NPO Radio 4
FM: 87.6–101.6 MHz|
CanalDigitaal: 704 (Astra 23.5°E)
Various frequencies on analogue cable
|First air date||1975|
|Former callsigns||Hilversum 4|
The channel began broadcasting on 28 December 1975 under the name Hilversum 4, changed to Radio 4 on 1 December 1985. Its first programme was produced by the Veronica broadcasting association (VOO).
On 19 August 2014 the station's name and logo were amended to include mention of its parent broadcasting organization, NPO.