Postal codes (postcode / ZIP) in Switzerland's real format — the correct length and layout for address forms and field-level validation. In a full record the postcode matches the one inside the address. Entirely synthetic.
5105| Browser | sampuli.site — pick Switzerland, generate, export CSV/JSON |
| REST API | curl https://sampuli.site/api/v1/ch/postcode?n=25 |
| npm | npx @sampuli/data ch.postcode |
| Node | import { generate } from '@sampuli/data'; generate('ch.postcode') |