IBANs for United Kingdom with a valid mod-97 (ISO 7064) check digit and the correct length — they pass IBAN validation libraries. Synthetic account portion.
GB15HBUK40529518089952| Browser | sampuli.site — pick United Kingdom, generate, export CSV/JSON |
| REST API | curl https://sampuli.site/api/v1/gb/iban?n=25 |
| npm | npx @sampuli/data gb.iban |
| Node | import { generate } from '@sampuli/data'; generate('gb.iban') |