Cell towers in Sens (Yonne)

Most of the town's 21 masts are pylons (11); 1 church or religious building make up the rest of the mix.

Place names on the register include 82 Rue du 89 Ème Régiment D'Infanterie, 5 Rue des Champs Pluviers, Les Bégamus, Plaine Champbertrand, Avenue de Sénigallia and Champbertrand.

8 systems were switched on in the past 12 months. ANFR has approved 2 new sites that are not live yet, plus additions on 2 existing masts. New: Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 40 Rue Rene Binet and Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 22 Boulevard de Verdun. 10 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

ANFR lists a 54 m building at 100 rue de la République as the tallest structure. The median is 26 m, slightly below the Yonne median of 32 m.

The commune owns 2 of the 21 masts, On Tower France owns 4.

2021 was the busiest year, with 34 new systems, most of them 5G. Free Mobile switched on the first 5G here in December 2020; SFR followed in November 2021, Bouygues Telecom followed in November 2021. The oldest transmitter still listed here goes back to 1998.

Of the 21 masts in the commune, Free Mobile is the only carrier on 7 masts.

By mast count, Sens is 2nd of the 14 Yonne towns that have five or more. With 21 masts for 27,106 residents, or 8 per 10,000, it has fewer masts per inhabitant than the median for those towns (16).

3.5 GHz 5G is declared by Orange on 8 of its 9 masts, Free Mobile on 7 of its 8 masts, Bouygues Telecom on 5 of its 7 masts and SFR on 5 of its 7 masts.

28 km to the north-west, neighbouring Marolles-sur-Seine has only 5 masts.

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