Company Registration Number Generator
BusinessGenerate valid-format company registration numbers for UK, US, and other jurisdictions. Perfect for testing business verification systems and corporate databases.
Settings
Format: UK Companies House
8-digit company number assigned by Companies House
Example: 12345678
Common Formats
What is This Tool?
A company registration number generator creates realistic mock company registration numbers for various jurisdictions. Generated numbers follow the correct format for Companies House (UK), state corporation filings (US), and other national business registries around the world.
Company registration numbers are assigned by government agencies when businesses incorporate. Formats vary: UK Companies House uses 8-digit numbers with optional letter prefixes, US states use varying formats, and other countries have unique systems. This tool generates properly formatted numbers for testing corporate data systems.
Common Use Cases
KYB Verification Testing
Test Know Your Business verification workflows that look up and validate company registration numbers against government registries.
Corporate Registry Integration
Validate integrations with Companies House API, OpenCorporates, and other business registry services using format-correct test data.
Legal Tech Software
Test corporate filing systems, company formation platforms, and legal document generation that require registration numbers.
Compliance & Due Diligence
Populate compliance databases with test corporate entities for sanctions screening, PEP checks, and beneficial ownership workflows.
Frequently Asked Questions
Are generated numbers registered companies?
No. Numbers follow correct formatting for the selected jurisdiction but are not registered with any government authority.
Which jurisdictions are supported?
The generator supports UK (Companies House), US (state filings), and several other major jurisdictions with distinct registration number formats.
Do numbers include check digits?
Where the registration format includes check digits or validation rules, generated numbers follow those rules for format validity.