KBS Cool FM

TBC Radio Era

• 26 June 1965: Tongyang Broadcasting Corporation (동양 방송 공사) (Former body of JTBC) was launched.
• 27 June 1965: Radio Seoul Broadcasting (라디오 서울 방송) HLCD 639 kHz Started broadcasting.
• 1966: Renamed as TBC Radio. 89.1 MHz FM Repeater (Standard FM) launched. Callsign changed to HLKC/HLKC-SFM
• 1970: TBC Radio Started South Korea's First Stereo FM Broadcast.
• 1 December 1980: TBC Radio forced to be merged into KBS Radio by the special law of Chun Doo-hwan as president of military authorities.

KBS 2FM Era

• 25 December 1980: Relaunched as KBS 2FM (KBS 제2FM) with a Trot and Popular Music format. Callsign changed to HLKC-FM and 639 kHz AM Repeater stopped broadcasting with the frequency used to form KBS Radio 3. Airing of advertisements where abolished and started airing selected shows nationwide through Cross-Broadcast with the KBS Local FM Network (composed of former provincial TBC Radio stations) along with KBS 1FM.
• 24 December 1988: KBS 2FM Started Partial 24-hour Broadcast (Monday~Friday 24-hours and Saturday~Sunday 18-hours).
• 30 May 1990: Transmission power increased (TPO:1 kW ERP:173.5 kW → TPO:10 kW ERP:350 kW)
• 1 October 1994: 24-hour Broadcast started.

Cool FM Era

• 1 January 2002: Commercial advertisements resume broadcast on 2FM and nationwide cross-broadcast with the Local FM network where abolished.
• 10 October 2003: Relaunched as KBS Cool FM (KBS 쿨FM)
• 3 March 2005: KBS Cool FM Opened its studio to the public along with KBS Radio 2.
• 2006: Started visual radio (BORA) broadcasts on the internet.
• 2 March 2010: KBS Moved Cool FM's radio transmitter from Mount Namsan to Mount Gwanaksan.
• 2016: KBS 2FM Resumed national broadcasting of select programs through Cross-Broadcast with Local Radio 2 Stations with Park Myeong-su's Radio Show being the first show to be heard nationally.

FM Radio

Cool FM is available terrestrially in select cities including Seoul, Incheon, Chuncheon, Wonju, Hongcheon, Hoengseong, Cheorwon, Cheonan, Asan, Yesan, Hongseong, Dangjin, Seosan, Taean, Jincheon, Eumseong and Chungju.

Outside of the main station's coverage area, Cool FM can be heard through local Happy FM stations at these times: 5:00~9:00AM KST, 11:00AM~2:00PM KST, and 6:00~8:00PM KST.

DMB Radio(U-KBS Music)

In other areas not reachable terrestrially, Cool FM's programs can be heard via U-KBS' DMB channels.

• Seoul : CH 12B
• Chuncheon : CH 13B
• Daejeon/Cheongju : CH 11B
• Gwangju/Jeonju: CH 12B/CH 8B/CH 7B
• Daegu : CH 7B/CH 9B
• Busan/Ulsan : CH 12B/CH 9B
• Jeju : CH 13B/CH 8B