Cell towers in Saint-Herblain

Most of the town's 43 masts are pylons (25); 1 church or religious building make up the rest of the mix.

Declared locations include Le Sillon de Bretagne, La Chauviniere, Z.i. de la Loire, La Rabotière, Zone Artisanale de la Béhinière and Moulin de la Rousselière.

42 systems were switched on in the past 12 months. ANFR has approved 4 new sites that are not live yet, plus additions on 12 existing masts. New: Free Mobile (4G) at boulevard Salvador Allende, Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 16 Rue D'Aquitaine and Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 15 Avenue Alain Gerbault. 22 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

2013 was the busiest year, with 90 new systems, most of them 4G. Bouygues Telecom switched on the first 5G here in November 2020; Orange followed in March 2021, SFR followed in April 2021. The oldest transmitter still listed here goes back to 1997.

ANFR lists a 135 m building at Le Sillon de Bretagne as the tallest structure. The median height of measured supports is 30 m.

Of the 43 masts in the commune, 2 masts carry all four networks.

By mast count, Saint-Herblain is 3rd of the 65 Loire-Atlantique towns that have five or more.

3.5 GHz 5G is declared by Orange on 16 of its 18 masts, Free Mobile on 14 of its 15 masts, SFR on 11 of its 15 masts and Bouygues Telecom on 8 of its 16 masts.

La Montagne lies 3.5 km to the south-west and has only 5 masts.

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