How to Find Your Gas and Electricity Network by Postcode

To find yours, enter your postcode into the Energy Networks Association's find my network operator tool, which identifies your electricity distribution network operator². For gas, the Find My Supplier service reveals who supplies your gas along with your MPRN number and your gas transporter³. Both lookups take a postcode and nothing else.

The distinction matters because the two companies do different jobs. A network operator is responsible for the pipes and wires that move energy, and should be contacted about power cuts or connection issues in your area⁴. Your supplier is responsible for your meter and any faults with it⁵. In a power cut, call 105 free of charge and you will be put through to your electricity network operator⁶. If you smell gas, call 0800 111 999 immediately⁷.

Who your network operator is, and why it is not your supplier

The network operator and the supplier are separate businesses with separate duties, and the split runs through every household's energy arrangements. Energy network operators own and run the pipes and wires that carry gas and electricity to your home, and they are different to your energy supplier: you do not pay your bill to them¹. A gas distribution network operator is likewise different and separate to your energy supplier⁹.

The practical test is who you pay and who you call. Your gas supplier, the company you pay your gas bill to, is responsible for your meter and any faults with it⁵. The network side is responsible for the pipes and wires that move energy, and should be contacted about power cuts or connection issues in your area⁴. Northern Gas Networks states plainly that it is not a gas supplier¹⁰.

Ownership of the networks is concentrated. Cadent Gas Ltd, Northern Gas Networks Limited, SGN and Wales & West Utilities Limited are the gas distribution network operators⁸. The exception on the gas side is gas transmission, which is owned and operated by National Grid Gas⁸. On electricity, there are 14 operators, and the actual operator is determined by where you live³.

That structure has a consequence for households. Switching supplier changes who bills you, not who owns the cable or pipe outside. Ofgem's guidance on switching lists the information a household needs to change supplier: your postcode, the name of your current supplier, the name of your current tariff, the amount you pay per unit in kilowatt hours, and the amount of energy you use each year¹¹. None of that alters the network.

Finding your electricity network operator by postcode

The electricity lookup is the simpler of the two. Enter your postcode on the Energy Networks Association page to find out who your electricity distribution network operator is². The same tool is the route the Energy Ombudsman points to: you can find out who your network provider is via the Energy Networks Association website¹³. The Met Office directs households to the same place, noting that details for all the electricity Distribution Network Operator companies are available through the Energy Networks Association¹⁴.

There is a second route that does not need a lookup at all. The code on your electricity bill contains a Distributor ID number, which can help you find which network operator looks after your connection¹. That is useful when a postcode sits near a boundary between two operators, or when a new build has not yet settled into the usual records.

Your Meter Point Administration Number is the other identifier worth knowing. It is the unique identifier for your electricity supply point¹⁵. Suppliers use it to identify the property, and it sits alongside the Distributor ID on the bill.

Finding your gas network by postcode

Gas works differently, because the question "who supplies my gas" and "who transports my gas" have different answers. The Find My Supplier service can be used to discover who supplies your gas, as well as your MPRN number and gas transporter³. The MPRN can be found on your gas bill or by using the Find My Supplier search tool¹⁶.

A gas transporter is the company that physically distributes the gas to your home, and it is also responsible for maintaining the pipes to your property¹⁶. That is the gas equivalent of the electricity distribution network operator, and it is the body to contact about the pipework rather than the meter.

For new connections, the gas distribution networks run their own application routes. Northern Gas Networks accepts applications through an online postcode lookup, by telephone, or by downloadable PDF forms¹⁷. That is a connection process rather than an identity check, but it uses the same postcode logic: the network that serves an address is fixed by geography.

In Northern Ireland the electricity picture differs again. NIE Networks allocates a block letter, which can be found by entering your postcode on its Block Map¹⁸. The block letter is based on where you live and how your electricity is supplied¹⁸. It matters because it determines the rota a household falls into if power sharing is needed.

What your network operator is responsible for, and what it is not

The responsibilities divide cleanly once the two roles are separated. A network operator is responsible for the pipes and wires that move energy⁴. It is your electricity Distribution Network Operator that is responsible for maintaining physical electricity supplies to your home or business¹⁴. On the gas side, the transporter maintains the pipes to the property¹⁶, while your gas supplier is responsible for your meter and any faults with it⁵.

Compensation sits with the network, not the supplier. Your gas or electricity network operator is responsible for fixing power cuts and paying you compensation¹⁹. That is a meaningful distinction for a household: a long outage is a network failure, and the payment route runs through the operator.

Complaints follow the same split. Contact your network operator if you have a power cut or connection issues in your area²⁰. Where a household needs to escalate, the Energy Ombudsman handles network operators as well as suppliers¹³.

Power cut or gas emergency: who to contact and when

The power cut number is the same across Great Britain. Calling 105 is free and puts a household through to its electricity network operator⁶. National Grid lists 0800 6783 105 or 105 for power cuts and emergencies²², and states that in an emergency the number is 105²³. Electricity North West asks households affected by flooding to make contact on 105 or report a power cut so it can carry out a safety check²⁴.

The gas emergency number is equally uniform. If you smell gas, call 0800 111 999 immediately⁷. The National Gas Emergency Service operates day or night²⁵. The number is the same whichever gas transporter serves the property, which is why identifying the transporter can wait until after the call.

There is a separate service for planned disruption in Northern Ireland. If power sharing is needed, the rota and what it means can be found at www.powercut105.com by entering your postcode, which shows your block letter and when you will lose electricity²⁶. Power Cut 105 exists to find out which local electricity network you are connected to by entering your postcode²⁷.

Why knowing your network matters for household energy independence

Knowing which network serves an address is the first step in understanding what a household controls and what it does not. The network is the part of the energy system a home cannot choose, cannot switch and does not pay directly. Energy network operators manage and maintain the wires, pipes and other infrastructure which delivers electricity and gas to your home, business and community¹, and they are different to your energy supplier: you do not pay your bill to them¹.

That has a direct bearing on self-generation and electrification. NIE Networks asks households to inform it before installing electric vehicles or heat pumps, because these appliances use a lot more electricity than most, and several unreported installations in the same area can put pressure on the local network²⁸. A household adding a heat pump or an EV charger is therefore interacting with the network, not just the supplier, and the notification requirement exists because local capacity is shared.

The same logic applies to resilience. Utility networks are responsible for ensuring that communities have access to safe and efficient utility supplies, and a cross-utility study covers gas, electricity, water and communications²⁹. Households in vulnerable circumstances can be recorded on the Priority Services Register, which spans suppliers, the network companies who transport energy to your home, and meter operators¹². In Northern Ireland, where a consumer needs alternative forms of communication, the electricity or gas supplier or NIE Networks will provide this free of charge³⁰.

The dependence that remains is structural. A grid-connected home relies on the network for import and export, on a supplier for billing and metering, and on the gas transporter for the pipe to the property. What a household can do is know which body to call, register for priority support where eligible, and notify the network before adding large electrical loads. For the wider picture of where supply comes from and how the network is governed, see UK energy supply and electricity distribution networks.