Cell towers in Mont-Saint-Aignan

1 water tower and 10 buildings, 7 pylons and 1 church or religious building carry the commune's antennas.

Antennas are listed at 1 rue Lefort Gonssolin, Square René le Prévost de la Moissonniere, Les Coquets, La Vatine, rue Boucicaut/rue Messyre D'Andlau and Route D'Houppeville.

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

Systems from 1998 are still on the register. Bouygues Telecom opened 5G here in November 2020; Free Mobile followed in February 2021, Orange followed in March 2021. 2013 was the busiest year, with 41 new systems, most of them 4G.

Over the past 12 months ANFR recorded 24 new systems here. Approved additions not yet in service are pending on 6 existing masts, for example Free Mobile (4G and 5G, including 5G at 3.5 GHz) at rue Boucicaut/rue Messyre D'Andlau, Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 7 boulevard André Siegfried and Orange (3G and 5G) at 28 Rue Thomas Becket. 13 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

ANFR lists a 62 m building at 2 rue Thomas Beckett as the tallest structure. The median height of measured supports is 27 m.

On 3.5 GHz, the fastest 5G band: Orange on all 7 masts, Bouygues Telecom on 6 of its 7 masts, Free Mobile on 5 of its 6 masts and SFR on 4 of its 7 masts.

Rouen lies 2.3 km to the south and has 94 masts, more than here.

Among the 30 Seine-Maritime towns with at least five masts, Mont-Saint-Aignan ranks 7th by mast count. With 19 masts for 20,165 residents, or 9 per 10,000, it has more masts per inhabitant than the median for those towns (8).

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