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Mailing Address: Eastern Oklahoma Regional Office Bureau of Indian Affairs P.O. Box 8002 Muskogee, OK 74402-8002 Physical Address: Eastern Oklahoma Regional Office Bureau of Indian Affairs 3100 W. Peak Boulevard Muskogee, OK 74402 Telephone: (918) 781-4600 Telefax: (918) 781-4604 Hours: 8:00 a.m. - 5:00 p.m.