Cell towers in Seignosse (Landes)

1 water tower and 4 pylons carry the commune's antennas.

Antennas are listed at Le Penon, avenue des Lacs, rue du Château D'Eau, Fourneuf and rue des Artisans.

The declared supports are a 36 m pylon, at Le Penon, for Bouygues Telecom, Orange and SFR; a 38 m pylon, at avenue des Lacs, for Bouygues Telecom, Free Mobile, Orange and SFR; a 39 m water tower, at rue du Château D'Eau, for Bouygues Telecom, Orange and SFR; a 43 m pylon, at Fourneuf, for Free Mobile; a 40 m pylon, at rue des Artisans, for Bouygues Telecom, Free Mobile and SFR.

ANFR lists a 43 m pylon at Fourneuf as the tallest structure. The median height of measured supports is 39 m.

Systems from 2000 are still on the register. Local 5G started with Free Mobile in December 2020; Bouygues Telecom followed in December 2021, SFR followed in January 2022. 2022 was the busiest year, with 22 new systems, most of them 5G.

Approved additions not yet in service are pending on one existing mast, for example Bouygues Telecom (5G, including 5G at 3.5 GHz) at rue du Château D'Eau. 6 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

On 3.5 GHz, the fastest 5G band: SFR on all 4 masts, Bouygues Telecom on 3 of its 4 masts, Free Mobile on all 3 masts and Orange on all 3 masts.

3.3 km to the south-west, neighbouring Soorts has less 5G (83%).

The widest declared gap between neighbouring supports is about 1.7 km, to the west of the centre.

Only one mast carries all four networks.

Among the 28 Landes towns with at least five masts, Seignosse ranks 25th by mast count.

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