SA3 postcode district

Postcodes and sectors

727 of the district's 979 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 51.58106, -4.05250, which locates the district, not a building.

Companies registered in SA3

Companies House lists 1,444 companies with a registered office in SA3; 80 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 SA3

• Abertawe
• Swansea
• Wales
• Southgate
• Murton
• Llandeilo Ferwallt
• Bishopston
• Pyle
• Llangennith
• Reynoldston
• Llanrhidian
• Port-Eynon
• Manselfield
• Kittle
• Scurlage
• Llanmadoc
• Horton
• Rhossili
• Penmaen
• Caswell
• Little Reynoldston
• Nicholaston
• Burry
• Landimore

Roads filed under SA3

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.

• Acacia Road
• Alder Way
• Alderwood Road
• Allchurch Gardens
• Amberley Drive
• Ambleside Place
• Amy Dillwyn Close
• Anderson Lane
• Appledore Place
• Applegrove
• Ashburnham Drive
• Atlantic Haven
• Bay View Gardens
• Baywood Avenue
• Beaufort Avenue
• Beaufort Close
• Beaufort Drive
• Beaufort Gardens
• Bellevue Road
• Belvedere Close
• Bendrick Drive
• Berma Close
• Bethany Lane
• Bettsland
• Birchfield Road
• Birkdale Close
• Bishopston Road
• Bishops Wood Grove
• Bosco Lane
• Bramley Drive
• Brandy Cove Close
• Brandy Cove Road
• Briarwood Gardens
• Bridle Mews
• Broadmead Crescent
• Broadparks
• Broadview Close
• Broadview Lane
• Brooklyn Gardens
• Brooklyn Terrace
• Brookvale Road
• Browns Drive
• Brynau Drive
• Bryncerdin Road
• Brynfield Road
• Bryn Terrace
• Bryn View Close
• Bude Haven Terrace
• Bunker's Hill
• Burnham Drive
• Burrows Close
• Burrows Lane
• Buttercup Court
• Cambridge Close
• Cambridge Gardens
• Cambridge Road
• Cartersford Place
• Castle Acre
• Castle Avenue
• Castle Crescent

Check an address in SA3

Check an address in SA3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SA3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SA3

What does an SA3 postcode tell you?

That the address lies in the SA3 district of the SA (Swansea) postcode area, and the place OS Open Names most often lists first for its postcodes is Abertawe. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 727 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 SA3

• SA25.6 km
• SA19.3 km
• SA59.4 km
• SA410.2 km
• SA613.9 km
• SA714.7 km
• SA1515.4 km
• SA1417.6 km
• SA1218.0 km
• SA1618.6 km
• SA1021.1 km
• SA821.1 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids