What does a CA21 postcode tell you?

That the address lies in the CA21 district of the CA (Carlisle) postcode area, and the place OS Open Names most often lists first for its postcodes is Beckermet. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 37 live postcodes.

CA21 postcode district

CA21, in the CA (Carlisle) postcode area, has 37 live and 3 terminated postcodes in the ONS Postcode Directory of August 2026, and OS Open Names files 15 roads under it.

postcode area	CA (Carlisle)
live postcodes	37
terminated postcodes	3
sectors	1
roads listed	15
companies registered	27
centroid	54.44546, -3.51641
directory release	2026-08

Postcodes and sectors

37 of the district's 40 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 54.44546, -3.51641, which locates the district, not a building.

sector	live	terminated
CA21 2	37	3

Companies registered in CA21

Companies House lists 27 companies with a registered office in CA21 (1 October 2026 snapshot).

Places OS Open Names lists for CA21

Cumberland
North West
Beckermet
Braystones

Roads filed under CA21

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.

Bankfield
Beck Close
Beck Rise
Braystones Road
Fleming Drive
Hunter Rise
Kirkbeck Drive
Lowrey Close
Mill Lane
Morass Road
Nursery Road
Sellafield Road
Station Crescent
The Mill Fields
Yeorton Brow

Check an address in CA21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=CA21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about CA21

What does a CA21 postcode tell you?: That the address lies in the CA21 district of the CA (Carlisle) postcode area, and the place OS Open Names most often lists first for its postcodes is Beckermet. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 37 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 CA21

CA224.0 km
CA205.2 km
CA277.1 km
CA237.8 km
CA248.0 km
CA258.6 km
CA1910.7 km
CA2611.2 km
CA2811.6 km
CA1813.0 km
LA1918.8 km
CA1421.1 km
Every district
How a British address is written
Check any address

distance between the districts' centroids

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