Compare Energy Tariffs

Get a comparison & start saving now!

What are MPAN and MPRN numbers?

Switching your electricity or gas can seem intimidating. That’s why we’ve put together this complete guide to understanding MPAN and MPRN numbers and how they affect the price of your energy contract..


Mpan _graphic -large


MPAN stands for Meter Point Administration Number. Sometimes known as a ‘Supply Number’ or 'S Number', an MPAN number is unique to a property and is used by energy companies to decide on your electricity rates. Your MPAN number can be found on an electricity bill, is 21 digits long and should be presented in a format similar to the example image shown above.   

MPRN Meaning 

The home gas equivalent to an MPAN number is an MPRN number which stands for Meter Point Reference Number and relates to the gas supply. An MPRN number is a unique 6-10 digit number belonging to a residential property so it can be identified by energy suppliers. It is often referred to as an ‘M Number’. 

How to find your MPAN and MPRN numbers

Your MPAN and MPRN numbers are easy to locate. The MPRN number has 6-10 digits and will appear on your gas bills. It is often referred to as an ‘M Number’ (so there’s no need for confusion if the term ever comes up). If you can’t find your bill, you can call the National Grid’s Meter Number Helpline on 0870 608 1524 and ask for your ‘MPRN Number’ or ‘M Number’. Similarly, your MPAN number is 21 digits long and can be found on your electricity bills. You can also call your energy supplier and ask for your ‘MPAN number’ or ‘S Number’. 

It is vital that you understand your MPRN number, and what it entails. If it starts with 74 or 75 then your home is supplied by an Independent Gas Transporter, which may mean your gas price is more expensive, as some suppliers charge a higher rate to customers served by independent gas transporters.

If this is the case and you want better deals on your gas contract, get in touch with Love Energy Savings – we are energy comparison experts and will find a supplier that’s perfect for your needs.

Business customers click here, or for home energy comparisons click here.

Keen to learn more? We have more in-depth information on the anatomy of an MPAN number below.

Profile Type

Depending on whether you are a household or a commercial property you will have a different meter. Home businesses will run on a domestic meter.

Domestic Meters

There are two profile classes available to domestic properties:

01 ‘Domestic Unrestricted’, where you are charged a standard rate based on your consumption;

02 ‘Domestic Economy 7’ which includes off-peak pricing during certain hours of the night.

A table of all profile classes (including the classes Commercial properties) is shown below:

00 Half-hourly supply
01 Domestic Unrestricted
02 Domestic Economy 7
03 Non-Domestic Unrestricted
04 Non-Domestic Economy 7
05-08 Non-Domestic Maximum Demand


Customers in Profile Classes 05 to 08 are known as Maximum Demand (MD) customers, meaning that they require the highest amount for a certain period of time. MD customers have registers attached to their Meter Systems in order to supply the maximum demand of energy for a given period.

A Peak Load Factor (LF) is the ratio of consumption during a given period compared to the number of kWh that would have been supplied if the maximum demand had been maintained throughout that period. Put simply, the Peak Load Factor informs the customer on how much energy they could have used at maximum capacity.

Meter Timeswitch Code

The Meter Timeswitch Code determines how many meter reads and dials your electricity meter has. It also indicates at what times of the day they will operate. It will also show if your meter has two registers, one which records day consumption, the other night.

Line Loss Factor (LLF)| Business Electricity & Gas

The Line Loss Factor relates to the expected cost the distribution company will charge your supplier for using the network and cables in your area.  It also includes information regarding the charges incurred due to the loss of energy in getting the electricity supplier to your meter.

What Is An MPAN MPRN Number - Line Loss

What Causes Line Loss?

Line Loss is energy lost in the system as it is supplied to your meter. It is estimated 7% of all electricity generated is lost through transmission.

It can occur for reasons such as inaccuracy of revenue meters, energy thefts, or un-metered errors (such as street lights). Line loss is also due to resistance in the wires transferring the electricity, which is why the further your property is from a distribution centre, the more expensive your electricity is likely to be. Longer distance means longer wires, which means more resistance.

Distributor Identifier Code

The Distributor Identifier Code (or Distributor ID) is a unique number assigned to a local distribution company. The distribution company is responsible for the distribution system, wiring and infrastructure which supplies the electricity to your meter. Below is a list of Distributor ID’s and the companies they represent.


ID Name Operator
10 Eastern England UK Power Networks
11 East Midlands Western Power Distribution
12 London UK Power Networks
13 Merseyside and Northern Wales ScottishPower
14 West Midlands Western Power Distribution
15 North Eastern England Northern Power Grid
16 North Western England Electricity North West
17 Northern Scotland SSE Power Distribution
18 Southern Scotland ScottishPower
19 South Eastern England UK Power Networks
20 Southern England SSE Power Distribution
21 Southern Wales Western Power Distribution
22 South Western England Western Power Distribution
23 Yorkshire Northern Power Grid
27 Unmetered Supply Unmetered Supply


MPAN Core (Meter Point ID Number)


The core MPAN (Meter Point ID number) is the unique code assigned to your meter. It is the final 13 digits of your MPAN number and identifies an exit point. The MPAN core is made up of the 2 digit Distributor ID, 8 digit unique identifier number, 2 more digits and finally the check digit.

Check Digit

The Check Digit is the final number in the MPAN and is provided so other systems can validate your MPAN.

Looking To Switch Your Energy Supplier?

Why not call us on 0800 988 8375, or compare gas and electricity prices using our energy comparison engine? You can head straight there by sticking your postcode into the box above this article.