Cell towers in Chateauvillain (Haute-Marne)

Masts stand at Haut de Seulemont, Vaux Maignien, Le Saint-Esprit, Ferme de Marnay and La Borde.

The declared supports are a 55 m pylon, at Haut de Seulemont, for Bouygues Telecom, Free Mobile, Orange and SFR; a 37 m pylon, at Vaux Maignien, for Bouygues Telecom, Orange and SFR; a 31 m pylon, at Le Saint-Esprit, for Bouygues Telecom, Free Mobile and SFR; a 51 m pylon, at Ferme de Marnay, for Free Mobile; a 39 m pylon, at La Borde, for Orange.

The highest support stands 55 m at Haut de Seulemont (pylon). The median is 38 m, above the Haute-Marne median of 34 m.

Fast 3.5 GHz 5G is declared by Free Mobile alone, on 1 of its 3 masts.

Systems from 1992 are still on the register. Free Mobile switched on the first 5G here in May 2021; Orange followed in March 2025, SFR followed in October 2025. 2025 was the busiest year, with 13 new systems, most of them 4G.

Approved additions not yet in service are pending on 2 existing masts, for example Free Mobile (4G 800 MHz) at Haut de Seulemont and Orange (4G and 5G) at Vaux Maignien. 1 Bouygues Telecom 5G transmitter is listed as technically operational — installed, but not yet declared commercially in service.

Among the 5 Haute-Marne towns with at least five masts, Chateauvillain ranks 4th by mast count.

The widest declared gap between neighbouring supports is about 3.3 km, to the south-west of the centre.

Ville-sous-la-Ferte lies 13 km to the north-west and has 5 masts declared.

Only one mast carries all four networks.

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