CUIT generator (Argentina)
An Argentine CUIT/CUIL is eleven digits — a type prefix, the DNI, and a MOD-11 check digit, formatted 00-00000000-0. These test values are synthetic but checksum-valid.
Synthetic · not collision-guaranteed Validate a number →
30-05992674-4
Synthetic CUIT/CUIL with a valid check digit. Not a real issued number.
Format specification
| Identifier | Clave Única de Identificación Tributaria (CUIT / CUIL) |
|---|---|
| Country | 🇦🇷 Argentina |
| Format | 00-00000000-0 |
| Length | 11 characters |
| Checksum | MOD 11 |
| Example | 30-29136335-7 |
| Safe strategy | Synthetic |
| Data quality | Verified against sources |
Clave Única de Identificación Tributaria: what each part means
| 00 | Type prefix: 20 (men), 27 (women) and 30 (companies) are the main ones; 23, 24, 33 and 34 are overflow prefixes used when a number would otherwise collide. |
|---|---|
| 00000000 | For a person this is their eight-digit DNI (national identity document number); for a company, a sequential number. |
| 0 | MOD-11 check digit (weights 5,4,3,2,7,6,5,4,3,2). Combinations that would need a control value of 10 are never issued. |
Validation regex
Matches the canonical value — strip separators and uppercase first: value.replace(/[^A-Za-z0-9]/g, '').toUpperCase()
^\d{11}$ References
Common questions
Will these pass my validation?
Yes — they are well-formed Clave Única de Identificación Tributaria values (00-00000000-0) and pass standard format checks, including the MOD 11 checksum.
Could one belong to a real person?
These are synthetic values. They are format-valid but not drawn from a guaranteed reserved range, so use them only for testing.
Can I generate many at once?
Increase the count, or use the free API and CSV/JSON export for large datasets.
For software testing only. These numbers are synthetic and must never be used
for real-world identification, applications, or to impersonate anyone.