Cell towers in Coignieres (Yvelines)

Masts stand at Shurgard Coignières 1, 8 rue du Pont des Landes, 44 Rue des Broderies, 1 allée des Essaims, 27 Rue des Osiers and 27 Rue des Osier.

ANFR has approved one new site that is not live yet. New: Bouygues Telecom (2G, 3G and 4G) at L'Etang des Osiers. 8 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Systems from 2000 are still on the register. Local 5G started with Bouygues Telecom in November 2020; Free Mobile followed in May 2021, SFR followed in September 2021. 2018 was the busiest year, with 22 new systems, most of them 4G.

The highest support stands 32 m at Shurgard Coignières 1 (pylon). The median height of measured supports is 24 m.

4 supports carry only Bouygues Telecom.

Among the 62 Yvelines towns with at least five masts, Coignieres ranks 25th by mast count. With 11 masts for 4,321 residents, or 25 per 10,000, it has more masts per inhabitant than the median for those towns (7).

On 3.5 GHz, the fastest 5G band: Bouygues Telecom on all 4 masts, Free Mobile on all 4 masts, Orange on all 4 masts and SFR on all 2 masts.

Nearby, La Verriere (1.9 km to the east) has only 6 masts.

6 buildings and 5 pylons carry the commune's antennas.

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