IRS EIN international tax line: phone vs. fax numbers

IRS EIN international tax line: fax or phone?

“IRS EIN international tax line” is a search phrase, not one universal number. For a Form SS-4 fax, choose the number from the applicant-location test and where the fax is sent. The separate phone route at 267-941-1099 is non-toll-free and is limited by the IRS to eligible principal businesses created or organized outside the United States and its territories.

That phone rule does not make a foreign-owned Delaware, Wyoming or other U.S.-organized LLC eligible. Use the applicable fax or mail route for a domestic-organized entity, even when its owner or operations are abroad.

Before you fax: choose the route in two steps

1. Check the applicant’s location. If the applicant has a legal residence, principal place of business, or principal office or agency in one of the 50 states or Washington, D.C., the IRS lists 855-641-6935.
2. If none of those U.S. connections applies, check where you send the fax. Use 855-215-1627 from within the United States or 304-707-9471 from outside it.

These are the routing conditions in the IRS “Apply by fax” instructions. They are separate from eligibility to apply by phone. For calling hours and that eligibility check, read the international EIN phone guide.

Can I call 855-641-6935 to ask about my EIN?

No—855-641-6935 is a fax number for EIN applications, not a voice helpline. The IRS says Fax-TIN numbers can only be used to apply for an EIN. Include a return fax number with the signed Form SS-4 so the IRS can fax the EIN back. If you already sent an application, see the SS-4 fax follow-up guide before sending it again.

Is 8556416935 the international EIN fax number?

8556416935 is the same number as 855-641-6935. The IRS lists it for the domestic Form SS-4 route, not as the default for an applicant with no legal residence, principal place of business, or principal office or agency in a state or Washington, D.C. An international-route application uses 855-215-1627 when the fax is sent from within the United States or 304-707-9471 when sent from outside it.

When 855-641-6935 is the domestic route

The IRS assigns 855-641-6935 to applicants with a legal residence, principal place of business, or principal office or agency in one of the 50 states or the District of Columbia. It is the domestic routing line.

A foreign owner who formed a U.S. LLC should evaluate the applicant’s actual legal residence or principal place of business under the IRS wording. Copying the domestic number from a generic business guide can route the application incorrectly.

What to include with the fax

1. The current official Form SS-4, completed, signed and dated.
2. A return fax number so the IRS can fax the EIN back.
3. The responsible party’s correct line 7a and 7b information.
4. The entity’s exact legal name and real mailing address.

When a return fax number is provided, the IRS says the Fax-TIN program generally returns an EIN response within four business days and is available 24 hours a day, seven days a week. Numbers may change without notice, so recheck the official instructions before sending.

The phone route is not an alternative for a U.S.-organized LLC

The non-toll-free line at 267-941-1099 operates Monday through Friday, 6:00 a.m. to 11:00 p.m. Eastern time, but the March 2026 IRS processing update limits telephone assignment to a principal business created or organized outside the United States and U.S. territories that also meets the published location conditions.

A foreign-owned Delaware, Wyoming or other state-organized LLC is a domestic case for this phone rule. It should use the applicable fax or mail method even when its owner and operations are abroad.

Mail alternative

International applicants can mail the signed Form SS-4 to:

The current IRS instructions say to mail the application at least four to five weeks before the EIN is needed.