The cod unic de înregistrare, also called CIF: the company’s fiscal identification number, 2 to 10 digits without leading zeros, such as 5022670 for Banca Transilvania. A prefix RO, CUI or CIF is accepted and dropped. The last digit is a check digit (weights 7, 5, 3, 2, 1, 7, 5, 3, 2) but a few genuine numbers fail it, so a mismatch is a warning and not an error. A 13-digit number is a personal identification number (CNP), never a company, and is refused.

Is the Romanian VAT number the CUI?

It is built on it: RO plus the CUI, for example RO5022670. The record gives it by rule, so the format is right but the VAT registration is not confirmed; check it with GET /vat/ followed by the number, which asks VIES. Search it with vat= and country=RO.

What is the registration number (J number)?

The number the trade register itself assigns, such as J1993004155124 (J, the year of registration, the county code and a sequence) or, for older entries, J40/1477/2012. The EUID (ROONRC. and the J number) is the European identifier built on it. Both are in the record beside the CUI.

Which activity classification do Romanian records use?

CAEN, Romania’s version of NACE, in the revision the company holds (Rev. 2 or Rev. 3, and older codes for some). The codes are in caen_codes; the NACE code is given when a company has exactly one CAEN code, and the scheme is named in activity_code_scheme.

Does Prometiam serve Romanian officers, company events or insolvency notices?

Company events yes; officers and insolvency notices no. Romanian records are company-level. There are no officers, no registry-compliance signal and no share capital. Register-change events (name, status, legal form and registered address, dated when the change first appears in the register data, none before the first load in October 2026) and monitoring are available. Romania is not one of the twelve insolvency markets: insolvency, reorganisation and bankruptcy show in the company status.

Which Romanian entities are included?

Companies and the other legal persons of the trade register: SRL, SA, SNC, SCS, SCA, regii autonome (RA), economic interest groupings, cooperatives and the others the register lists. Natural persons, authorised natural persons and sole traders (PF, PFA, II, IF, AF) are never served, and neither are branches, so a search for one returns nothing even though it exists.

How often is the Romanian data updated?

Monthly: the register publishes its open data once a month, so a change appears in the next monthly update.

What is the ONRC (Romania’s National Trade Register Office)?

The Oficiul Național al Registrului Comerțului (ONRC) is the National Trade Register Office of Romania, which keeps the trade register of companies and other registered entities. Every company has a CUI (cod unic de înregistrare, also CIF) of 2 to 10 digits, for example 5022670 for Banca Transilvania. The Romanian VAT number is RO followed by the CUI.

The CUI

2 to 10 digits without leading zeros. The last digit is a check digit with the weights 7, 5, 3, 2, 1, 7, 5, 3, 2, but a few genuine numbers fail it, so a mismatch is a warning, not an error. A 13-digit number is a personal identification number (CNP), never a company.

What Prometiam serves for Romania

Company records from the National Trade Register Office (ONRC): legal name, legal form, status (including dissolution, liquidation, insolvency, reorganisation, bankruptcy and deregistration), registered address with the county, CAEN activity codes, the J registration number and EUID, and dates; the VAT number is built from the CUI by rule (RO plus the CUI) and the registration is not confirmed; with register-change events and monitoring, but no officers, no registry-compliance signal, no share capital and no insolvency notices. Natural persons and sole traders (PF, PFA, II, IF, AF) are never served. Updated monthly. Contains data from the National Trade Register Office (ONRC), CC BY 4.0.

Querying Romanian companies

GET /companies/search?company_number=5022670&country=RO returns the record. The free CUI lookup runs the same call without a key.

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Official sources: ONRC · data.gov.ro. Contains data from the National Trade Register Office (ONRC), CC BY 4.0

Who supplies what

Name	What it is
ONRC	The National Trade Register Office. The source of the legal name, legal form, status, registered address, CAEN codes, registration number and dates.
data.gov.ro	The national open data portal, where the ONRC publishes its open data under the CC BY 4.0 licence.
CUI / CIF	The fiscal identification number, `5022670`. The key you store for the register record.
J number and EUID	The number the trade register assigns itself (`J1993004155124`) and the European identifier built on it (`ROONRC.J1993004155124`).
Credit line	Prometiam’s Romanian records carry "Contains data from the National Trade Register Office (ONRC), CC BY 4.0".

What a Romanian record holds

Field	Notes
Legal name	The name as registered.
Legal form	The register’s form with its label: SRL (societate cu răspundere limitată), SA (societate pe acțiuni), SNC, SCS, SCA, RA (regie autonomă), GIE, cooperatives and the others the register lists.
Status	In operation, registered but not yet active, activity suspended, dissolution, liquidation, insolvency, judicial reorganisation or preventive concordat, bankruptcy (served as in liquidation and insolvent), struck off, or merged. The register’s own status codes are kept beside the standard status.
Registered address	Street and number, locality and postal code where the register gives it, with the county (județ) in `region` and its code.
Registration number and EUID	The J number (`J1993004155124`, or `J40/1477/2012` for older entries) and the EUID, in `registry_details`.
Activity codes	CAEN codes in `caen_codes`, in Rev. 2 or Rev. 3 as the company holds them; the NACE code and its scheme when a company has exactly one CAEN code.
Dates	The date of registration.
VAT number	`RO` plus the CUI, built by rule (`vat_number_source` is `rule`); the registration is not confirmed.

Frequently asked questions

What is the ONRC?: The Oficiul Național al Registrului Comerțului, the National Trade Register Office of Romania, which keeps the trade register of companies and other registered entities. Its open data is the source of the Romanian company records Prometiam serves.
What is a CUI?: The cod unic de înregistrare, also called CIF: the company’s fiscal identification number, 2 to 10 digits without leading zeros, such as 5022670 for Banca Transilvania. A prefix RO, CUI or CIF is accepted and dropped. The last digit is a check digit (weights 7, 5, 3, 2, 1, 7, 5, 3, 2) but a few genuine numbers fail it, so a mismatch is a warning and not an error. A 13-digit number is a personal identification number (CNP), never a company, and is refused.
Is the Romanian VAT number the CUI?: It is built on it: RO plus the CUI, for example RO5022670. The record gives it by rule, so the format is right but the VAT registration is not confirmed; check it with GET /vat/ followed by the number, which asks VIES. Search it with vat= and country=RO.
What is the registration number (J number)?: The number the trade register itself assigns, such as J1993004155124 (J, the year of registration, the county code and a sequence) or, for older entries, J40/1477/2012. The EUID (ROONRC. and the J number) is the European identifier built on it. Both are in the record beside the CUI.
Which activity classification do Romanian records use?: CAEN, Romania’s version of NACE, in the revision the company holds (Rev. 2 or Rev. 3, and older codes for some). The codes are in caen_codes; the NACE code is given when a company has exactly one CAEN code, and the scheme is named in activity_code_scheme.
Does Prometiam serve Romanian officers, company events or insolvency notices?: Company events yes; officers and insolvency notices no. Romanian records are company-level. There are no officers, no registry-compliance signal and no share capital. Register-change events (name, status, legal form and registered address, dated when the change first appears in the register data, none before the first load in October 2026) and monitoring are available. Romania is not one of the twelve insolvency markets: insolvency, reorganisation and bankruptcy show in the company status.
Which Romanian entities are included?: Companies and the other legal persons of the trade register: SRL, SA, SNC, SCS, SCA, regii autonome (RA), economic interest groupings, cooperatives and the others the register lists. Natural persons, authorised natural persons and sole traders (PF, PFA, II, IF, AF) are never served, and neither are branches, so a search for one returns nothing even though it exists.
How often is the Romanian data updated?: Monthly: the register publishes its open data once a month, so a change appears in the next monthly update.