Namdalsavisa is a daily, local newspaper serving the district of Namdal, specifically Namsos, Norway.. Profile. Namdalsavisa is published in six times per week in Trøndelag. It was known as Namdal Arbeiderblad until the mid-1990s.. As of 1981 the owner of the paper was the Labour Party and trade unions. The newspaper is currently owned by A-pressen. It is published in tabloid format.