• Proximus reached 2.753 million fibre-ready homes and businesses in Belgium at the end of June, with 820,000 active fibre lines
  • The operator added 44,000 active lines during Q2 and has taken full ownership of Unifiber, giving it greater control over part of the Wallonia rollout

The fact

Proximus had passed 2.753 million homes and businesses with fibre in Belgium by the end of June, while the number of active residential and business fibre lines reached 820,000, the operator said in its second-quarter results.

The company added 44,000 active fibre lines during the quarter. Its total domestic internet base grew by 8,000 customers, while residential converged customers increased by 12,000 to 1.246 million. Proximus said its fibre network had reached about 43% of the Belgian population by midyear.

Proximus also completed the acquisition of the remaining stake in Unifiber, which is deploying fibre in medium-density parts of Wallonia. The company said full ownership gives it greater control over that infrastructure and removes the access fees it previously paid to use the Unifiber network. Group capital expenditure reached €585 million in the first half of 2026.

The assessment

The fibre build is becoming less about adding another headline coverage number and more about what Proximus can do with the network already in place. With 820,000 active lines across a footprint of more than 2.75 million premises, customer migration still has a long way to run alongside continued construction.

Full ownership of Unifiber also gives Proximus more control over the Wallonia network it is using. Instead of paying to access infrastructure held through a separate vehicle, it can manage more of the investment and network planning directly. Whether that improves the economics will depend on how quickly additional customers move onto fibre and how much capital the remaining rollout requires.

For BTW readers, Proximus is entering a stage where take-up matters as much as coverage growth. The next results should show whether active connections are catching up with the footprint while fibre spending begins to ease.

What to watch

Watch the number of active fibre lines against the total footprint, particularly as Proximus integrates Unifiber. Changes in fibre capex, customer additions, and network utilisation will show whether the operator is converting its existing build into more active connections. Progress on the proposed Wallonia partnership with Orange Belgium would also change how future deployment is shared.