B
+28 Bougainville
+28
C
+26 Central Province
+26
E
+28 East New Britain
+28
+25 Eastern Highlands
+25
F
+28 Fly
+28
G
+29 Gulf
+29
M
+29 Madang
+29
+29 Morobe
+29
N
+26 National Capital District
+26
+27 New Ireland
+27
O
+26 Oro
+26
S
+27 Sandaun (West Sepik)
+27