Not like CPF/CNPJ. Basic validation uses length and IRS-valid prefixes.
EIN Generator
Generate synthetic EINs using official valid IRS prefixes for company fixtures and tax-flow tests.
Synthetic EINs test prefix and format, not business existence.
An Employer Identification Number is a U.S. federal tax identifier. IRS publishes valid prefixes by campus or online issuance. This tool uses those prefixes to generate plausible test data without querying or creating a real entity.
Simulate businesses without using real identifiers.
- Generate an EIN and inspect the prefix, suffix and authority.
- Copy the hyphenated value for UI tests or the raw digits for payloads.
- Use only in fixtures; real EINs must be obtained or confirmed directly through IRS channels.
A valid prefix is not company validation
The first two digits of an EIN indicate an IRS campus or online issuance according to IRS lists. This helps reject impossible prefixes in tests.
Still, the prefix does not prove that an entity exists, is active or belongs to anyone.
- 9 digits.
- Official IRS prefixes.
- No real tax lookup.
Sources and references for this tool
These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
- IRS — Valid EINsInternal Revenue Service — Official list of valid EIN prefixes by campus/source.
- IRS — Employer Identification NumberInternal Revenue Service — Official context for EIN purpose, confirmation and use.
- IRS — Tax scamsInternal Revenue Service — Context for tax-fraud prevention and identifier misuse.