Khoan - Khao Sat Dia Chat Joint Stock Company Address: No 15 B, 49 Hoang Hoa Tham Lane, Phuong Ngoc Ha, Ngoc Ha Ward, Ba Dinh District, Ha Noi City Enterprise code: 0101896791 Phone: 0248471103 Representative: Nguyen Van Tuan Adress: No 15 B, 49 Hoang Hoa Tham Lane, Phuong Ngoc Ha, Ba Dinh District, Ha Noi City Ngoc Ha Ward, Ba Dinh District, Ha Noi CityFounding date: 24 - 3 - 2006