A company register is a register of organizations in the jurisdiction they operate under. A statistical business register has a different purpose than a company register.
While a commercial/trade register serves a purpose of protection, accountability and control, a statistical register plays a central part in a system of official economic statistics at a national statistics office.
A company registration number (CRN) is a unique eight character reference assigned to a company upon its incorporation. ... A company registration number is a unique number issued by Companies House when a limited company or Limited Liability Partnership (LLP) is incorporated.