Grandstream Viet Nam LTD Address: No 56, Tuong Mai Street, Dong Tam Ward, Hai Ba Trung District, Ha Noi City Enterprise code: 0108447756 Phone: 02473002244 Representative: Luong Van Manh Dong Tam Ward, Hai Ba Trung District, Ha Noi CityFounding date: 27 - 9 - 2018