Cell towers in Saint-Chaffrey (Hautes-Alpes)

Declared locations include Sommet de Serre Chevalier, Queyrets et Peyrons, Village Club and Serre Ratier.

Inventory: an 11 m pylon, at Sommet de Serre Chevalier, for Orange; a 21 m building, at Queyrets et Peyrons, for Orange; a 12 m mast, at Village Club, for Orange; a 12 m building, for Bouygues Telecom and SFR; a 25 m pylon, at Serre Ratier, for Bouygues Telecom, Free Mobile, Orange and SFR.

The highest support stands 25 m at Serre Ratier (pylon). The median is 12 m, slightly below the Hautes-Alpes median of 19 m.

3.5 GHz 5G is declared by Orange on 3 of its 4 masts, Bouygues Telecom on 2 of its 3 masts and SFR on all 2 masts. Free Mobile only has 5G on 700 MHz — longer reach, lower speed. 67% of the town's masts carry 5G, fewer than across Hautes-Alpes towns with five or more masts (81%).

2018 was the busiest year, with 15 new systems, most of them 4G. Orange opened 5G here in April 2022; SFR followed in October 2022, Bouygues Telecom followed in October 2022. The oldest transmitter still listed here goes back to 2003.

Approved additions not yet in service are pending on one existing mast, for example SFR (2G and 3G) at Serre Ratier. 4 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Of the 6 masts in the commune, only one mast carries all four networks, and Orange is the only carrier on 3 masts.

Supports leave a gap of about 2.2 km to the west of the centre.

Villeneuve lies 4 km to the north-west and has a higher 5G share (100%).

Most of the town's 6 masts are buildings (3).

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