How do I find my electricity (MPAN) number?

Your MPAN is the unique identifying number for the electricity meter at your property, often referred to as a 'Supply Number' or 'S' number. When you apply to switch electricity supplier with Which? Switch we can usually find your MPAN automatically from the national meter database. However, sometimes we may need to ask you for it, usually when the database information is incomplete.

Your MPAN should appear on your electricity bill- you can check where to find this on bills for all of the larger suppliers with our understanding your energy bill guide. If you can't locate your 'S' number, you should contact your current electricity supplier, who'll be able to tell you the number.

Your supply number will normally be shown on your bill using a large 'S' and a grid of numbers. All we need is the bottom row of numbers (13 digits) to ensure your switch happens as smoothly as possible.

If more than one MPAN is displayed, please select the relevant MPAN you want to switch.

If you've found your MPAN and are ready to switch, start comparing energy prices now with our free and impartial service.

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