SN3 postcode district

Postcodes and sectors

1,310 of the district's 1,760 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 51.56155, -1.74475, which locates the district, not a building.

Companies registered in SN3

Companies House lists 2,251 companies with a registered office in SN3; 484 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 SN3

• Swindon
• South West
• Stratton St Margaret
• South Marston
• Wanborough

Roads filed under SN3

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.

• Abney Moor
• Acorn Close
• Adonis Row
• Ainsworth Road
• Albany Close
• Allen Close
• Alvescot Road
• Amersham Road
• Anderson Close
• Annapurna
• Aragon Court
• Arlington Close
• Arnfield Moor
• Arundel Close
• Ashbury Avenue
• Ashcombe Close
• Ash Gardens
• Ashkirk Close
• Ashley Close
• Ashmore Close
• Ashwell Close
• Austen Crescent
• Avocet Close
• Axbridge Close
• Axford Close
• Aymer Place
• Azelin Court
• Bader Lane
• Ballyack Close
• Balmoral Close
• Bampton Grove
• Banbury Close
• Banwell Avenue
• Barnard Close
• Barnes Road
• Barn Moor Close
• Barnstaple Close
• Baron Close
• Barrington Close
• Barrowby Gate
• Barrowby Mews
• Baskerville Road
• Baynton Street
• Beaufort Green
• Beaumont Road
• Beddington Court
• Bedford Road
• Belcombe Close
• Bell Gardens
• Belmont Close
• Belvedere Road
• Bembridge Close
• Bentley Close
• Berenger Close
• Beresford Close
• Berkeley Lawns
• Berrington Road
• Berryfield
• Beverstone Grove
• Bevisland

Check an address in SN3

Check an address in SN3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SN3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SN3

What does an SN3 postcode tell you?

That the address lies in the SN3 district of the SN (Swindon) postcode area, and the place OS Open Names most often lists first for its postcodes is Swindon. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,310 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 SN3

• SN12.9 km
• SN23.2 km
• SN384.5 km
• SN256.0 km
• SN266.5 km
• SN56.6 km
• SN66.7 km
• SN47.1 km
• SN715.7 km
• SN817.7 km
• GL719.6 km
• RG1721.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids