023 area code: Southampton and Portsmouth
Updated: 17/09/2026
023 is the area code for Southampton and Portsmouth. Landline numbers with this code are written as 023 XXXX XXXX.
023 area code – Southampton and Portsmouth
| Area code | 023 |
|---|---|
| Area | Southampton and Portsmouth |
| Region | South East England |
| Number format | 023 XXXX XXXX |
| International format | +44 23 XXXX XXXX |
An area code does not prove where the caller is. Geographic numbers are also issued to internet phone (VoIP) services, so a business or call centre anywhere can use a local-looking number, and scammers often fake local area codes.
Missed call from a number starting with 023 – what to do
- Check the full number in the search below to see reviews and reports from other people.
- Never read out one-time passcodes, card details or online banking passwords over the phone. Your bank and the police will never ask you to move money to a "safe account".
- Forward scam texts to 7726 for free and report fraud to Report Fraud, which replaced Action Fraud (in Scotland, to Police Scotland on 101).
Other area codes in South East England
- 0118 – Reading
- 01227 – Canterbury
- 01233 – Ashford (Kent)
- 01235 – Abingdon
- 01243 – Chichester
- 01252 – Aldershot and Farnborough
- 01256 – Basingstoke
- 01264 – Andover
- 01273 – Brighton
- 01276 – Camberley
- 01280 – Buckingham
- 01293 – Crawley
- 01295 – Banbury
- 01296 – Aylesbury
- 01303 – Folkestone
- 01304 – Dover
- 01306 – Dorking
- 01322 – Dartford
- 01323 – Eastbourne
- 01329 – Fareham
- 01342 – East Grinstead
- 01344 – Bracknell
- 01372 – Esher and Epsom
- 01403 – Horsham
- 01420 – Alton
- 01424 – Hastings
- 01425 – Ringwood
- 01428 – Haslemere
- 01444 – Haywards Heath
- 01474 – Gravesend
- 01483 – Guildford
- 01488 – Hungerford
- 01491 – Henley-on-Thames
- 01494 – High Wycombe
- 01580 – Cranbrook
- 01590 – Lymington
- 01608 – Chipping Norton
- 01622 – Maidstone
- 01628 – Maidenhead
- 01634 – Medway (Chatham, Gillingham, Rochester)
- 01635 – Newbury
- 01730 – Petersfield
- 01732 – Sevenoaks
- 01737 – Redhill
- 01753 – Slough
- 01784 – Staines-upon-Thames
- 01794 – Romsey
- 01795 – Sittingbourne
- 01797 – Rye
- 01798 – Pulborough
- 01825 – Uckfield
- 01843 – Thanet (Margate, Ramsgate, Broadstairs)
- 01844 – Thame
- 01865 – Oxford
- 01869 – Bicester
- 01883 – Caterham
- 01892 – Tunbridge Wells
- 01903 – Worthing
- 01908 – Milton Keynes
- 01932 – Weybridge
- 01959 – Westerham
- 01962 – Winchester
- 01983 – Isle of Wight
- 01993 – Witney
All dialling codes