UK area code
023 — Southampton
023 is the UK geographic dialling code for Southampton, and also covers Portsmouth, Eastleigh, Fareham, Gosport, Havant. It is a landline code: UK mobile numbers begin 07 and have no area code.
How to dial 023
- From the UK
- 023 123456
- From abroad
- +44 23 123456
- Within the area
- 123456 — the local part alone usually works
Places on 023
6 places share this code.
Postcode districts in the 023 area
Approximate. Postcode boundaries and telephone-area boundaries are drawn by different bodies and don't line up exactly — this is reliable at town level and wrong at the margins where a district crosses a boundary.
Neighbouring codes
Codes that share a postcode area with 023, so they cover adjoining ground.
Calling Southampton from a 023 number
People answer a local number far more often than an unknown one. Local presence gives a floor a number in the area it's ringing, so a call to Southampton shows a 023 number rather than one from wherever the business happens to sit. It's an add-on from £49 a month; whether a given code is available depends on what carriers hold at the time, so it's worth asking rather than assuming.
023 questions
Where is the 023 area code?
023 is the UK geographic dialling code for Southampton, covering Portsmouth, Eastleigh, Fareham, Gosport, Havant. It is a landline code — UK mobile numbers start 07 and have no area code.
How do I dial 023 from within the UK?
Dial the full number including the leading zero: 023 followed by the local number. From a landline inside the 023 area you can usually dial the local part on its own, though including the code always works.
How do I dial a 023 number from abroad?
Dial your exit code, then 44, then 23 without the leading zero, then the local number. So 023 123456 becomes +44 23 123456.