MPAN

Every electricity supply point in Great Britain has its own MPAN - think of it as your meter's unique fingerprint. You'll find this number on your electricity bill, usually in a distinctive grid format.

The MPAN isn't just a random string of numbers. Each section contains specific information: which regional network operator supplies you, what type of customer you are (domestic or business), and crucially, which tariff category applies to your supply. The last digit is a "check digit" that helps catch any typing errors.

MPAN Structure:

• Profile Class (2 digits): Your customer type (01-02 domestic, 03-08 non-domestic, 00 for MHHS migrated)
• MTC/SSC (3-4 digits): Meter Timeswitch Code or Standard Settlement Configuration
• LLFC (3 characters): Line Loss Factor Class - the key link to your tariff
• Distributor ID (2 digits): Which of the 14 regional DNOs supplies you
• Unique ID (8 digits): Your meter's unique reference number
• Check Digit (1 digit): Validates the MPAN is entered correctly

For businesses checking their bills, the most important part is the LLFC code embedded within the MPAN - this three-character code determines exactly which tariff rates you should be charged. If this code is wrong, you could be paying the wrong rates entirely.