A company registration number (CRN) is a unique combination of numbers, at times of numbers and letters. It is used to identify a company and verify its legal existence as an incorporated entity. A unique Company Registration Number is assigned as the company is registered on a certain register. The issuing entity differs from country to country. In Germany the public register and issuing entity is the Handelsregister. In the UK it is the Companies House.
​

The CRN can be found on the Certificate of Incorporation, on all official documentation received from the issuing entity or on the excerpts of the register. A company registration number is also referred to as ‘company number’.