Shape, check digit, accepted and refused examples and the API call for Organisationsnummer in Sweden. Every example on this page is run through the same validators as the free identifier validator, so a value shown as accepted is a value the validator accepts.
| Field | Value |
|---|---|
| Register | Bolagsverket |
| Shape | N{6}-N{3} C |
| Check digit | Enforced. Luhn (mod 10) over the 10 digits, and the third digit must be 2 or higher. |
| Worked example (accepted) | 556012-5790 |
| Normalised form | 556012-5790 |
| Also accepted as input | 5560125790 |
| A one-character slip | 556012-5791 is refused |
| Regex (normalised form) | ^[0-9]{6}-[0-9]{4}$ |
| API call | GET /companies/search?country=SE&company_number=556012-5790 |
| VAT number | SE + 10 digits + 01 — built from the identifier by rule; the registration is not confirmed |
A personal identity number (personnummer) has a third digit of 0 or 1 and is refused. Sole traders are never served.
curl "https://api.prometiam.com/functions/v1/risk-api/companies/search?country=SE&company_number=556012-5790" \ -H "Authorization: Bearer YOUR_API_KEY"
Shape notation: N digit · L letter · X digit or letter · C check digit or character · {n} repeat n times.
A valid shape and check digit prove that a number is well-formed, not that a company holds it. Only a lookup in the register answers that.
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