The 023 area code is a 2 digit geographical dialling code (excluding the zero) used in telecommunications for the Southampton, Portsmouth area.
The local telephone numbers within the 023 are 8 digits long.
The correct format in which to write a telephone number from the Southampton, Portsmouth area code is (023) [x][x][x][x] [x][x][x][x].
The Southampton, Portsmouth 023 dialling code intersects the counties of Hampshire and West Sussex in the South East Region of the UK.
You will need to use a dialling code if you are calling from a mobile phone or a landline outside of the 023 Southampton, Portsmouth dialling code area. If you are calling a local number within the same area code with a landline telephone you do not need to use the 023 dialling code.
If you are calling from outside of the UK. You will need to add the code for dialling internationally. This varies country to country, followed by the UK country code (44) followed by the area code without the initial zero (23).
|Region||International Prefix||Country Code||Area Code|
|United States and Canada||011||44||23|
Before the 16th April 1995 known as PhONEday which changed telephone area codes by inserting a 1 at the beginning. The area code was 0703 and 0705.
The area code for Portsmouth (01705) and Southampton (01703) merged to become 023 after the Big Number Change on the 22nd April 2000.
The shaded area on the map represent the estimated extent of the 023 Southampton, Portsmouth phone area code.
The blue icons on the map represent the locations of telephone exchanges serving the 023 area. Click on an icon for more details
|PORTSMOUTH TRUNK EXCH (SDCSHM)|
|HAVANT ATE (SDHVNT)|
|PORTSMOUTH CENTRAL ATE (SDPCNTC)|
|WATERLOOVILLE ATE (SDWTRLV)|
|EASTLEIGH ATE (STEASTL)|
|HAMPTON ATE (STHMPTN)|
|ROWNHAMS ATE (STRWNMS)|
|SOUTHAMPTON OGLE ROAD (STSOTON)|
|TOTTON ATE (STTOTTN)|
|WOOLSTON ATE (STWLSTN)|
|HORNDEAN ATE (SDHRNDN)|
|HAYLING ISLAND ATE (SDHYLNG)|
|PORTSMOUTH NORTH END ATE (SDPNRTH)|
|BURSLEDON ATE (STBURSN)|
|CHANDLERS FORD ATE (STCFORD)|
|MOORHILL ATE (STMRHLL)|
|SHIRLEY ATE (STSHRLY)|
|COMPTON UAX (WEST MARDEN) (SDCMPTN)|
|GOSPORT ATE (SDGSPRT)|
|HAMBLEDON ATE (SDHMBLD)|
|LEE-ON-SOLENT ATE (SDLSLNT)|
|ROWLANDS CASTLE ATE (SDRWLND)|
|ASHURST ATE (STASHST)|
|BASSETT ATE (STBSETT)|
|CADNAM NEW ATE (STCADNM)|
|FAIROAK ATE (STFAIRO)|
|FAWLEY ATE (STFAWLY)|
|HAMBLE ATE (STHAMBL)|
|HYTHE ATE (STHYTHE)|
|LYNDHURST ATE (STLYNST)|