Nghia Hung Telecommunication Service Company Limited
TK 3, Phường Bắc Nghĩa, Dong Hoi City
Truong Phat Technology Equipment Company Limited
183 Đường Quang Trung, Phường Quảng Thọ, Ba Don Town
Linh Hang Telecommunication Service Company Limited
47 Trần Hưng Đạo, Phường Đồng Phú, Dong Hoi City
Khanh Hoa Telecommunication Service Company Limited
Số 1 Mẹ Suốt, Phường Hải Đình, Dong Hoi City