Employer Identification Number

Summary

Nine-digit tax identifier the IRS assigns to U.S. organizations. Widely used to match organizations across federal award data.

The registry code is a three-part <schema>:<scope>:<prop>string that doubles as the map key in an identifier collection.

Pattern^\d{9}$

Example123456789

Presentation & validation

Lookup templatehttps://apps.irs.gov/app/eos/detailsPage?ein={id}