brregno

Brregno is an informal term used to refer to the organization number assigned to registered entities in Norway by Brønnøysundregistrene (BRREG). Officially, the identifier is known as the organisasjonsnummer. The number uniquely identifies a legal entity—such as a company, foundation, or association—in Norwegian public registries and in many private-sector processes.

The organisasjonsnummer serves as a core identifier in interactions with government agencies, banks, suppliers, and tax authorities. It is used for registrations, reporting requirements, invoicing, and legal communication. The number links to records in registries such as the Enhetsregisteret and the Foretaksregisteret, and it helps ensure the traceability of an entity across official datasets and public records.

Format-wise, the brregno/organisasjonsnummer is a nine-digit numeric identifier, issued to eligible entities after registration. The number itself contains no separators, and it remains constant for the life of the entity, even if the entity changes name or address.

Access to information about an organisasjonsnummer is provided by Brønnøysundregistrene through public search tools, where users can verify a company’s name, status, and registered details. While brregno is commonly used in informal speech, official references prefer the term organisasjonsnummer. The concept plays a central role in Norwegian administrative and commercial activities.