DD National channel is the largest terrestrial network in the world covering about 92% population and 81% land area of the country.
Being a Public Service Broadcaster the channel continues to make a significant contribution to accelerate socio-economic changes, promote national integration, inculcate a sense of unity and fraternity, and stimulate scientific temperament among the people.
It contributes to disseminating knowledge/education and information for public awareness about means of population control, family welfare, preservation of the environment, ecological balance, and measures for women and children's welfare. It telecast programs for children, physically handicapped and underprivileged, and helps the preservation of the artistic and cultural heritage of the country and promotes sports.
In the satellite mode, DD National is available round the clock. The telecast time of this composite public service channel is so devised that it caters to the needs of different viewers at different timings.
The information component on DD National consists of news and current affairs programs largely produced in-house. The Question Hour in Parliament is telecast live on the DD National and DD News Channel.