City Name / Region National Dialing Format International Dialing Format
Hougang6213XXXX+65 6213XXXX
Hougang6384XXXX+65 6384XXXX
Hougang6385XXXX+65 6385XXXX
Hougang6386XXXX+65 6386XXXX
Hougang6387XXXX+65 6387XXXX
Hougang6388XXXX+65 6388XXXX
Hougang6389XXXX+65 6389XXXX
Hougang6480XXXX+65 6480XXXX
Hougang6482XXXX+65 6482XXXX
Hougang6489XXXX+65 6489XXXX
Hougang6830XXXX+65 6830XXXX
Hougang6831XXXX+65 6831XXXX
Hougang6870XXXX+65 6870XXXX