Generate a test United States Employer Identification Number
A US EIN is a nine-digit business tax identifier formatted XX-XXXXXXX. These test values are synthetic — the US publishes no reserved EIN range — and are format-valid only.
Synthetic · not collision-guaranteed Validate a number →
66-0027357
Synthetic EIN (format-valid). The US publishes no reserved EIN test range.
Format specification
| Identifier | Employer Identification Number (EIN) |
|---|---|
| Country | 🇺🇸 United States |
| Format | XX-XXXXXXX |
| Length | 9 characters |
| Checksum | None |
| Example | 73-2863366 |
| Safe strategy | Synthetic |
| Data quality | Best-effort |
Validation regex
Matches the canonical value — strip separators and uppercase first: value.replace(/[^A-Za-z0-9]/g, '').toUpperCase()
^\d{9}$ References
Common questions
Will these pass my validation?
Yes — they are well-formed Employer Identification Number values (XX-XXXXXXX) and pass standard format checks.
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.