Distribution Network Operator (DNO)
Your DNO looks after the local cables and substations that bring electricity to your premises, whoever your supplier is.
What it is
A Distribution Network Operator (DNO) owns and runs the regional electricity network between the national grid and your meter. Great Britain has 14 licensed distribution areas, which were held by six company groups as of 2022. Smaller networks, often on newer developments, are run by independent DNOs (IDNOs).
The DNO is a regional monopoly. Switching supplier does not change it.
Where you will see it
- On your electricity bill, often as "distributor" or "network operator".
- In your MPAN: the first two digits of the bottom line identify the DNO or IDNO serving the site.
- Within your bill as DUoS charges, which pay for the local network.
Why it matters
The DNO handles power cuts, damaged cables, new connections and capacity upgrades. Supplier problems and network problems need different phone numbers: if the power is off, you call the DNO, not your supplier. If you want a larger supply or a new connection, you apply to the DNO as explained in our new connection guide. It also sets the capacity limit for sites that pay supply capacity charges.
Example
A workshop wants to add a three-phase machine. The supplier cannot approve this by itself, so the owner contacts the DNO to check whether the existing supply can handle the extra load.
Find your DNO from the first two digits of your MPAN core (the bottom line of the full MPAN), which identify the distributor, or ask your supplier.
Related terms
The gas equivalent is the gas distribution network.
Common questions on this topic
Sources
General information only. Energy prices, rules and supplier terms change; check the latest position with your supplier, Ofgem or the Energy Ombudsman before you act.