Solothurn - postal codes
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| Place | Code | Country | Admin1 | Admin2 | Admin3 |
| 1 | Nunningen | 4208 | Switzerland | Solothurn | Bezirk Thierstein | Nunningen |
| 47.4/7.6 |
| 2 | Breitenbach | 4226 | Switzerland | Solothurn | Bezirk Thierstein | Breitenbach |
| 47.4/7.55 |
| 3 | Büsserach | 4227 | Switzerland | Solothurn | Bezirk Thierstein | Büsserach |
| 47.383/7.533 |
| 4 | Erschwil | 4228 | Switzerland | Solothurn | Bezirk Thierstein | Erschwil |
| 47.367/7.533 |
| 5 | Zullwil | 4234 | Switzerland | Solothurn | Bezirk Thierstein | Zullwil |
| 47.383/7.6 |
| 6 | Kleinlützel | 4245 | Switzerland | Solothurn | Bezirk Thierstein | Kleinlützel |
| 47.433/7.417 |
| 7 | Fehren | 4232 | Switzerland | Solothurn | Bezirk Thierstein | Fehren |
| 47.383/7.6 |
| 8 | Meltingen | 4233 | Switzerland | Solothurn | Bezirk Thierstein | Meltingen |
| 47.383/7.6 |
| 9 | Grindel | 4247 | Switzerland | Solothurn | Bezirk Thierstein | Grindel |
| 47.428/7.456 |
| 10 | Bärschwil | 4252 | Switzerland | Solothurn | Bezirk Thierstein | Bärschwil |
| 47.383/7.467 |
| 11 | Himmelried | 4204 | Switzerland | Solothurn | Bezirk Thierstein | Himmelried |
| 47.417/7.583 |
| 12 | Beinwil SO | 4229 | Switzerland | Solothurn | Bezirk Thierstein | Beinwil (SO) |
| 47.408/7.531 |
| 13 | Bärschwil Dorf | 4252 | Switzerland | Solothurn | Bezirk Thierstein | Bärschwil |
| 47.383/7.467 |
Aargau,
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Bern,
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Neuchâtel,
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St. Gallen,
Schaffhausen,
Solothurn,
Schwyz,
Thurgau,
Ticino,
Uri,
Vaud,
Valais,
Zug,
Zurich,
Bezirk Gäu,
Bezirk Thal,
Bezirk Bucheggberg,
Bezirk Dorneck,
Bezirk Gösgen,
Bezirk Wasseramt,
Bezirk Lebern,
Bezirk Olten,
Bezirk Solothurn,
Bezirk Thierstein,