You will obtain an EIN from the IRS.gov. There are several elements that you must know before you fill out an SS4 application and fax it to the IRS for your U.S. LLC. If you obtain an EIN for a foreign entity you may call the IRS and answer questions over the phone, then fax your SS4 application at the end of the call. Caution: you must fill out the SS4 form properly especially section 9 a where you tell the IRS the type of entity and which tax return you will be filling. Get this incorrect and you are on a long road of dealing with the IRS to get this corrected after filing tax returns. Obtaining an EIN gets more complex when the US LLC is owned by a foreign entity. Expert support is recommended.