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

If you’re moving house, it isn’t always immediately obvious who your energy supplier is. Here’s how you can find out.

With another winter of high energy bills now upon us, the energy crisis is still being felt by most households across the UK. The Ofgem energy price cap, which currently regulates most people’s gas and electricity bills, is set to go up by 5% from 1 January 2024.

It means you don’t want to be caught out by any extra costs – something that could arise if, for some reason, you don’t know who your energy supplier is. For those who are struggling to keep up with their payments, see our guide to all the help with energy bills that’s available. Our energy comparison can also show you how to save on your gas and electricity.

So, if you’re not sure who your supplier is, how do you find out? We’ve explained everything in this brief guide.

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.