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Contact the Office of Federal Acknowledgment

Mailing Address

Office of Federal Acknowledgment MS-4071-MIB1849 C Street, N.W. Washington, D.C. 20240

Telephone: (202) 513-7650Telefax: (202) 219-3008

Hours of operation: Monday through Friday, 8:00 a.m. to 5:00 p.m., Eastern Time; holidays excluded.

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An official website of the U.S. Department of the Interior

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