SO31 postcode district

Postcodes and sectors

1,188 of the district's 1,711 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 50.87007, -1.30047, which locates the district, not a building.

Companies registered in SO31

Companies House lists 2,960 companies with a registered office in SO31; 260 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for SO31

• Hampshire
• South East
• Fareham
• Eastleigh
• Warsash
• Locks Heath
• Netley
• Hamble-le-Rice
• Bursledon
• Park Gate
• Sarisbury
• Lowford
• Swanwick
• Titchfield Common
• Old Netley
• Burridge
• Hedge End
• Butlocks Heath
• Hound
• Hook Park Estate
• Whiteley
• Hook

Roads filed under SO31

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Abbeyfields Close
• Abbey Hill
• Abbots Way
• Acorn Court
• Acorn Grove
• Addison Road
• Admirals Road
• Agincourt Drive
• Albacore Avenue
• Albert Close
• Allotment Road
• Ambledale
• Anglers Way
• Anson Drive
• Apollo Crescent
• Apollo Drive
• Applewood
• April Grove
• Aquila Way
• Arden Drive
• Argosy Close
• Arreton
• Ashby Mews
• Ash Close
• Ashley Close
• Ashley Court
• Ashwood
• Aspen Avenue
• Astral Gardens
• Avro Court
• Badgers Copse
• Badgers Run
• Barnbrook Road
• Barnes Close
• Barnes Lane
• Barnfield Way
• Baron Road
• Barton Drive
• Bastins Close
• Batchelor Green
• Battle Close
• Beach Lane
• Beacon Bottom
• Beacon Close
• Beacon Gardens
• Beacon Mount
• Beacon Way
• Beatty Close
• Beaulieu Road
• Beck Close
• Beech Close
• Beech Gardens
• Beechwood Close
• Bembridge
• Bentham Way
• Beverley Close
• Beverley Gardens
• Bevis Close
• Bilberry Close
• Birchdale Close

Check an address in SO31

Check an address in SO31

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SO31" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SO31

What does an SO31 postcode tell you?

That the address lies in the SO31 district of the SO (Southampton) postcode area, and the place OS Open Names most often lists first for its postcodes is Warsash. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,188 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest SO31

• PO155.0 km
• SO195.2 km
• SO305.4 km
• PO146.7 km
• SO457.1 km
• SO187.4 km
• SO148.0 km
• SO179.1 km
• PO179.2 km
• SO1510.1 km
• PO1610.1 km
• PO1310.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids