| PLZ | Ortschaft | Betriebe |
| 9055 | Bühler | 8 |
| 9056 | Gais | 18 |
| 9035 | Grub | 5 |
| 9410 | Heiden | 26 |
| 9100 | Herisau | 67 |
| 9064 | Hundwil | 10 |
| 9428 | Lachen → Walzenhausen | |
| 9426 | Lutzenberg | 2 |
| 9038 | Rehetobel | 13 |
| 9411 | Reute | 4 |
| 9414 | Schachen bei Reute | 1 |
| 9105 | Schönengrund | 12 |
| 9107 | Schwägalp → Urnäsch | |
| 9103 | Schwellbrunn | 13 |
| 9042 | Speicher | 12 |
| 9037 | Speicherschwendi | 3 |
| 9063 | Stein | 8 |
| 9053 | Teufen | 20 |
| 9043 | Trogen | 10 |
| 9107 | Urnäsch | 24 |
| 9044 | Wald | 7 |
| 9104 | Waldstatt | 9 |
| 9428 | Walzenhausen | 10 |
| 9405 | Wienacht | 2 |
| 9427 | Wolfhalden | 9 |
| 9427 | Zelg → Wolfhalden | |