It is important to form the LLC first, then apply for the EIN, in that order. If you used the EIN for any purpose without a valid LLC, then you may get in trouble somehow down the road.
Call the IRS. The best number to call is (+1) 800-829-4933. When you hear the various menu options, select option 1 for English or 2 for Spanish, then option 1 for EIN inquiries, and then option 3. You can call during IRS Business hours: a.m. - p.m. Eastern Standard Time (GMT-5).
An LLC applies for an EIN by filing Form SS-4, Application for Employer Identification Number. See Form SS-4 for information on applying for an EIN. A single-member LLC that is a disregarded entity that does not have employees and does not have an excise tax liability does not need an EIN.
How to verify an EIN number for a business Check the SEC's EDGAR system. Search a state's Secretary of State business directory. Go directly to the IRS for nonprofit organizations. Request a report from a major credit bureau. Ask the business's accounting department, or search other public places. Leverage Middesk.