01
Search
Enter the company's full or partial legal name in the search box.
Free Irish CRO number lookup
How to find a company registration number in Ireland
Search an Irish company by its legal name to find its CRO registration number, or enter a CRO number to check which company it belongs to.
Free company number check for Ireland. No account is required to search.
Step by step
Find a CRO number using the company name
02
Choose the match
Compare the county, registered address and company status to select the correct entity.
03
Read the number
Open the profile. The CRO number appears beside the company name and under Company Details.
Visual walkthrough
Where the company registration number appears
Screenshots captured 21 July 2026. Company records and the interface can change; check the live profile for current information.
Other places to check
Where to find a CRO number
If you cannot search online, the number may also appear on the company's certificate of incorporation, CRO filings, website, invoices, order forms or business correspondence. Always check that the legal name and address match the company you intend to research.
Businesses.ie is an independent interface to public register data. UseCRO COREwhen you need the official register or an official company document.
Do not mix these identifiers
CRO number vs tax number vs VAT number
These numbers serve different systems. Finding a CRO number does not confirm the company's tax compliance or VAT registration.
| Identifier | Managed by | Primary purpose | Public lookup? |
|---|---|---|---|
| CRO / company registration number | Companies Registration Office | Identifies an incorporated company on the public register | Yes, through CRO CORE and company-search services |
| Tax reference number | Revenue | Identifies the business for its registered tax obligations | Not a general public company-register lookup |
| VAT number | Revenue | Identifies a business registered for Value Added Tax | Validity can be checked through official VAT verification services |
Common questions
Company registration number FAQs
What is a company registration number in Ireland?
For an Irish incorporated company, the company registration number is its CRO number: the unique numeric identifier assigned by the Companies Registration Office when the company is incorporated.
How do I find a company registration number in Ireland?
Search the company's legal name on Businesses.ie and open the matching profile. The CRO number appears beside the company name and again in the Company Details section.
Where can I find a CRO number?
Check the company profile on Businesses.ie or CRO CORE, the certificate of incorporation, CRO filings, and the company's website, invoices or business correspondence where it is displayed.
Is a CRO number the same as a tax reference number?
No. The CRO issues the company registration number for the public company register. Revenue manages tax reference numbers for the company's tax affairs.
Is a CRO number the same as a VAT number?
No. A VAT number relates to VAT registration with Revenue. Not every company is VAT registered, and a company's CRO number should not be used as proof of VAT registration.
Does a CRO number change if the company changes its name?
No. The company keeps its registration number when its legal name, address, directors or status changes. This makes the number a more reliable identifier than the company name alone.
Why can I not find a company using the number I have?
Check for mistyped digits and confirm that the number belongs to an incorporated company rather than a registered business name, charity, tax account or VAT registration. Search by legal name if the number still produces no match.
Check an Irish company now
Search is free. Open the company profile to confirm its CRO number, legal name, status and registered address.
Search Irish companiesReviewed by the Businesses.ie Editorial Team · 21 July 2026