Cell towers in Castelnau-le-Lez (Hérault)

Most of the town's 19 masts are buildings (9); 2 water towers and 2 camouflaged "tree" pylons make up the rest of the mix.

Antennas are listed at Sablassou, Mas de Paoletti, Immeuble le Riva Castella, 57 Avenue des Centurions, Chem du Château D'Eau and 60 Avenue Marcel Dassault.

Over the past 12 months ANFR recorded 25 new systems here. ANFR has approved 3 new sites that are not live yet, plus additions on 4 existing masts. New: Bouygues Telecom (3G, 4G and 5G) at 12 rue Jules Ferry, Bouygues Telecom (4G and 5G) at Courtarelle and SFR (3G, 4G and 5G, including 5G at 3.5 GHz) at 13 Rue du Prado. 13 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Systems from 1998 are still on the register. Local 5G started with Bouygues Telecom in November 2020; Orange followed in December 2020, Free Mobile followed in December 2020. 2014 was the busiest year, with 34 new systems, most of them 4G.

ANFR lists a 58 m water tower at Chem du Château D'Eau as the tallest structure. The median height of measured supports is 20 m.

Only one mast carries all four networks; 6 supports carry only Bouygues Telecom.

On 3.5 GHz, the fastest 5G band: Orange on all 8 masts, Free Mobile on all 6 masts, Bouygues Telecom on 5 of its 9 masts and SFR on all 5 masts. 5G is on 100% of masts here, against 87% across Hérault towns with five or more masts.

Nearby, Le Cres (3.3 km to the north-east) has only 9 masts.

Among the 31 Hérault towns with at least five masts, Castelnau-le-Lez ranks 6th by mast count. With 19 masts for 26,058 residents, or 7 per 10,000, it has fewer masts per inhabitant than the median for those towns (11).

Figures above cover installations declared to ANFR as in service or technically operational, as of October 2026; approved projects are not counted.