Embassy of Oman in Hanoi Address : 74 Trich Sai Street, Tay Ho District, Hanoi City, Vietnam. Phone : 024 3759 2700 | in Hanoi : 3759 2700 | outside Hanoi : 024  3759 2700 | outside Vietnam 0084 24 3759 2700 Fax: 024 3753 6666 Email: hanoi@mofa.