Postal codes in Switzerland and Liechtenstein
The countries use four-digit numeric post codes, sorted by geographical location (from north to south, following railways and post car routes).
The Swiss postal codes are assigned geographically, from west to east. They don't follow political divisions (cantons, districts), but they follow a routing allocation, following railways and post car routes. The postal code of big cities finish with 00, and it is not allocated if in the region there isn't a big center.
Today, the third digit has no real meaning anymore. In the past, mail was assigned to fixed railway or truck routes, but modern logistics do not need this practice anymore.
Postal codes of
As special cases: