The Y-tunnus format
The Y-tunnus is written with 7 digits, a hyphen, then 1 check digit: 0112038-9. The last digit is a modulo-11 check computed on the first seven. An older number may have fewer than 7 digits before the hyphen: the leading zero is then often left out.
GET /v2/companies/FI-01120389 returns the record with its status. The Discovery plan (free) includes this route. See Pricing.Accepted spellings
The same number circulates in several forms: 0112038-9, 01120389, FI01120389 and 112038-9. Jsonpage accepts them all and reduces them to the global identifier FI-01120389: the country code, then the 8 characters without the hyphen.
The link with Finnish VAT
The Finnish VAT number is FI followed by the 8 digits of the Y-tunnus without the hyphen: FI01120389. For other VAT formats, see French VAT number: format and how to check it.
With Jsonpage
To check a Finnish company, query its record:
curl "https://api.jsonpage.com/v2/companies/FI-01120389?include=address,vat" \
-H "X-API-Key: $JSONPAGE_API_KEY"Establishments are not available for Finland, and the closing date stays empty for an entity that left the register.
Frequently asked questions
How many digits does a Y-tunnus have?+
Eight in total: seven digits, a hyphen and a modulo-11 check digit.
Is the hyphen part of the number?+
It is there for readability. In the Jsonpage global identifier it is removed: FI-01120389.
What does Finnish VAT look like?+
FI followed by the 8 digits of the Y-tunnus, without the hyphen, for example FI01120389.
Does a correct check digit prove the company exists?+
No. It rules out typing mistakes, but you need to look the company up to know whether it exists and its status.
Keep reading
- NORWAYNorwegian organisation number: format and how to check it9 digits and a modulo-11 check, the MVA suffix of Norwegian VAT, establishments and how to check a company.
- VATFrench VAT number: format and how to check itThe French, Belgian and Swiss formats, the mentions on the invoice and the check before invoicing.
- BELGIUMBelgian enterprise number: format and how to check it10 digits starting with 0 or 1, the link with Belgian VAT, establishment units and how to check it.