Embassy of United States of America in Hanoi Address: 07 Lang Ha Street, Ba Dinh District, Hanoi City, Vietnam. Phone : (024) 3850 5000 | in Hanoi : 3850 5000 | outside Hanoi : 024 3850 5000 | outside  Vietnam : 0084 24 3850 5000 Fax : (024) 3850-5010 Email : hanoiac@state.