Cell towers in Cachan (Val-de-Marne)

Most of the town's 16 masts are buildings (13); 1 road gantry make up the rest of the mix.

Masts stand at Cite Jardins, 53-55 avenue Aristide Briand, 9 Rue de Provigny, 60 Rue Camille Desmoulins, 4 rue du Docteur Gosselin and 6 allée Gustave Courbet.

2 masts belong to the commune itself and 1 to TDF; the rest sit mainly on private buildings.

Systems from 1994 are still on the register. Local 5G started with Bouygues Telecom in November 2020; Orange followed in December 2020, SFR followed in December 2020. 2013 was the busiest year, with 32 new systems, most of them 4G.

Over the past 12 months ANFR recorded 9 new systems here. Approved additions not yet in service are pending on 3 existing masts, for example Bouygues Telecom (5G 2100 MHz) at 4 rue du Docteur Gosselin, Free Mobile (4G and 5G, including 5G at 3.5 GHz) at Cite Jardins and SFR (5G 2100 MHz) at 3 Rue des Peupliers. 14 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Most antennas sit on rooftops (13 of 16), so heights stay modest; the tallest support is 62 m at 6 allée Gustave Courbet.

On 3.5 GHz, the fastest 5G band: Bouygues Telecom on 7 of its 8 masts, Free Mobile on all 7 masts, Orange on all 5 masts and SFR on 5 of its 6 masts.

Arcueil lies 499 m to the north-west and has only 12 masts.

Only one mast carries all four networks; 4 supports carry only Bouygues Telecom.

At 3 km² with 31,103 residents, the commune is dense enough that most antennas sit on rooftops rather than pylons. It is part of the Métropole du Grand Paris intercommunal grouping.

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