Who is my supplier of electricity and gas? How to find out

Switching energy supplier is making a gradual comeback, with several gas and electricity tariff options now available to consumers. Some of these deals may work out as being cheaper than the Ofgem energy price cap.

It means that choice is returning to the market for the first time since the energy crisis began in 2021. But the best way to save money on your energy bills is to cut your usage. Our energy saving top tips will help you to slim down your costs.

One of the first ports of call if you’re considering changing tariffs or switching is your own supplier. They are sometimes able to offer you a better deal as an existing customer. For example, several EV tariffs are only available to current customers.

If you’ve only recently moved home, you might not know who powers your household. So, who is my supplier of electricity and gas? Here’s how to find out.

Who is my supplier of electricity?

As of March 2023, there were 21 energy suppliers providing gas and/or electricity to UK homes, according to the Government. While this is around a third of the number that were operating five years ago, it still means you won’t be able to make an educated guess about who’s powering your home.

If you’re moving into a new property, it’s highly likely that a letter from the supplier who provided power to the previous tenants/owner-occupier will be on your doormat when you first walk in.

This letter, which will be addressed to the occupier, will inform you that that supplier is continuing to provide your home with energy, and how to set up an account with them. They will place you on their default tariff, which means you can opt to switch to a different provider without facing any exit fees.

Sometimes, it may take several days before this letter arrives. But, if weeks go by and you haven’t heard anything, it’s worth finding out who your supplier is so that you’re not confronted with a hefty bill at a later date.

The best way to do this is to contact your distribution network operator. This is the company that runs the power grid or gas mains infrastructure in your local area. You can find out who they are by entering your postcode into industry body the Energy Networks Association’s website.

For ease, we’ve also listed them below by nation and region, along with their websites and contact telephone numbers. It may be that you have to contact more than one of these operators where they bisect an area:




Northern Ireland

Isle of Man

What is an MPAN or MPRN?

The distribution network operator may ask you for your meter number, although they will still be able to tell you who your supplier is without this bit of information. You will have two numbers if you live in a dual fuel home. These are your Meter Point Administration Number (MPAN) or Meter Point Reference Number (MPRN).

Your MPAN is a unique, 21-digit number linked to the electricity meter in your home. It can be found on your bill and is different to your customer reference number. Your MPRN is similar, but is only six to 10 digits long.

Neither number appears on your meter itself (see our meter reading guide to find out what the numbers you’ll find, mean). But you can find your MPAN by putting your postcode into the Energy Networks Association’s website and your MPRN by typing your postcode into the Find My Supplier website. Alternatively, you can ask your distribution network operator to tell you what they are. While you won’t need them that often, they may come in handy if you have a gas leak or need to move your meter.