SO40 postcode district

Postcodes and sectors

1,081 of the district's 1,455 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 50.91300, -1.50394, which locates the district, not a building.

Companies registered in SO40

Companies House lists 2,410 companies with a registered office in SO40; 183 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 SO40

• New Forest
• Hampshire
• South East
• Totton
• Marchwood
• Ashurst
• Lyndhurst
• Bartley
• Cadnam
• Woodlands
• Copythorne
• Netley Marsh
• Winsor
• Colbury
• Newbridge
• Hillstreet
• Ashurst Bridge

Roads filed under SO40

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.

• Aaron Court
• Abbotsfield
• Abbotsford
• Acorn Close
• Adams Wood Drive
• Admiralty Way
• Africa Drive
• Aikman Lane
• Aintree Road
• Alder Close
• Alder Hill Drive
• Alexander Close
• Alfred Close
• Allerton Close
• Alpine Close
• Alpine Road
• Amberley Court
• Amberwood Close
• Amey Gardens
• Andrew Close
• Appletree Close
• Applewood Place
• Arakan Crescent
• Archers Close
• Arters Lawn
• Arundel Road
• Ashby Crescent
• Ashby Road
• Ashdene Road
• Ash Grove
• Ash Road
• Ashurst Bridge Road
• Ashurst Close
• Ashwood Gardens
• Aspen Walk
• Austen Close
• Autumn Road
• Bagber Road
• Barberry Drive
• Barleycorn Walk
• Barneyhayes Lane
• Barnsfield Crescent
• Barrow Hill Road
• Bartley Avenue
• Bartley Road
• Bartram Road
• Bay Tree Gardens
• Bearslane Close
• Beaulieu Road
• Beaumont Road
• Beckley Walk
• Beechdale Close
• Beechdale Walk
• Beech Road
• Beechwood Road
• Belstone Road
• Benbow Gardens
• Bilberry Drive
• Birchglade
• Birchlands

Check an address in SO40

Check an address in SO40

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SO40" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SO40

What does an SO40 postcode tell you?

That the address lies in the SO40 district of the SO (Southampton) postcode area, and the place OS Open Names most often lists first for its postcodes is Totton. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,081 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 SO40

• SO155.6 km
• SO165.6 km
• SO436.7 km
• SO147.5 km
• SO178.0 km
• SO528.3 km
• SO519.2 km
• SO1810.0 km
• SO1910.5 km
• SO4510.6 km
• SO4211.1 km
• SO5311.7 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids