Find your DSO in Belgium: electricity and gas

Enter your postcode: the tool shows the electricity and gas distribution network operators of your municipality, in Brussels, Flanders and Wallonia. The search stays in your browser.

See the DSO of every municipality in the table

Find your DSO with your postcode

To find out who your DSO is, enter the four digits of your postcode in the tool above. If the postcode covers several municipalities, the tool asks for yours; if the operator depends on the section of the municipality (the former municipality), as in Baarle-Hertog (Baerle-Duc), it asks for your section.

The result shows electricity and gas separately, then what is good to know, the regulator, the tariffs and a link to copy. The search runs in your browser and needs no account: your postcode does not leave it.

The tool answers for a municipality or a section of a municipality, never for a precise address. It does not tell you whether the gas network runs down your street, and does not cover businesses connected directly to Elia’s network. Without JavaScript, a table gives the DSO of every municipality.

What is a DSO?

The distribution system operator (DSO), also called the distribution network operator or grid operator, is the company responsible for the local electricity or gas network, up to your meter. On Belgian bills and documents, it is called GRD in French and netbeheerder in Dutch. In Wallonia, the CWaPE sums up its tasks: operating, maintaining and developing the network, metering, and dealing with faults (CWaPE).

Each DSO is designated for a territory: one or more municipalities, sometimes only part of a municipality. You are free to choose your supplier, which sells you the energy, sends you the bill and then splits the payment between all the parties involved (ORES). Your network operator, on the other hand, depends on where you live.

DSOs in Belgium, region by region

Belgium has fourteen electricity distribution system operators: Sibelga in Brussels, eight Fluvius operators in Flanders and five DSOs in Wallonia (sources). For natural gas, Fluxys counts eleven: Sibelga, the eight Fluvius operators, ORES and RESA (Fluxys).

Brussels: Sibelga

Sibelga is the only electricity and natural gas distribution system operator in the Brussels-Capital Region, and so in its 19 municipalities. It has sold neither electricity nor gas since liberalisation in 2007; it reads meters, repairs faults and deals with gas smells (Brugel).

Flanders: eight Fluvius operators

The VREG, the Flemish energy regulator, designates the distribution system operators (VREG). Eight Fluvius operators share Flanders’ 285 municipalities, usually the same one for electricity and for gas:

Fluvius Antwerpen: 28 municipalities
Fluvius Halle-Vilvoorde: 29 municipalities
Fluvius Imewo: 38 municipalities
Fluvius Kempen: 27 municipalities
Fluvius Limburg: 39 municipalities
Fluvius Midden-Vlaanderen: 21 municipalities
Fluvius West: 59 municipalities
Fluvius Zenne-Dijle: 44 municipalities

These 2026 figures come from the VREG’s tariff decisions (sources). There are two exceptions for gas. Voeren (Fourons) is excluded from Fluvius Limburg’s designation for gas: the municipality has no natural gas distribution system operator (VREG, decision BESL-2015-47). In Baarle-Hertog, gas is distributed by Enexis, a Dutch operator, except in the section of Zondereigen, which is served by Fluvius Kempen (VREG).

Wallonia: ORES, RESA, AIEG, AIESH and REW

The Walloon Government designates the DSOs, on a proposal from the local authorities and after receiving the CWaPE’s opinion. Five DSOs share the electricity networks; two of them, ORES and RESA, also distribute gas (CWaPE). In October 2026, our table gives these counts for electricity:

ORES: 194 municipalities
RESA: 54 municipalities
AIEG: 6 municipalities (Andenne, Brunehaut, Gesves, Ohey, Rumes and Viroinval)
AIESH: 6 municipalities (Beaumont, Chimay, Couvin, Froidchapelle, Momignies and Sivry-Rance)
REW (Réseau d’Énergies de Wavre): 1 municipality, Wavre

For gas, our table gives ORES in 118 municipalities, including only part of Bastogne, and RESA in 59. These figures come from the Walloon Government’s designation orders, except in Walcourt (ORES) and Marchin (RESA): the CWaPE names a gas operator there, but we have found no designation order, and the information is still to be confirmed (sources).

Tariffs specific to each DSO

Each DSO sets its distribution tariffs according to the method laid down by its region’s regulator: the CWaPE in Wallonia (CWaPE), Brugel in Brussels (Brugel). In Flanders, the VREG approves them every year; they vary with the network area where you live (VREG).

Electricity and gas: one or two operators

The same address can be served by two operators, one for electricity and another for gas. This is the case in about twenty Walloon municipalities. In 17 municipalities in the east of the province of Liège, including Verviers, Eupen, Malmedy and Spa, ORES runs the electricity network and RESA the gas network (RESA, annual report 2024); this has also been the case in Saint-Vith (Sankt Vith) since 2026. Elsewhere, AIEG, AIESH and REW only run electricity networks (CWaPE): in Wavre, REW runs the electricity network and ORES the gas network (Walloon Government order of 9 June 2022); in Couvin, it is AIESH and ORES, and in Andenne, AIEG and RESA (sources).

More than 80 Walloon municipalities have no designated gas DSO, like Voeren in Flanders. According to the CWaPE, the home is then in an area without gas (CWaPE). In Saint-Vith, which long had no gas network, RESA is building a new one, supplied by a tank of compressed natural gas refilled by lorry (CWaPE).

Conversely, a gas DSO designated for your municipality does not mean that the network runs down your street: in some municipalities, only some streets are served (CWaPE). For a connection, ask that operator.

Recent changes of operator

A municipality’s operator can change. In the result, the label “Recent change of operator” flags the changes of 2026, and the label “Information to be confirmed” the points that our sources do not yet establish.

Brunehaut, electricity. AIEG replaced ORES on 1 January 2026 (ORES Assets, annual report 2025). For gas, we have found no designation since that of the intermunicipal company IGH ended on 1 January 2023 (CWaPE): this point is still to be confirmed.
Namur and Gesves, electricity. An exchange of networks between ORES and AIEG was decided with effect from 1 July 2026: ORES takes over the network of Flawinne, Marche-les-Dames, Saint-Marc and Vedrin, in Namur, and AIEG that of Gesves (ORES Assets, general meeting of 21 May 2026). No public source confirms yet that the exchange has been completed.
Saint-Vith, gas. RESA has been the designated operator since 1 June 2026 (Walloon Government order of 25 June 2026). Until then, no gas DSO was designated in the municipality (CWaPE).
Beveren-Kruibeke-Zwijndrecht, electricity and gas. Since 1 January 2026, the whole municipality has come under Fluvius Midden-Vlaanderen; until then, Zwijndrecht (2070) came under Fluvius Antwerpen (VREG, decision BESL-2026-30).

The change in Couvin is older: on 1 January 2024, AIESH took over from ORES the electricity network of Boussu-en-Fagnes, Couvin, Frasnes-lez-Couvin, Mariembourg and Petigny (Walloon Government order of 8 September 2022; CWaPE, AIESH’s authorised revenue 2025-2029). Since then, AIESH has run the electricity network of the whole municipality.

Supplier, DSO, Elia, Fluxys: who does what?

The supplier sells the energy; the DSO carries it over the last stretch, up to your meter. Upstream:

Elia runs the high-voltage electricity transmission network (it is the TSO). In Wallonia, Elia is also the local transmission system operator, up to 70 kV, on sections set by the Walloon Government (CWaPE). In Flanders, it runs the “plaatselijk vervoernet” (local transmission network) and no distribution network (VREG). A business connected directly to these networks has Elia as its operator, not a DSO.
Fluxys Belgium runs the high-pressure natural gas transmission infrastructure; the distribution system operators run the local low-pressure networks that serve households and SMEs (Fluxys).

Unless you are connected directly to these transmission networks, the DSO is the one you call when there is a fault. If you are a household, your annual statement or closing invoice gives its name and the phone number to call in the event of a power cut (Royal Decree of 9 December 2021, article 4, 7°).

Your energy bill also shows your EAN code: 18 digits, starting with 54 (Fluvius, in Dutch), a separate code for each energy type, linked to the supply point and not to the customer (ORES). The guide “Read your Belgian electricity bill line by line” explains the rest of the bill.

In an energy-sharing operation, the DSO collects the participants’ quarter-hourly data and applies the allocation key, which sets each participant’s share of the shared electricity.

OptimCE is an open source platform for managing energy communities. It currently covers the Walloon framework; Brussels and Flanders are planned, but not yet implemented (features). In Wallonia, our guides explain how to join an energy community or create one.

Where do the data come from?

OptimCE compiles the data from the decisions and opinions of the regulators and the Walloon Government, from the network operators’ publications and from open data (Statbel, Fluvius, ORES). They cover 565 municipalities and 1,149 postcodes. The table of DSOs by municipality lists them all, with the sources, most of which are in French or Dutch. Found an error? Write to us at contact@optimce.be.

Frequently asked questions

How do I find out who my distribution network operator is?

Enter your postcode in the tool at the top of this page: it shows your municipality’s distribution system operator (DSO) for electricity and the one for gas. If the postcode covers several municipalities, or if the operator changes from one section of the municipality to another, the tool asks you to specify. To check, look at your annual electricity statement: for a household, it gives the name and phone number of the network operator to call in the event of a power cut.

What is the difference between my DSO and my supplier?

The supplier sells you electricity or gas and sends you the bill: you choose it yourself. The DSO runs and maintains the network up to your meter, takes your meter readings and steps in when there is a fault: it depends on your address. The DSO’s network charges appear on the supplier’s bill, and the supplier passes them on to the DSO.

Can I change my network operator?

No. Each DSO is designated for a territory: in Wallonia by the Walloon Government, on a proposal from the local authorities and after receiving the CWaPE’s opinion; in Flanders by the VREG. In Brussels, Sibelga is the only operator. Your DSO only changes if you move to an area served by another operator, or if your municipality changes operator, as Brunehaut did for electricity on 1 January 2026.

Who do I call in the event of a power cut or a gas fault?

Your DSO, not your supplier: it runs the network and deals with faults. For a household, the name and phone number to call in the event of a power cut appear on the annual statement or closing invoice. In Brussels, for example, Sibelga also deals with gas smells. The tool gives the name and website of your electricity and gas operators.

Where can I find my EAN code?

On your energy bill. The EAN code identifies your supply point: in Belgium, it has 18 digits and starts with 54. There is a separate code for each energy type: one for electricity, another for gas. It stays with the supply point, not with the person: it does not change when you switch supplier.

Why is there no gas DSO in my municipality?

Because no natural gas distribution system operator is designated there: this is the case in more than 80 Walloon municipalities and in Voeren (Fourons), in Flanders. In Wallonia, the CWaPE explains that the home is then in an area without gas. Conversely, a designated gas DSO does not guarantee that the network runs down your street: for a connection, ask that operator.