City Name / Region National Dialing Format International Dialing Format
Central6330XXXX+65 6330XXXX
Central6331XXXX+65 6331XXXX
Central6332XXXX+65 6332XXXX
Central6333XXXX+65 6333XXXX
Central6334XXXX+65 6334XXXX
Central6335XXXX+65 6335XXXX
Central6336XXXX+65 6336XXXX
Central6337XXXX+65 6337XXXX
Central6338XXXX+65 6338XXXX
Central6339XXXX+65 6339XXXX
Central6431XXXX+65 6431XXXX
Central6432XXXX+65 6432XXXX
Central6433XXXX+65 6433XXXX
Central6434XXXX+65 6434XXXX
Central6837XXXX+65 6837XXXX
Central6883XXXX+65 6883XXXX