The postal codes of Swiss cantons:
 1xxx - Region Western Switzerland (South)
 10xx - Region Lausanne, Echallens (North-West)
 11xx - Region Morges, Rolle
 12xx - Canton of Geneva and Region Nyon
 13xx - Region between Lausanne and Yverdon, Jura side (Cossonay, Orbe, Vallorbe)
 14xx - Yverdon, Estavayer-le-Lac (VD/FR)
 15xx - Moudon, Lucens, Avenches (VD/FR)
 16xx - Romont, Bulle (VD/FR)
 17xx - Region Fribourg to Lake Murten (Münchenwiler)
 18xx - Eastern shore of Lake Geneva (Vevey, Montreux), Chablais (Aigle, Monthey, St. Maurice VD/VS)
 19xx - Lower Valais (Martigny, Sion) without Region Sierre
 2xxx - Region Western Switzerland (North)
 20xx - Region Neuchâtel
 21xx - Val de Travers NE
 22xx - Upper Val de Ruz,
 23xx - La Chaux-de-Fonds, Franches-Montagnes
 24xx - Le Locle, La Sagne
 25xx - Region Biel/Bienne, Lake Biel, Grenchen
 26xx - Vallon de St. Imier
 27xx - Bernese Jura (Tavannes, Tramelan, Moutier, Franches Montagnes)
 28xx - Delémont
 29xx - Ajoie (Porrentruy)
 3xxx - Region Berne/Upper Valais
 30xx - City of Bern and agglomeration
 31xx - Southern agglomeration of Berne
 32xx - Seeland (Aarberg, Ins, Kerzers, Lyss)
 33xx - Region between Berne and Solothurn
 34xx - Region Burgdorf, Oberaargau (except Langenthal)
 35xx - Emmental
 36xx - Region Thun
 37xx - Region Spiez, Simmental
 38xx - Region Interlaken, Haslital
 39xx - Upper Valais with region Sierre, Crans Montana
 4xxx - Region Basel
 40xx - City of Basel
 41xx - Leimental, Birstal, Riehen, Bettingen, Pratteln
 42xx - Laufental, Schwarzbubenland
 43xx - Western Fricktal (Rheinfelden, Stein AG)
 44xx - Basel-Country
 45xx - Region Solothurn
 46xx - Region Olten
 47xx - Region Oensingen, Balsthal
 48xx - Region Zofingen
 49xx - Region Langenthal
 5xxx - Region Aarau
 50xx - City of Aarau and Region, eastern Fricktal (Frick, Laufenburg)
 51xx - Region Wildegg, Schinznach
 52xx - Region Brugg, Mettauertal
 53xx - Region Turgi to Koblenz
 54xx - Region Baden, Wettingen
 55xx - Region Mellingen
 56xx - Region Lenzburg, Wohlen, Bremgarten, Muri (Freiamt)
 57xx - Region Kulm, Beinwil, Kölliken, Safenwil
 6xxx - Region Central Switzerland (Innerschweiz), Tessin
 60xx - Region Lucerne, Obwalden
 61xx - Entlebuch, Willisau
 62xx - Region Sempach, Sursee, Hochdorf
 63xx - Canton of Zug, Nidwalden
 64xx - Canton of Schwyz (except Ausserschwyz), Canton of Uri
 65xx - Region Bellinzona, Misox, Val Calanca (GR)
 66xx - Locarno, Valle Maggia, Val Verzasca
 67xx - Leventina, Val Blenio
 68xx - Mendrisotto
 69xx - Region Lugano
 7xxx - Region Graubünden
 70xx - Chur, Schanfigg (Arosa), Domat/Ems, Flims
 71xx - Bündner Oberland
 72xx - Prättigau, Davos
 73xx - Bündner Herrschaft, Landquart, Sargans
 74xx - Hinterrhein, Albula
 75xx - Engadin, Val Müstair
 76xx - Bergell
 77xx - Poschiavo
 8xxx - Region Zürich
 80xx - City of Zürich
 81xx - Region Zürcher Unterland
 82xx - Region Schaffhausen, Kreuzlingen
 83xx - Kloten, Zürcher Oberland, Hinwil, Hinterthurgau
 84xx - Region Winterthur, Tösstal
 85xx - Region Frauenfeld, Weinfelden, Amriswil, Romanshorn
 86xx - Region Dübendorf, Zürcher Oberland, See (SG)
 87xx - Region Right shore of Lake Zürich, Gaster/See (SG), Canton Glarus
 88xx - Region Linkes Zürichseeufer, Ausserschwyz (March, Höfe, Einsiedeln SZ), Glarner Unterland, Sarganserland/Lake Walen
 89xx - Region Limmattal, Albis, Knonauer Amt, Kelleramt (eastermost Aargau)
 9xxx - Region Eastern Switzerland (Ostschweiz)
 90xx - Region St. Gallen, Appenzell
 91xx - Region Herisau
 92xx - Region Gossau, Flawil, Uzwil, Bischofszell
 93xx - Region Arbon
 94xx - Region Rorschach, Rheintal, Liechtenstein
 95xx - Region Wil
 96xx - Toggenburg

Switzerland
Switzerland