What Is A Company Registration Number (CRN)?

Company Registration Number (CRN) A unique number assigned by Companies House when a UK company or applicable overseas company registration is created. The CRN is the official identifier used on statutory filings, company records, and public registers to distinguish one legal entity from another.

Assigned at incorporation or when an overseas company registers for a UK presence, the Company Registration Number (CRN) stays with the company for as long as the registration exists. It appears on incorporation documents, annual returns, accounts, and on formal correspondence from Companies House. Unlike trading names or branding, the CRN is a stable legal reference that links the company to its statutory record.

What The CRN Typically Covers

The CRN is a compact reference to a company’s statutory identity and does not replace other regulatory identifiers required for tax, customs, or employment. It provides a quick way to look up a company at Companies House and confirm registered name, incorporation date, registered office address, filing history and status.

• Scope: Identifies the registered legal entity on Companies House records.
• Persistence: Remains assigned to the same company number even if the company changes its trading name or address (unless dissolved and a new company is created).
• Public Record: Appears on the public register and is searchable online.

Why The CRN Matters

For professionals in commerce, logistics, and finance the CRN is a low‑friction way to verify a counterparty. Carriers, warehouse operators, banks, and trading partners often use the CRN to confirm the legal entity behind contracts, invoices or Bills of Lading. Regulators and auditors use it to reconcile filings and financial statements with the correct company record.

How CRNs Are Formatted And What They Mean

Companies House issues CRNs in a few predictable formats depending on the company type and jurisdiction. Typical formats include an eight-digit numeric sequence (e.g., 01234567) or a two-letter prefix followed by six digits (e.g., SC123456 for Scottish companies). Overseas companies that register in the UK will also receive a number.

• Numeric format: Common for standard UK limited companies (eight numbers).
• Prefixed format: Two-letter prefixes identify special registers (for example, SC for Scotland, NI for Northern Ireland in some contexts).
• Overseas registrations: Receive a UK CRN on registration which links the overseas entity to the UK register.

How To Find And Verify A CRN

Companies House provides online search tools and APIs that allow verification of a company name, CRN and filing history. Entering a CRN in the Companies House service returns the company record; matching records on both name and number reduces the risk of mistaken identity for contracts, shipment instructions, or compliance checks.

• Online search: Use the Companies House public search to look up company data by number or name.
• API access: Developers and systems can integrate with the Companies House API for automated verification and reconciliation.
• Document checks: Confirm the CRN shown on letters of authority, invoices, or corporate documents against the Companies House entry.

Who Uses The CRN And When

Auditors, legal teams, banks, carriers, customs brokers and warehouse operators use CRNs routinely. Typical touchpoints include onboarding suppliers or customers, preparing shipping paperwork, completing due diligence checks, and filing statutory accounts or tax returns where a precise company identity is required.

• Onboarding: Collect the CRN when setting up a new supplier or customer record in your ERP or WMS.
• Contracts: Include the CRN on contracts and purchase orders to avoid ambiguity about the legal counterparty.
• Regulatory submissions: Use the CRN to reference a company in government or industry filings.

Practical Example

A logistics manager receiving a new inbound from a UK supplier asks for the supplier’s CRN during onboarding. The manager uses the CRN in the company-information search to verify the supplier’s registered address and confirm the business is active. They then record the CRN in the warehouse management system so that carrier paperwork and invoices reference the verified legal entity — reducing risk during customs clearance and contract execution.

Tips For Working With CRNs

• Record accurately: Store the CRN in your master data and printed documents exactly as shown on Companies House.
• Automate verification: Use the Companies House API to validate CRNs during onboarding and before high‑value transactions.
• Watch for similar names: Always match both name and CRN to avoid confusion with similarly named companies.

In short, the Company Registration Number (CRN) is a concise, government‑issued identifier that ties a UK company or registered overseas company to its statutory record. For logistics, finance and compliance teams the CRN is a reliable key for verification, recordkeeping and regulatory filing.