What does a CA10 postcode tell you?

That the address lies in the CA10 district of the CA (Carlisle) postcode area, which the directory places around Westmorland and Furness. The inward half of the full postcode narrows it to a street or a building; the district alone does not, and an address written with a district and no inward half cannot be checked against the register.

Does a street listed here mean an address on it exists?

It means OS Open Names lists a road of that name under the district, which is what the address lookup answers as a street-level match. It says nothing about any building on it: Great Britain publishes no open register of buildings, so the lookup answers exists: null there and confirms the street alone.

Who lives at these postcodes?

Nobody on this page. A postcode directory says whether a code is in use, never who is there, and a streets register lists roads, not occupants. The address lookup carries no field about a person and never will.

CA10 postcode district

What the public directories installed here say about the CA10 postcode district: how many of its postcodes are in use, the places OS Open Names lists for them, the streets it files under the district and the district's centroid. Counted from the national postcode directory and OS Open Names on 2026-09-18, and never about who is at an address.

postcode area	CA (Carlisle)
live postcodes	692
terminated postcodes	80
streets listed	251
centroid	54.61314, -2.65922
counted on	2026-09-18

Places the directory lists for CA10

OS Open Names places the district's postcodes in these settlements, boroughs, counties and regions, most often first. A town written as any of them matches the directory in an address lookup, and one written as another place in the CA area is reported but not scored.

Westmorland and Furness
North West
Shap
Lazonby
Tebay
Kirkby Thore
Langwathby
Eamont Bridge
Culgaith
Kirkoswald
Clifton
Temple Sowerby
Sockbridge
Orton
Morland
Melmerby
Askham
Cliburn
Crosby Ravensworth
Lowther
Pooley Bridge
Yanwath
Great Strickland
Ousby

Postcodes in use

692 postcodes in CA10 were in use on the day of the count. A postcode directory says whether a code is in use, never who is there. 80 of its 772 postcodes have been terminated: a real address written with one has moved on, which is not the same thing as a typo, and the address lookup scores it rather than refusing it.

Centroid: 54.61314, -2.65922 — the mean of the live postcodes' centroids, which locates the district, not any building in it.

Streets filed under CA10

OS Open Names files 251 roads under CA10. 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.

A685
Airygill Lane
Ashfield Court
Ash Gardens
B5320
B6260
B6261
B6262
B6412
Back Lane
Bank Lane
Barton Dale
Bateman Lane
Beechwood
Beggars Lane
Bessy Bank
Betsy Lane
Bluebell Drive
Brackenslack Lane
Brookfield

the first 20 of 251, alphabetically

Check an address in CA10

The address checker opens on Great Britain with the district in the field: add the street, the number and the full postcode, and it answers the postcode's status, whether the street is filed under the district, and what kind of delivery point the address names.

Check an address in CA10

curl https://spaw.co/api/v1/address \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"address": "10 Downing Street, London CA10 …", "country": "GB"}'

Common questions about CA10

What does a CA10 postcode tell you?: That the address lies in the CA10 district of the CA (Carlisle) postcode area, which the directory places around Westmorland and Furness. The inward half of the full postcode narrows it to a street or a building; the district alone does not, and an address written with a district and no inward half cannot be checked against the register.
Does a street listed here mean an address on it exists?: It means OS Open Names lists a road of that name under the district, which is what the address lookup answers as a street-level match. It says nothing about any building on it: Great Britain publishes no open register of buildings, so the lookup answers exists: null there and confirms the street alone.
Who lives at these postcodes?: Nobody on this page. A postcode directory says whether a code is in use, never who is there, and a streets register lists roads, not occupants. The address lookup carries no field about a person and never will.

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.

Data synced on 2026-09-18: the newest register or postcode directory copy installed here.

Other districts in CA

Wrong result, or is it about you? If this tool said something you think is wrong, tell us and a person reads it. If Spaw is holding data about you and you never signed up here — a customer may have had your address verified, or reported that a message to it bounced — erase it yourself, confirmed by mail to that address and with no account needed.

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