The 10 regional stations which make up P4 originate their own local programming and also carry jointly produced nationwide content.

P4's programming is a mixture of popular music, traffic announcements, national and regional news.

The name "P4" originates from 1973 when it was the name of a radio programme directed towards younger audience and broadcast on Sunday evenings on DR P1.

[6] Began in April 1974 as Regionalradioen i Holstebro; was later renamed Radio Midt & Vest.

The Trekanten (triangle) region is the area which includes the three major centres of Fredericia, Kolding, and Vejle as well as the towns of Billund, Haderslev, Middelfart, and Vejen.