DNOs, are companies licensed to distribute electricity in Great Britain by the Office of Gas and Electricity Markets.
There are fourteen licensed geographically defined areas, based on the former area electricity board boundaries, where
the distribution network operator distributes electricity from the transmission grid to homes and businesses. Under the
Utilities Act 2000 they are prevented from supplying electricity; this is done by a separate electricity supply
company, chosen by the consumer, who makes use of the distribution network.
Distribution network operators are also responsible for allocating the core Meter Point Administration Number used to
identify individual supply points in their respective areas, as well as operating and administering a Meter Point
Administration System that manages the details relating to each supply point. These systems then populate ECOES,
the central online database of electricity supply points.