If you’ve ever asked, “How do I look up an EIN number?”, you’re not alone. An Employer Identification Number (EIN) is a unique 9-digit number assigned by the IRS to businesses for tax purposes. Whether you’re verifying a vendor, researching a nonprofit, or retrieving your own, here’s how to do it legally and efficiently.
Ways to Look Up an EIN Number
1. Check IRS Documents
If you’re trying to find your own EIN, look at:
- IRS confirmation letter (CP 575)
- Previous tax returns
- Business bank account application
- Official government filings (e.g., Form SS-4)
2. Use the IRS Exempt Organization Search
For nonprofits, the IRS provides a public lookup tool:
- Visit IRS Tax Exempt Search
3. Search State Business Registries
Many states list EINs or business IDs in their public databases:
- Visit your Secretary of State website
- Search by business name
4. Commercial EIN Lookup Services
Paid databases like:
- LexisNexis
- EINFinder
- Dun & Bradstreet
These tools aggregate EINs from public filings and credit bureaus.
5. Call the IRS (For Your EIN Only)
- Call the IRS Business & Specialty Tax Line: 800-829-4933
- Hours: Monday–Friday, 7 a.m.–7 p.m. (local time)
Note: The IRS won’t provide EINs for other businesses over the phone.
Is It Legal to Look Up an EIN?
Yes—EINs for businesses and nonprofits are often public, but they’re still sensitive information. Use only legal and reputable sources for verification.
Final Thought
How do I look up an EIN number? It depends whether you’re searching for your own or a third-party organization. Start with IRS records and official state databases for the most accurate and secure results.
