United States fax directory
Select the exact form and location rule that applies to you. Each detail page links to the official IRS source and opens the fax sender with that number prefilled.
Checked 2026-07-23
Each entry links to the IRS page or PDF used for verification.
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Government routing rules and fax numbers can change without notice.
Form SS-4 - IRS EIN Operation - U.S. applicants
Use this Fax-TIN number only when the entity has a legal residence, principal place of business, office, or agency in one of the 50 states or the District of Columbia.
Form SS-4 - IRS EIN International Operation - sender within the U.S.
Use this number for an applicant with no legal residence, principal place of business, office, or agency in any U.S. state or the District of Columbia, when sending from within the United States.
Form SS-4 - IRS EIN International Operation - sender outside the U.S.
Use this number for an applicant with no legal residence, principal place of business, office, or agency in any U.S. state or the District of Columbia, when sending from outside the United States.
Form 2553 - IRS Service Center - Kansas City
For entities in Connecticut, Delaware, District of Columbia, Georgia, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West Virginia, or Wisconsin.
Form 2553 - IRS Service Center - Ogden
For entities in Alabama, Alaska, Arizona, Arkansas, California, Colorado, Florida, Hawaii, Idaho, Iowa, Kansas, Louisiana, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, or Wyoming.
Forms 2848 and 8821 - Centralized Authorization File Unit - Memphis
For taxpayer addresses in Alabama, Arkansas, Connecticut, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, or West Virginia.
Forms 2848 and 8821 - Centralized Authorization File Unit - Ogden
For taxpayer addresses in Alaska, Arizona, California, Colorado, Hawaii, Idaho, Iowa, Kansas, Minnesota, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wisconsin, or Wyoming.
Forms 2848 and 8821 - International CAF Team - sender within the U.S.
For APO and FPO addresses, American Samoa, the Commonwealth of the Northern Mariana Islands, Guam, U.S. Virgin Islands, Puerto Rico, a foreign country, or another address outside the United States, when the fax is sent from within the United States.
Forms 2848 and 8821 - International CAF Team - sender outside the U.S.
For APO and FPO addresses, American Samoa, the Commonwealth of the Northern Mariana Islands, Guam, U.S. Virgin Islands, Puerto Rico, a foreign country, or another address outside the United States, when the fax is sent from outside the United States.
Pro forma Form 1120 with Form 5472 - IRS Ogden PIN Unit
This dedicated number is for the foreign-owned U.S. disregarded entity filing described in the Form 5472 instructions: a pro forma Form 1120 with Form 5472 attached.
A delivered fax status means the receiving fax endpoint completed the transmission. It does not prove that the IRS accepted the document, assigned an EIN, recorded an authorization, or approved an election. Follow the acknowledgment and follow-up instructions for the specific form.
