Cell towers in Massy (Essonne)

Most declared azimuths point outward, along a corridor or valley rather than at the centre. 6 supports are declared underground, in a gallery or a tunnel. For questions about exposure, see the exposure guide.

6 underground or tunnel sites and 34 buildings, 4 pylons and 1 bridge or viaduct carry the commune's antennas.

Declared locations include Allée Emile Zola - Quartier Vi, Les Goachères, 45 rue de la Division Leclerc, Le Vieux Chat, 10 Rue Paul Emile Victor and Rue Division Leclerc.

32 systems were switched on in the past 12 months. ANFR has approved one new site that is not live yet, plus additions on 13 existing masts. New: Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 20 Avenue Saint Marc. 20 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

2013 was the busiest year, with 55 new systems, most of them 4G. Local 5G started with Bouygues Telecom in November 2020; Free Mobile followed in December 2020, SFR followed in March 2021. The oldest transmitter still listed here goes back to 1995.

34 of the 45 masts are rooftop-mounted. The tallest support is 52 m at Allée Emile Zola - Quartier Vi (building). The median height of measured supports is 26 m.

By mast count, Massy is 2nd of the 60 Essonne towns that have five or more. With 45 masts for 51,729 residents, or 9 per 10,000, it has more masts per inhabitant than the median for those towns (7).

3.5 GHz 5G is declared by Free Mobile on 14 of its 15 masts, Bouygues Telecom on 10 of its 19 masts, Orange on 10 of its 11 masts and SFR on 7 of its 16 masts. 76% of the town's masts carry 5G, fewer than across Essonne towns with five or more masts (88%).

Verrieres-le-Buisson lies 2.4 km to the north-west and has only 12 masts.

At 9 km² with 51,729 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.

Source: operator declarations to ANFR, as of October 2026. Projects that are only approved are left out of the totals.