Cell towers in Saint-Louis (Haut-Rhin)

Most of the town's 12 masts are buildings (9); 2 churches or religious buildings make up the rest of the mix.

Declared locations include 2 Avenue de Bâle / 1 Rue de Huningue, Euroairport, 9001 Aéroport Bâle Mulhouse, Clinique des 3 Frontières, 30 Rue des Trois Lys and 11 Rue Charles Peguy.

22 systems were switched on in the past 12 months. ANFR has approved one new site that is not live yet, plus additions on 6 existing masts. New: Orange (4G and 5G, including 5G at 3.5 GHz) at 10 Place de la Gare. 6 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

2025 was the busiest year, with 27 new systems, most of them 5G. Free Mobile opened 5G here in December 2020; Orange followed in June 2022, SFR followed in September 2025. The oldest transmitter still listed here goes back to 1998.

9 of the 12 masts are rooftop-mounted. The tallest support is 50 m at 2 rue de la Gare (building). The median height of measured supports is 31 m.

Of the 12 masts in the commune, 2 masts carry all four networks, and Orange is the only carrier on 3 masts.

3.5 GHz 5G is declared by Bouygues Telecom on 4 of its 6 masts, Free Mobile on 4 of its 6 masts, Orange on 4 of its 6 masts and SFR on 3 of its 5 masts.

Nearby, Rixheim (21 km to the north-west) has only 9 masts.

Most declared azimuths point outward, along a corridor or valley rather than at the centre.

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