Switzerland Doesn't Use ZIP Codes—It Uses 4-Digit Postal Codes

Switzerland has no "ZIP code" system. Instead, Swiss Post assigns a four-digit numeric postal code to each delivery district (e.g., 8000 Zürich, 3000 Bern, 1200 Genève). Format: CH-xxxx for international mail. The first digit broadly indicates region (1=West, 2=Central, 3=Bern, 4=Basel, 5=NE, 6=Central East, 7=SE, 8=Zürich, 9=East).