Cell towers in Milly-la-Foret (Essonne)

1 water tower and 5 pylons and 1 building carry the commune's antennas.

Antennas are listed at La Saule aux Merles, Centre de Secours Sdis91, RTE de Fontainebleau, La Grosse Roche, rue du Chênet and Le Coudret.

On 3.5 GHz, the fastest 5G band: Orange on 3 of its 4 masts, Bouygues Telecom on 1 of its 3 masts and SFR on 1 of its 3 masts. No 3.5 GHz from Free Mobile here, only 700 MHz.

Systems from 1997 are still on the register. Free Mobile switched on the first 5G here in December 2020; SFR followed in October 2023, Bouygues Telecom followed in October 2023. 2019 was the busiest year, with 15 new systems, most of them 4G.

Over the past 12 months ANFR recorded 13 new systems here. Approved additions not yet in service are pending on one existing mast, for example Free Mobile (4G 2100 MHz). 3 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

The tallest structure is a 54 m water tower at rue du Chênet. The median height of measured supports is 28 m.

Only one mast carries all four networks; 3 supports carry only Orange.

Among the 60 Essonne towns with at least five masts, Milly-la-Foret ranks 45th by mast count. With 7 masts for 4,562 residents, or 15 per 10,000, it has more masts per inhabitant than the median for those towns (7).

Ballancourt-sur-Essonne lies 15 km to the north-west and has a higher 5G share (100%).

The widest declared gap between neighbouring supports is about 3.9 km, to the west of the centre.

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