What Is an MPRN Number and Why You Need It to Switch Gas Supplier

A Meter Point Reference Number (MPRN) is a unique 6 to 11 digit code that identifies the gas supply point at your address. Your gas supplier and gas transporter use it to confirm which meter belongs to which property. Every property with a gas connection has one MPRN, and it stays linked to that address, not to you or your supplier account. If you're switching gas supplier in 2026, comparing prices, or moving house, this number is one of the first details you'll need. This guide covers what an MPRN is, where to find it, and how it fits into the switching process.

What Is an MPRN Number, Exactly?

An MPRN, or Meter Point Reference Number, works like an address for your gas meter within the national gas network. The Meter Point Administration Service assigns one MPRN to every gas supply point in Great Britain. Your gas transporter (the company that owns the physical pipes in your area) creates and maintains this number, separate from whichever supplier bills you. Because the MPRN belongs to the property, it doesn't change when you switch suppliers, upgrade your meter, or sign a new contract. It only changes if you move to a different address.

You'll usually see the MPRN printed on your gas bill under a heading such as 'Meter Point Reference' or 'MPRN'. Some suppliers also label it as your gas 'M number'. If you're comparing deals on SwitchSquid's gas comparison page, having this number ready speeds up the quote and switching process.

MPRN vs MPAN vs Meter Serial Number

These three terms get confused often, so here's the distinction. An MPRN identifies your gas supply point. An MPAN (Meter Point Administration Number) identifies your electricity supply point and is a 21-digit number starting with 'S'. A meter serial number (MSN) identifies the physical device fitted at your property, not the supply point itself.

The meter serial number sits on the meter itself, usually above or below the barcode, and changes to a new value if a smart meter replaces an old one. The MPRN and MPAN stay fixed to the property regardless of what hardware sits inside it.

Where to Find Your MPRN Number

Check these three sources in order of ease:

1. Your gas bill: look on page 1 or 2, next to 'Meter Point Reference', 'MPRN', or 'M number'.

2. Your smart meter's in-home display: open the meter information menu and tap the gas button once to cycle to the MPRN screen.

3. The meter itself: some newer installations stamp the MPRN on a sticker near the meter box, though this isn't universal.

If you've just moved in and don't have a bill yet, ask the previous occupant or landlord. They'll have used the MPRN to submit a final meter reading, so it should be on hand.

How to Find Your MPRN Number Online

Yes, you can find your MPRN online without a bill through the industry's free Find My Supplier tool. Enter your postcode, confirm your address, and the tool returns your MPRN alongside your current gas supplier and transporter. This service is run independently of any single supplier, so the result is neutral and accurate.

If the online lookup doesn't return a result, for instance for a brand-new connection, call the Meter Number Helpline. Give your postcode and house number, and staff will confirm your MPRN over the phone.

Why You Need Your MPRN Number to Switch Gas Supplier

You need your MPRN to switch gas supplier because it's how the new supplier confirms they're taking over the correct meter. Without an accurate MPRN, a switch can register against the wrong property, a problem known as an erroneous transfer. That mix-up delays your new contract, and it can leave your old supplier still billing you while a stranger's gas usage lands on your account.

When you request a quote through SwitchSquid's energy switching guide, the platform matches your MPRN against Meter Point Administration Service records automatically, so the transfer targets the exact meter at your address. This matters most in these three situations:

1. Switching supplier: your new supplier submits your MPRN to begin the transfer, which typically completes within 5 working days under the Energy Switch Guarantee.

2. Moving house: you give the outgoing MPRN to your old supplier for a final bill and the same MPRN, now under a new occupant, to the property's new supplier.

3. Reporting a gas issue: engineers use the MPRN to locate the exact supply point during a leak or safety callout.

Your MPRN doesn't change through any of these events. Only a change of address changes the number that applies to you. Keep a copy of your MPRN somewhere accessible, alongside your account number and meter serial number, so you're not searching for a bill when a supplier or engineer asks for it.

What Your MPRN Number Format Means

An MPRN is a string of digits only, with no letters. Length ranges from 6 to 11 digits depending on when the supply point was registered. If your MPRN starts with 74 or 75, an independent gas transporter (not the National Gas network) owns the local pipework, and some suppliers apply a small premium for supplies on these networks. The remaining digits don't encode a tariff, region, or usage pattern; they exist purely to identify one supply point among millions across the UK and Northern Ireland.

Older properties connected before national gas records were digitised sometimes carry shorter, 6 or 7-digit MPRNs, while supply points registered more recently tend to run to 10 or 11 digits. Neither length affects your gas price or supply quality; it simply reflects when the record was created on the national database.

Common MPRN Problems and How to Fix Them

The most common MPRN problem is a mismatch between the number on your bill and the number on file with your gas transporter. This usually surfaces as an incorrect bill, a failed switch, or gas charges for usage you didn't create. Three fixes cover most cases:

1. Wrong MPRN on a bill: contact your supplier directly and ask them to verify the number against transporter records.

2. No MPRN for a new build: request a live or dead check from your local gas transporter, who will assign a new MPRN once the connection is confirmed live.

3. Switch rejected for MPRN mismatch: recheck the number using the online lookup tool and resubmit the switch with the corrected value.

Sort out an incorrect MPRN before you switch, not after. It's far quicker to fix the record now than to unpick a completed transfer that landed on the wrong address. If a transfer has already gone through on the wrong MPRN, contact both suppliers involved so they can reverse the switch and reassign billing to the correct property.

MPRN Numbers in Northern Ireland

Northern Ireland uses the MPRN differently: there, it identifies electricity supply points, not gas. Great Britain and Northern Ireland run separate registration systems, so an MPRN issued by Northern Ireland's network operator is an 11-digit number starting with 81, and it points to an electricity meter rather than a gas one. If you manage properties on both sides of the Irish Sea, keep this distinction in mind, since quoting a Northern Ireland MPRN to a Great Britain gas supplier, or the reverse, will return no match.

For most UK gas customers outside Northern Ireland, none of this changes daily practice. It's a useful fact to know if you're relocating a business across regions or managing energy accounts for properties in more than one part of the UK.

MPRN Number and Business Gas Accounts

Business gas accounts use the exact same MPRN system as residential ones, with one added risk: a wrong MPRN on a business contract causes more disruption. Commercial premises often share a building with multiple gas connections, so it's easy to submit the wrong meter reference during a switch. Before signing a new business gas contract, confirm the MPRN against a recent bill or the online lookup tool, and check it again against the physical meter if the property has more than one supply point. A mismatched MPRN on a business account can delay billing for several weeks and, in shared buildings, may result in one tenant paying for another tenant's usage.

What Is an MPRN Number: Key Takeaways

An MPRN identifies your gas supply point, stays fixed to your property, and sits between 6 and 11 digits long. You'll find it on your bill, your smart meter display, or through the online lookup tool, and you'll need it every time you switch supplier, move house, or report a gas emergency. Getting the number right keeps your switch fast and your billing accurate.

FAQs About MPRN Numbers

What is an MPRN number?

An MPRN, or Meter Point Reference Number, is a unique 6 to 11 digit code that identifies the gas supply point at a specific address. Your gas transporter assigns it, and it appears on your gas bill under 'Meter Point Reference' or 'MPRN'.

Does my MPRN change when I switch gas supplier?

No, your MPRN stays the same when you switch gas supplier. The number is tied to your property's supply point, not to your supplier contract, so it carries over unchanged to your new provider.

Is my MPRN the same as my meter serial number?

No, your MPRN and your meter serial number are different identifiers. The MPRN identifies the supply point at your address, while the meter serial number (MSN) identifies the physical meter and changes if the meter is replaced.

Can I find my MPRN without a bill?

Yes, you can find your MPRN without a bill using the free online Find My Supplier tool or by calling the Meter Number Helpline. Both methods only need your postcode and address to return the correct MPRN.

How many digits does an MPRN have?

An MPRN has between 6 and 11 digits, with no letters included. The exact length depends on when the supply point was first registered on the national gas network.

Why does my MPRN start with 74 or 75?

An MPRN starting with 74 or 75 means an independent gas transporter, rather than the main national network, owns the pipework at your property. Some suppliers charge a small premium for supplies on independent networks, so it's worth checking this when comparing quotes.

Do I need my MPRN if I only have electricity?

No, you don't need an MPRN if your property has no gas connection. In that case, you'll only need your MPAN, the 21-digit number that identifies your electricity supply point instead.