SO16 postcode district

Postcodes and sectors

1,542 of the district's 1,888 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 50.93675, -1.43352, which locates the district, not a building.

Companies registered in SO16

Companies House lists 2,807 companies with a registered office in SO16; 168 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 SO16

• South East
• Southampton
• City of Southampton
• Test Valley
• Hampshire
• Rownhams
• Nursling
• Chilworth
• Chilworth Old Village

Roads filed under SO16

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.

• Abbotsfield Close
• Abercrombie Gardens
• Abingdon Gardens
• Acorn Drive
• Adanac Drive
• Aldermoor Avenue
• Aldermoor Close
• Aldermoor Road
• Alderney Close
• Alder Road
• Alice Mews
• All Saints Close
• Anderby Road
• Anderdon Avenue
• Andes Road
• Andromeda Road
• Arcadia Close
• Ardnave Crescent
• Arliss Road
• Arlowe Drive
• Armada Close
• Arnheim Close
• Arnheim Road
• Ashmead Road
• Ashwood Gardens
• Aspen Holt
• Aster Road
• Atherfield Road
• Avington Court
• Babey Avenue
• Bakers Drove
• Ballard Close
• Balmoral Close
• Balmoral Way
• Bampton Close
• Bargain Close
• Barker Mill Close
• Barons Mead
• Barters Close
• Bassett Avenue
• Bassett Close
• Bassett Crescent East
• Bassett Crescent West
• Bassett Dale
• Bassett Gardens
• Bassett Green
• Bassett Green Close
• Bassett Green Drive
• Bassett Green Road
• Bassett Heath Avenue
• Bassett Meadow
• Bassett Mews
• Bassett Row
• Bassett Wood Drive
• Bassett Wood Road
• Beacon Close
• Bealing Close
• Beaulieu Close
• Beaumont Close
• Bedwell Close

Check an address in SO16

Check an address in SO16

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SO16" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SO16

What does an SO16 postcode tell you?

That the address lies in the SO16 district of the SO (Southampton) postcode area, and the place OS Open Names most often lists first for its postcodes is Southampton. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,542 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 SO16

• SO152.3 km
• SO173.1 km
• SO144.1 km
• SO524.6 km
• SO185.2 km
• SO405.6 km
• SO536.5 km
• SO196.7 km
• SO507.4 km
• SO518.2 km
• SO309.4 km
• SO4510.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids