Ireland CRO company number check

Q: Can I check CRO company numbers from code or in bulk?

Yes. The same check is available over the REST API (GET /v1/ie/cro/{id}) and the MCP server, with the same key as every other country. See the API docs.

Check a Ireland CRO company number against the official registry and get the legal name, the status and a pass, review or fail verdict. Official registry

Example: 249885 (CRO company number). No account needed: 10 lookups a day per network, shared with the keyless API.

What this check tells you

Official registry

For CRO we first check the structure and check digit, then look the number up in Companies Registration Office Ireland (CRO open data, Company Records) (daily copy). The answer gives the legal name and the registry status, and a pass, review or fail verdict with reasons. Every answer carries source.data_as_of.

VAT: format and check digit only; that registry is not queried.

Businesses run by one person get their status only, never a name or address.

Ireland ID formats we check

ID type	Level	Check digit	API endpoint	Official lookup
CRO CRO company number (Companies Registration Office)	Official registry	None published (structure only)	`GET /v1/ie/cro/{id}`	CORE: Companies Registration Office search
VAT VAT number	Format only	Weighted sum mod 23 → check letter	`GET /v1/ie/vat/{id}`	European Commission VIES VAT number validation

From code

Same key and quota as every other country. A well-formed request costs one lookup; a source that does not answer returns HTTP 503 and is not counted.

curl "https://taxid.halpii.com/v1/ie/cro/249885" \
  -H "Authorization: Bearer $KEY"

Get a no-cost API key (100 lookups a day) or read the API docs.

Questions

Does a valid CRO company number mean the company exists?

Only the registry lookup tells you that. A number that passes the format check is then looked up in Companies Registration Office Ireland (CRO open data, Company Records); the answer says whether it was found and its status.

Where does the data come from?

From Companies Registration Office Ireland (CRO open data, Company Records) (daily copy). Each answer includes the source and the date of the data.

Can I check CRO company numbers from code or in bulk?

Yes. The same check is available over the REST API (GET /v1/ie/cro/{id}) and the MCP server, with the same key as every other country. See the API docs.

Is this service affiliated with the Ireland tax authority?

No. HALPII Tax ID is an independent service run by HALPII S.A.C. (Lima, Peru). Results are informational, not legal or tax advice.

Other countries in Europe

All countries and verification levels

Last updated 2026-11-14. An independent service run by HALPII S.A.C. (Lima, Peru), not affiliated with or endorsed by any Ireland authority.