Grid and DSOs: operator, meter and EAN code

Your electricity bill carries only one name: your supplier’s. Yet the supplier is not the one bringing power to your home. It sells you the energy and collects the whole bill; your distribution system operator (DSO) carries it to your meter, reads your meter and fixes outages. You choose the first. Never the second: it is appointed for a territory and comes with your address. In Wallonia, five DSOs share the electricity grid, ORES, RESA, AIEG, AIESH and REW, and only ORES and RESA also distribute gas. Our “Find your DSO” tool gives you yours, for electricity and for gas, from your postcode.

This split tells you who to call:

• an outage, a wrong meter reading, a connection: your DSO, because only the grid operator collects metering data on its grid;
• a price, a contract, a move: your supplier, who bills what the DSO has measured.

Upstream, Elia carries power at high voltage, and four regulators share oversight: the CREG at federal level, and the CWaPE, Brugel and the VREG in the regions. “DSO vs supplier: who does what in Belgium?” goes through each player, what each one weighs on your bill, and the cases where the DSO becomes your supplier itself.

For almost every one of these steps, you will be asked for your EAN code: eighteen digits starting with 54, printed on every bill. It identifies neither your meter nor your contract, but the point where electricity enters your home. So it does not change when you switch supplier, and you have one per energy. “Belgian EAN code: where to find it, what it’s for” explains where to find it when the bill is missing, when to give it and who should not get it.

The meter itself is changing. Since January 2026, every supply point in Wallonia must get a smart meter by the end of 2029, and you can no longer refuse the installation: only its communication function can be switched off, with heavy consequences. Replacing a conventional meter is free, and you can ask your DSO for one without waiting. A smart meter opens up the Impact tariff, the P1 port and access to your quarter-hour data.

That quarter-hour data is also what energy sharing depends on. In a sharing operation, the DSO reads every participant’s data and applies the allocation key, which sets the share of shared electricity allocated to each one. For a household, taking part in practice means a smart meter with its communication function switched on. “Smart meters in Wallonia: the complete guide” explains how to get one from each of the five DSOs, what it costs and what switching off its communication costs.

The guides below start with the players, then turn to the meter.