How to search the Argentina company registry (CUIT lookup).
The official, free tools to check one company in Argentina, what each returns, the CUIT format, and how to get every company at once.
Official lookup tools
Constancia de inscripción
- Run by
- ARCA (formerly AFIP)
- Search by
- CUIT
- What you get
- registration certificate: name, taxes registered for, activities, address
- Address
seti.afip.gob.ar
Links checked on 2026-11-10. The sites are in Spanish or Portuguese.
The registration certificate confirms the tax registration of one CUIT. Company formation records are kept by the provincial registries (the IGJ in Buenos Aires City); the Registro Nacional de Sociedades that the LatSouth Argentina file comes from consolidates them nationally.
The CUIT format
11 digits, written 30-12345678-9. Companies usually start with 30 or 33; individuals with 20, 23, 24 or 27.
Every company at once
The lookups answer "does this company exist, and is it active?" one company at a time. For market sizing, territory planning or a prospect list you need the whole register, filtered by industry and province: Argentina company data shows the counts by sector and province for free, with a 25-row sample, built from the Registro Nacional de Sociedades.
Questions
How do I look up a company in Argentina?
Start with Constancia de inscripción, run by ARCA (formerly AFIP): it is free and needs no account. The table lists what it returns.
What is the CUIT format?
11 digits, written 30-12345678-9. Companies usually start with 30 or 33; individuals with 20, 23, 24 or 27.
Can I get a list of all companies in Argentina?
Not from the lookup tools, which return one company at a time. LatSouth publishes counts by sector and province and sells the full file in English, built from the Registro Nacional de Sociedades.
Other countries
All of Argentina's companies, not one at a time.
Counts by sector and province, a free sample and the full file in English.