Cell towers in Aulnay-sous-Bois

2 supports are declared underground, in a gallery or a tunnel. For questions about exposure, see the exposure guide.

Declared supports include 2 underground or tunnel sites, 2 camouflaged "tree" pylons and 1 bridge or viaduct, with buildings making up most of the remainder.

Declared locations include 17 rue des Petits Ponts, Les Mardelles, La Rose des Vents, Les Etangs, Le Haut de Galy and place Roger Vaillant.

2014 was the busiest year, with 130 new systems, most of them 4G. Bouygues Telecom switched on the first 5G here in November 2020; SFR followed in December 2020, Free Mobile followed in December 2020. The oldest transmitter still listed here goes back to 1994.

23 systems were switched on in the past 12 months. Approved additions not yet in service are pending on 14 existing masts, for example Bouygues Telecom (5G 3.5 GHz) at 205 avenue de Nonneville, Bouygues Telecom (5G 2100 MHz) at 2 rue Auguste Renoir and Bouygues Telecom (5G 2100 MHz) at 1 rue des Mimosas. 41 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

53 of the 67 masts are rooftop-mounted. The tallest support is 83 m at 2 Allee du Docteur Laennec (building). The median height of measured supports is 23 m.

Of the 67 masts in the commune, 2 masts carry all four networks.

By mast count, Aulnay-sous-Bois is 2nd of the 36 Seine-Saint-Denis towns that have five or more. With 67 masts for 87,599 residents, or 8 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 19 of its 22 masts, Bouygues Telecom on 17 of its 27 masts, Orange on 17 of its 21 masts and SFR on 14 of its 23 masts.

Le Blanc-Mesnil lies 2.4 km to the west and has only 40 masts.

At 16 km² with 87,599 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.

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