It was founded in 1989 and is managed by the CNFS of the Royal Spanish Football Federation.

When finishing the regular season in every group, the top team of each group and the four runners-up with highest scores play the promotion playoffs to Segunda División.

Conversely, the two or three bottom teams of each group are relegated to Tercera División.

Some teams are forced to give up for not meet financial requirements to play in LNFS, even having won the promotion.

Teams from Basque Country, Navarre, Aragon, La Rioja & Valencian Community Teams from Catalonia, Valencian Community and Balearic Islands.