Network

-13 March 1967: WNAC becomes WRKO, and changes format to Top 40

-01 January 1969: WRKO-FM upgrades to stereo, becoming WROR, breaking away completely from WRKO. 

-01 May 1982: WNAC 7 in Boston was first station sold becoming New England Television's WNEV 

-1990: WNEV owner buys radio WHDH, and forms WHDH 7

-1991: WRKO/ WROR sold to Atlantic Ventures, which became American Radio Systems and merged into CBS

-1992: WHDH radio sold

-June 1993: WHDH TV 7 sold to Ed Asnin

-02 January 1994: WHDH tv drops CBS for NBC

-August 1998: WRKO 680 sold to Entercom