United States Government--internal Revenue Service, Foster, Mammoth East Bank, WV 25067 Phone : (304) 595-6941 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--postal Service Mammoth East Bank, WV 25067 Phone : (304) 595-6941 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--postal Service, Bob White, Mammoth East Bank, WV 25067 Phone : (304) 595-6941 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--transportation Dept Of, Federal Aviation Administration, Mammoth East Bank, WV 25067 Phone : (304) 595-6941 Business Category Government Offices-Federal Transportation Services Local Passenger Transportation Government Offices & Public Schools United States Government--winfield Zip Code, Pond Gap, Mammoth East Bank, WV 25067 Phone : (304) 595-6941 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Mammoth State Route 81 Mammoth, WV 25132 Phone : (304) 595-6941 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--postal Service, Other Area Post Offices, Mammoth East Bank, WV 25067 Phone : (304) 595-6941 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools