| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 21 | Lausanne | Vaud | 116,751 | Switzerland | Europe/Zurich |
| 22 | Geneva | Canton of Geneva | 183,981 | Switzerland | Europe/Zurich |
| 24 | Yverdon-les-Bains | Vaud | 23,702 | Switzerland | Europe/Zurich |
| 26 | Fribourg | Canton of Fribourg | 32,827 | Switzerland | Europe/Zurich |
| 27 | Sion, Switzerland | Valais | 28,045 | Switzerland | Europe/Zurich |
| 31 | Bern | Canton of Bern | 121,631 | Switzerland | Europe/Zurich |
| 32 | Biel/Bienne | Canton of Bern | 48,614 | Switzerland | Europe/Zurich |
| 33 | Thun | Canton of Bern | 42,136 | Switzerland | Europe/Zurich |
| 34 | Burgdorf, Switzerland | Canton of Bern | 14,788 | Switzerland | Europe/Zurich |
| 41 | Lucerne | Canton of Lucerne | 57,066 | Switzerland | Europe/Zurich |
| 43 | Zürich | Canton of Zürich | 341,730 | Switzerland | Europe/Zurich |
| 44 | Zürich | Canton of Zürich | 341,730 | Switzerland | Europe/Zurich |
| 52 | Winterthur | Canton of Zürich | 91,908 | Switzerland | Europe/Zurich |
| 55 | Rapperswil, Bern | Canton of Bern | — | Switzerland | Europe/Zurich |
| 56 | Baden, Switzerland | Aargau | 16,118 | Switzerland | Europe/Zurich |
| 61 | Basel | Basel-Stadt | 164,488 | Switzerland | Europe/Zurich |
| 62 | Olten | Canton of Solothurn | 16,411 | Switzerland | Europe/Zurich |
| 71 | St. Gallen | Canton of St. Gallen | 70,572 | Switzerland | Europe/Zurich |
| 74 | — | — | 7,581,000 | Switzerland | Europe/Zurich |
| 76 | — | — | 7,581,000 | Switzerland | Europe/Zurich |
| 77 | — | — | 7,581,000 | Switzerland | Europe/Zurich |
| 78 | — | — | 7,581,000 | Switzerland | Europe/Zurich |
| 79 | — | — | 7,581,000 | Switzerland | Europe/Zurich |
| 81 | Chur | Graubünden | 32,429 | Switzerland | Europe/Zurich |
| 91 | Lugano | Ticino | 26,365 | Switzerland | Europe/Zurich |