In a hurry? The GPRN is a 7-digit number on any gas bill, old or new. No bill? On a pay-as-you-go meter it can appear on screen 32 as “Ref”, it is printed on Payzone top-up receipts, and Gas Networks Ireland will look it up on 1800 464 464 if you have the address or Eircode and the meter serial number.
One warning before you type anything into a switching form: the 11-digit number on your electricity bill is the MPRN, and it will not work for gas. Seven digits, gas. Eleven digits, electricity.
What is a GPRN and why does a gas switch need it?
GPRN stands for Gas Point Registration Number — a unique 7-digit reference that identifies one connection to the Irish gas network. Yours points at the pipe into your property and at nothing else: not your account, not your meter, not you. Gas Networks Ireland, which owns and runs the pipes for every home in the state, keeps the register; suppliers merely bill against the number.
That design is why the GPRN behaves the way it does. It never changes when you switch supplier, because the pipe doesn’t. It survives changes of tenant, changes of account name and changes of meter. And it is why a new gas supplier’s sign-up form asks for it before almost anything else — the GPRN is how they tell Gas Networks Ireland which connection to move. Hand it over with a meter reading and the rest of the switch is the new supplier’s job, typically done in two to four weeks with the gas flowing throughout.
Because the number belongs to the property, you also cannot borrow it from anywhere else. The previous occupier’s bill for this address carries the right GPRN; your own old bill from a previous address does not.
Where do I find my GPRN?
Five routes, fastest first. The first two need a bill or a login; the middle two are for pay-as-you-go homes; the last one works when you have nothing at all.
| Route | How long | You need | The detail |
|---|---|---|---|
| Any gas bill | Under a minute | One bill, paper or PDF — even an old one | Printed on every gas bill, though each supplier parks it somewhere different — near your account details on most layouts. It is labelled GPRN, not "account number". An old bill is fine: the number never changes. |
| Supplier app or online account | A couple of minutes | Your login | Most suppliers show the GPRN under account or property details, and every PDF bill in the app carries it. Same number, no paper. |
| Pay-as-you-go meter screen | Two minutes at the meter | Nothing — no card, no login | GNI’s standard PAYG gas meter can show the number on screen 32, labelled "Ref". Steps below. |
| Payzone top-up receipt | Under a minute | A recent gas top-up receipt | PAYG customers: the GPRN is printed on the shop top-up receipt. Check the last one in your wallet before you go near the meter. |
| Gas Networks Ireland — 1800 464 464 | One phone call | Registered name, address or Eircode, meter serial number | The network operator holds the GPRN for every gas connection in the country. This is the route when there is no bill at all — a new build, a just-moved-in house, a landlord who kept the paperwork. |
The bill is the boring, reliable answer — and any bill will do, because the number cannot go stale. Suppliers do scatter it around their layouts, so if you are staring at a page of line items, scan for the letters “GPRN” rather than a familiar position; our gas bill explainer walks the whole page if you want the tour. What you are looking for is a bare run of digits, up to seven of them, with no euro sign attached.
How do I read the GPRN off a pay-as-you-go gas meter?
Pay-as-you-go homes often have no bill to check — top-ups replace billing — but the meter itself knows its own number. Gas Networks Ireland documents a button route on its standard PAYG gas meter that ends at a screen labelled “Ref”, which is the GPRN. As documented on GNI’s GPRN page (checked August 2026):
- Leave the top-up card out. Without inserting it, press the red A button to wake the meter.
- Wait for the balance. Once the screen lights and shows your credit balance, press and hold the red A button until the meter beeps.
- Step through the screens. Each press of the red A button now advances one numbered screen.
- Stop at screen 32. It shows “Ref” followed by the GPRN — for example, Ref 0123456. That 7-digit number, leading zero included, is what the switching form wants.
Two shortcuts before you stand in the cold counting button presses. Your Payzone top-up receipt carries the GPRN too — the last one in your wallet may settle this in ten seconds. And if your meter’s screens do not match the sequence above (models vary), skip the archaeology: the phone route below gets the same number from the people who issued it.
What if my GPRN has fewer than 7 digits?
The leading-zeros catch: a GPRN is always seven digits, but some bills print it with the leading zeros trimmed — so a connection whose real number is 0012345 can appear as 12345. If the number you have found is shorter than seven digits, pad the front with zeros until it is seven long. Forms that validate the length will reject the short version, and a call-centre agent typing it in will hit the same wall.
Never pad the end, and never guess missing digits anywhere else — only leading zeros are ever dropped.
This is the single most common reason a correct-looking GPRN gets refused, and it is worth thirty seconds of counting before you blame the form. Five digits on the bill does not mean your bill is wrong; it means the print layout dropped two zeros that the registration system still expects to see.
GPRN vs MPRN vs meter serial — which number goes where?
A dual-fuel household juggles three identifying numbers, and switching forms are unforgiving about which is which. The trap that wastes the most time: pasting the electricity MPRN into the gas half of a switch. It fails every time — the MPRN is eleven digits and starts with 10, the GPRN is seven, and the two registries never overlap. The digit count is your instant check.
| Number | Stands for | Length | Belongs to | Where it lives | What it’s for |
|---|---|---|---|---|---|
| GPRN | Gas Point Registration Number | 7 digits (pad with leading zeros if shorter) | The gas connection at the property | Gas bill, PAYG meter screen 32, top-up receipt, GNI | Identifies the gas connection on a switch or move-in — the number a new gas supplier asks for |
| MPRN | Meter Point Registration Number | 11 digits, starts with 10 | The electricity connection at the property | Electricity bill; ESB Networks | The electricity twin — needed for the electricity half of a switch, useless for gas |
| Meter serial number | The manufacturer’s ID on the meter box | Varies — letters and digits | The physical meter (changes if the meter is swapped) | Printed on the front of the gas meter | Identifies the hardware — GNI asks for it on the phone to confirm the right property, but it is not the GPRN |
The meter serial deserves a special mention because it is the number physically staring at you when you go looking. It is printed on the front of the gas meter, it identifies the box, and it changes if GNI ever swaps the hardware — which the GPRN never does. Its one starring role is verification: GNI asks for it when you ring to retrieve a GPRN, precisely because it proves you are standing at the meter you claim to be. If you need the electricity twin of this page, it is at find your MPRN.
What does Gas Networks Ireland need when I call?
When there is no bill, no app login, no receipt and no cooperative meter, the register itself answers the phone. Gas Networks Ireland’s number is 1800 464 464, and per their GPRN page they will want three things to release the number:
- The registered name on the connection — yours, or the previous occupier’s if you have just moved in and know it;
- The address or Eircode — the Eircode is the cleaner of the two, since it removes any ambiguity between similar addresses;
- The meter serial number — read it off the front of the gas meter before you dial, because it is the piece people ring back for.
The same call can tell you which supplier is currently registered against the connection — handy in a new home where you have no idea whose customer you technically are. That question has its own guide covering the electricity side too.
I’ve just moved in and there’s no bill — what do I do?
New builds and fresh move-ins are where the GPRN hunt actually matters, because you need the number to open a gas account at all. The order of attack: check the hall for the previous occupier’s gas bill (the GPRN on it is the property’s, so it is your GPRN too — their debt, if any, is not); check whether the meter is pay-as-you-go and try the screen route; then ring GNI on 1800 464 464 with the Eircode and meter serial. Do it early — until a supplier registers against the GPRN in your name, nobody is billing the gas, and the catch-up bill lands on whoever eventually signs up.
While you are at the meter, photograph the dial reading as well as the serial. That reading opens your account at the right point, and our how to read a gas meter guide covers which digits count. The full move-in sequence — closing the old address, opening the new one, timing the accounts — is in moving house.
Where to next?
With the GPRN in hand, the switch itself is the easy part — the new supplier does the registration and your gas never cuts out. One honesty note as you go shopping: matched.ie is not a CRU-accredited price-comparison site. We rank suppliers on our own verified data, and the regulator’s accredited comparators are listed on cru.ie if you want a regulated tool.
- How to switch energy supplier — the full process, timeline and exit-fee table.
- Cheapest gas in Ireland — the gas-only ranking, year-1 and year-2 cost.
- Find your MPRN — the electricity number, for the other half of a dual-fuel switch.
- How to read a gas meter — the reading that opens and closes accounts on your GPRN.
- Gas bill explained — every line on the bill, including where the GPRN sits.
