KA21 postcode district

Postcodes and sectors

373 of the district's 442 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 55.64231, -4.78421, which locates the district, not a building.

Companies registered in KA21

Companies House lists 365 companies with a registered office in KA21; 72 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 KA21

• North Ayrshire
• Scotland
• Saltcoats

Roads filed under KA21

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.

• Abbotsford Place
• Adair Avenue
• Adams Avenue
• Ailsa Road
• Ainsworth Way
• Allan Gardens
• Anderson Drive
• Ardrossan Road
• Argyle Place
• Argyle Road
• Arran Place
• Arthurlie Place
• Arthur Street
• Ashdale Avenue
• Auchanshangan Drive
• Auchenharvie Road
• Auld Clay Road
• Barga Gardens
• Barnett Court
• Barnett Crescent
• Berchem Place
• Betsy Miller Wynd
• Blakely Road
• Blyth Crescent
• Border Avenue
• Border Place
• Boyd Orr Road
• Bradshaw Street
• Braehead Lane
• Braehead Place
• Braes Road
• Brown Place
• Burn Road
• Burns Avenue
• Bute Terrace
• Caafwater Place
• Caledonia Road
• Campbell Avenue
• Canal Place
• Canal Street
• Canal View
• Carey Road
• Carrick Avenue
• Catacol Avenue
• Chapelwell Street
• Christie Gardens
• Clark Place
• Clytus Court
• Colin Hay Drive
• Conn Drive
• Corrie Crescent
• Corsankell Wynd
• Countess Street
• Craigs Place
• Cumbrae Road
• Cunninghame Crescent
• Cunninghame Road
• Dalry Road
• Davaar Road
• Denny Crescent

Check an address in KA21

Check an address in KA21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=KA21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about KA21

What does a KA21 postcode tell you?

That the address lies in the KA21 district of the KA (Kilmarnock) postcode area, and the place OS Open Names most often lists first for its postcodes is Saltcoats. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 373 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 KA21

• KA221.8 km
• KA202.1 km
• KA135.5 km
• KA237.3 km
• KA127.9 km
• KA248.6 km
• KA1110.1 km
• KA1412.9 km
• KA2913.3 km
• KA1013.3 km
• KA2513.7 km
• KA214.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids