A
+39 Attapeu
+39
B
+32 Bokeo Province
+32
+34 Bolikhamsai Province
+34
C
+31 Champasak Province
+31
H
+25 Houaphanh Province
+25
K
+26 Khammouane Province
+26
L
+28 Luang Namtha
+28
+34 Luang Phrabang
+34
O
+29 Oudomxay Province
+29
P
+25 Phongsaly
+25
S
+34 Sainyabuli
+34
+36 Salavan
+36
S
+30 Savannakhet
+30
+28 Sekong
+28
V
+23 Vientiane (airport)
+23
+39 Vientiane Province
+39
X
+28 Xiangkhouang Province
+28