IBANs for Switzerland with the correct country code, length and a valid ISO 7064 mod-97 check — they pass IBAN validators. The account portion is synthetic.
CH2809000033639558417| Browser | sampuli.site — pick Switzerland, generate, export CSV/JSON |
| REST API | curl https://sampuli.site/api/v1/ch/account?n=25 |
| npm | npx @sampuli/data ch.account |
| Node | import { generate } from '@sampuli/data'; generate('ch.account') |