Cell towers in Longjumeau (Essonne)

Masts stand at 20 avenue du Général de Gaulle, rue des Templiers, rue Maryse Bastie, Résidence Efiat, 12 rue Bertillon and La Butte Rouge.

Systems from 1996 are still on the register. Bouygues Telecom switched on the first 5G here in November 2020; Free Mobile followed in December 2020, Orange followed in December 2020. 2020 was the busiest year, with 20 new systems, most of them 5G.

Over the past 12 months ANFR recorded 9 new systems here. Approved additions not yet in service are pending on 5 existing masts, for example Free Mobile (4G and 5G, including 5G at 3.5 GHz) at La Butte Rouge, Free Mobile (5G 700 MHz) at 26 Rue du Dr Roux and Free Mobile (5G 700 MHz) at Rue Pipien. 11 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Most antennas sit on rooftops (7 of 11), so heights stay modest; the tallest support is 44 m at 84 Rue Pdt François Mitterrand.

4 supports carry only Bouygues Telecom.

On 3.5 GHz, the fastest 5G band: Bouygues Telecom on 5 of its 6 masts, Free Mobile on all 5 masts, Orange on all 3 masts and SFR on all 2 masts.

2.5 km to the south-east, neighbouring Epinay-sur-Orge has a camouflaged "tree" pylon among its supports.

At 5 km² with 21,996 residents, the commune is dense enough that most antennas sit on rooftops rather than pylons. It is part of the CA Communauté Paris-Saclay intercommunal grouping.

Most of the town's 11 masts are buildings (7).

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