Cell towers in Montbert (Loire-Atlantique)

Declared locations include La Pommeraie, La Grande Masse, Les Cantons, La Raye and Bel Air.

Inventory: a 38 m pylon, at La Pommeraie, for Free Mobile and Orange; a 37 m pylon, at La Grande Masse, for Free Mobile and Orange; a 37 m pylon, at Les Cantons, for Free Mobile; a 30 m pylon, at La Raye, for Bouygues Telecom and SFR; a 31 m pylon, at Bel Air, for Orange.

No mast is operator-owned: Totem has 3, Hivory has 1 and On Tower France has 1.

3.5 GHz 5G is declared by Orange on all 3 masts, Bouygues Telecom on its only mast and SFR on its only mast. Free Mobile only has 5G on 700 MHz — longer reach, lower speed. 100% of the town's masts carry 5G, more than across Loire-Atlantique towns with five or more masts (86%).

2025 was the busiest year, with 11 new systems, most of them 4G. Local 5G started with Free Mobile in February 2021; Bouygues Telecom followed in January 2022, SFR followed in January 2022. The oldest transmitter still listed here goes back to 2011.

The tallest structure is a 38 m pylon at La Pommeraie. The median is 37 m, above the Loire-Atlantique median of 32 m.

Supports leave a gap of about 3.1 km to the north-east of the centre. Most declared azimuths point outward, along a corridor or valley rather than at the centre.

Nearby, La Chevroliere (10 km to the west) has less 5G (83%).

2 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Of the 5 masts in the commune, 3 of the 5 masts host at least two operators.

By mast count, Montbert is 56th of the 65 Loire-Atlantique towns that have five or more. With 5 masts for 3,388 residents, or 15 per 10,000, it has more masts per inhabitant than the median for those towns (8).

Of the 53 systems declared here, 12 are installed but not yet in commercial service (ANFR, as of October 2026).