The country code and area code of Vientiane, Laos is 856, (0)21.
The area of Vientiane Province is 15,927 square kilometers.
laos
The area of Vientiane Prefecture is 3,920 square kilometers.
The country code and area code of Thakhek, Laos is 856, (0)51.
The country code and area code of Attapeu, Laos is 856, (0)36.
The country code and area code of Bokeo, Laos is 856, (0)84.
The country code and area code of Huaphanh, Laos is 856, (0)64.
The country code and area code of Loungprabang, Laos is 856, (0)71.
The country code and area code of Oudomsay, Laos is 856, (0)81.
The country code and area code of Pakse, Laos is 856, (0)31.
The country code and area code of Phongsaly, Laos is 856, (0)88.