What do the numbers in an MPAN mean?
A full MPAN has 21 digits in two lines. The top line (8 digits) shows profile class, meter time switch code and line loss factor class. The bottom line (13 digits) is the core: a 2-digit distributor ID, a 10-digit unique number and a check digit.
The MPAN is laid out in a standard grid. Here is how to read it, using a made-up example (not a real supply).
05 123 456 / 12 3456789012 3
Top line: how you are metered and charged (8 digits)
| Part | Digits | Meaning |
|---|---|---|
| Profile class | 2 | The usage pattern used for settlement. In the example, 05 |
| Meter time switch code | 3 | How the meter records use, such as day/night registers. In the example, 123 |
| Line loss factor class | 3 | Network energy losses; affects distribution charges. In the example, 456 |
Profile classes 01 and 02 are domestic; 03 is non-domestic single-rate and 04 non-domestic two-rate; 05 to 08 are larger sites with maximum demand metering; 00 means half-hourly settled. So 05 in the example would be a larger, maximum-demand site. For more, see which profile class is my business.
Bottom line: the core (13 digits)
| Part | Digits | Meaning |
|---|---|---|
| Distributor ID | 2 | Your regional network operator; IDs run from 10 to 23 across the 14 regions |
| Unique identifier | 10 | Your individual supply point |
| Check digit | 1 | Used to validate the number |
In the example above, 12 is the London area. The others run from 10 (Eastern England) to 23 (Yorkshire); our MPAN and MPRN guide has the full table. These IDs cover Great Britain only.
What can change
The core stays with the premises unless the site gets a new connection. The top line can change, for example if your meter or settlement type is updated, so an old paper copy may be out of date.
Why you should care
- The core number is what quotes and switching are based on.
- The distributor ID tells you which network area you're in, which influences regional charges.
- Wrong top-line details can lead to wrong charges, so check against your bill.
Many bills only print the core. Ask your supplier for the full 21 digits if you need them.
Find it with where to find your MPAN, or read the MPAN glossary entry.
Mistakes to avoid
- Mixing up the two lines. The top line describes metering; the core identifies the supply.
- Typing a digit wrong. The check digit exists so errors can be caught, but a wrong number that happens to be valid points to someone else's supply.
- Using an old top line. Profile class and meter time switch code can change when meters change.
Worked check
Using the made-up example above: the top line is 05 123 456, so the profile class is 05, the meter time switch code is 123 and the line loss factor class is 456. The core is 12 3456789012 3: distributor 12, unique number 3456789012, check digit 3. Count them: 2 + 3 + 3 = 8 for the top line, and 2 + 10 + 1 = 13 for the core, making 21 in total.
When the numbers look wrong
If the distributor ID does not match your region, or the profile class says domestic for a shop, raise it with your supplier in writing and include a photo of the meter. Wrong details can mean the wrong network charges or a rejected switch.
Where to go next
For what profile classes mean in practice, read profile classes explained.
Sources
General information only. Energy prices, rules and supplier terms change; check the latest position with your supplier, Ofgem or the Energy Ombudsman before you act.