Cell towers in Arzon (Morbihan)

1 lighthouse or signal station and 5 pylons, 1 building and 1 camouflaged "tree" pylon carry the commune's antennas.

Place names on the register include Le Plancho, Kerjouanno, Complexe Sportif Yves Chapron, Mairie, Chemin du Goh Velenec and Port du Crouesty.

ANFR lists a 37 m lighthouse or signal station at Port du Crouesty as the tallest structure. The median is 26 m, slightly below the Morbihan median of 35 m.

The commune owns 2 of the 8 masts, Totem owns 2.

2023 was the busiest year, with 21 new systems, most of them 5G. Local 5G started with Free Mobile in September 2021; Orange followed in July 2022, Bouygues Telecom followed in March 2023. The oldest transmitter still listed here goes back to 1998.

Approved additions not yet in service are pending on 2 existing masts, for example Orange (5G 700 MHz) at Le Plancho and SFR (3G 900 MHz) at Complexe Sportif Yves Chapron. 6 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Of the 8 masts in the commune, only one mast carries all four networks, and Orange is the only carrier on 3 masts.

By mast count, Arzon is 9th of the 35 Morbihan towns that have five or more. With 8 masts for 2,271 residents, or 35 per 10,000, it has more masts per inhabitant than the median for those towns (10).

3.5 GHz 5G is declared by Orange on all 4 masts, Bouygues Telecom on all 3 masts, SFR on all 3 masts and Free Mobile on 2 of its 3 masts. 100% of the town's masts carry 5G, more than across Morbihan towns with five or more masts (87%).

Nearby, Sarzeau (9.8 km to the east) has 12 masts, more than here.

2,271 residents over 9 km²: supports are mostly pylons, not rooftops.

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