City Name / Region National Dialing Format International Dialing Format
Lang Son0 (25) 2XXXXX+84 (25) 2XXXXX
Lang Son0 (25) 4XXXXX+84 (25) 4XXXXX
Lang Son0 (25) 5XXXXX+84 (25) 5XXXXX
Lang Son0 (25) 6XXXXX+84 (25) 6XXXXX
Lang Son0 (25) 7XXXXX+84 (25) 7XXXXX
Lang Son0 (25) 8XXXXX+84 (25) 8XXXXX
Lang Son0 (25) 9XXXXX+84 (25) 9XXXXX