Cell towers in Tonnerre (Yonne)

Masts stand at Boussemis, Terres de Marsoif, Ferme du Val St-Nicolas, Les Champs Carrés, Les Mulots and Les Bauclairs.

The tallest structure is a 50 m pylon at Boussemis. The median is 38 m, above the Yonne median of 32 m.

Systems from 1998 are still on the register. Free Mobile opened 5G here in December 2020; Bouygues Telecom followed in October 2023, SFR followed in December 2023. 2023 was the busiest year, with 19 new systems, most of them 5G.

Over the past 12 months ANFR recorded 27 new systems here. Approved additions not yet in service are pending on 3 existing masts, for example Bouygues Telecom (4G and 5G) at Les Bauclairs, Bouygues Telecom (3G 900 MHz) at Terres de Marsoif and Free Mobile (4G and 5G) at Le Val St Nicolas. 5 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Among the 14 Yonne towns with at least five masts, Tonnerre ranks 3rd by mast count. With 11 masts for 4,261 residents, or 26 per 10,000, it has more masts per inhabitant than the median for those towns (16).

On 3.5 GHz, the fastest 5G band: Orange on 2 of its 5 masts, Bouygues Telecom on 1 of its 5 masts, Free Mobile on 1 of its 3 masts and SFR on 1 of its 5 masts.

Moneteau lies 29 km to the west and has only 5 masts.

The widest declared gap between neighbouring supports is about 1.8 km, to the south of the centre.

3 supports carry only Orange.

4,261 residents over 59 km²: supports are mostly pylons, not rooftops. It is part of the CC Le Tonnerrois en Bourgogne intercommunal grouping.

9 pylons and 2 buildings carry the commune's antennas.

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