The Estonian e-Business Register (e-äriregister, usually called the Äriregister) is the register of companies and other legal entities in Estonia, run by the Centre of Registers and Information Systems (RIK), and it is where the Estonian company records Prometiam serves come from. Every entity in it carries a registry code: eight digits, such as 10060701 for Swedbank AS. The Estonian VAT number (KMKR, EE plus nine digits) is a separate number.
The registry code is eight digits, the first being 1, 7, 8 or 9, and the last a check digit (mod 11, with the weights 1 to 7 and, if the result is 10, the weights 3 to 9). The check is enforced: a code that fails it is refused with a 400 validation error.
The legal form is the register's abbreviation (OÜ, AS, MTÜ, UÜ, TÜ, SA, FIL). The status is registered (active), in liquidation or in bankruptcy. The activity code is EMTAK, in the 2008 or the 2025 version per company.
Company records from the Estonian e-Business Register (RIK): legal name, legal form, status (including liquidation and bankruptcy), registered address, activity code (EMTAK 2008 or 2025, per company) and dates; with register-change events and monitoring, but no officers, no registry-compliance signal and no insolvency notices. Sole traders (FIE, füüsilisest isikust ettevõtja) are never served, and the VAT number (KMKR) is searchable with vat=.
GET /companies/search?company_number=10060701&country=EE returns the record, and vat=EE100354546 reaches a company through its KMKR number where the register publishes it. The free registry code lookup runs the same call without a key.
Read the full guide · Get a free API key
Official sources: e-Business Register portal · RIK. Contains data from the Estonian e-Business Register (RIK), CC BY 4.0
| Name | What it is |
|---|---|
| e-Business Register (Äriregister) | The Estonian register of companies and other legal entities. Its open data is the source of the legal name, legal form, status, registered address, activity code and dates. |
| RIK | The Centre of Registers and Information Systems, which runs the register. Prometiam's Estonian records carry the attribution line "Contains data from the Estonian e-Business Register (RIK), CC BY 4.0". |
| Registry code | The eight-digit number of an entity, for example 10060701. The key you store for the register record. |
| KMKR number | The Estonian VAT number: EE plus nine digits, for an entity that is VAT-registered. A different number from the registry code. |
| Field | Notes |
|---|---|
| Legal name | The official name of the entity. |
| Legal form | The register's abbreviation with its Estonian name: for example OÜ (osaühing, private limited company), AS (aktsiaselts, public limited company), MTÜ (mittetulundusühing, non-profit association), UÜ (usaldusühing, limited partnership), TÜ (täisühing, general partnership), SA (sihtasutus, foundation) and FIL (a foreign company's branch). |
| Status | The register's state: registered (active), in liquidation (in_liquidation) or in bankruptcy (bankrupt). |
| Registered address | The registered address: street, postal code and city, with the county (maakond). |
| Activity code | The main activity as an EMTAK code, in the 2008 version (NACE Rev. 2) or the 2025 version (NACE Rev. 2.1). The register is migrating company by company, so activity_code_scheme says which one a company carries: EMTAK-2008 or EMTAK-2025. |
| Dates | The date of first entry in the register. |
| VAT number | The KMKR number, where the register publishes one. |