🇬🇧 B2B Compliance Engine
UK Company Number Validator
Verify the 8-character format for businesses registered with Companies House.
CRN Format Guide
A standard UK CRN is always 8 characters. England & Wales companies usually use 8 digits (e.g. 01234567). Scottish companies start with 'SC', Northern Ireland with 'NI', and Limited Liability Partnerships with 'OC'. This tool ensures the format is structurally correct for HMRC and payroll filings.