City Name / Region National Dialing Format International Dialing Format
Cao Bang0 (26) 2XXXXX+84 (26) 2XXXXX
Cao Bang0 (26) 4XXXXX+84 (26) 4XXXXX
Cao Bang0 (26) 5XXXXX+84 (26) 5XXXXX
Cao Bang0 (26) 6XXXXX+84 (26) 6XXXXX
Cao Bang0 (26) 7XXXXX+84 (26) 7XXXXX
Cao Bang0 (26) 8XXXXX+84 (26) 8XXXXX
Cao Bang0 (26) 9XXXXX+84 (26) 9XXXXX