CA20 postcode district

Postcodes and sectors

196 of the district's 227 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 54.41064, -3.46173, which locates the district, not a building.

Companies registered in CA20

Companies House lists 118 companies with a registered office in CA20; none of them at an address 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 CA20

• Cumberland
• North West
• Seascale
• Gosforth
• Calder Bridge
• Wellington
• Sellafield
• New Mill
• Ponsonby
• High Sellafield
• Nether Wasdale
• Wasdale Head

Roads filed under CA20

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.

• Albert Street
• Black Sail Pass
• Coniston Avenue
• Corridor Route
• Croft Head Road
• Cross Lanes
• Denton Park
• Denton Park Court
• Drigg Road
• Ellerslie Park
• Eskdale Avenue
• Fell View Road
• Gosforth Road
• Green Close
• Hallbeck Place
• Hallsenna Lane
• Hallsenna Road
• Highfield Close
• Leagate Brow
• Lingmell Crescent
• Lingmell Wood
• Links Crescent
• Long Walk
• Low Lonnin
• Meadow Close
• Meadowfield
• Meadowfield Grove
• Moses' Trod
• North Drive
• Nursery Road
• Old Corpse Road
• Pelham Drive
• Rueberry Drive
• Santon Way
• Scawfell Crescent
• Seascale Park
• South Parade
• Stubshead Lane
• Summerscales
• Tarn How Lane
• The Bridles
• The Crescent
• The Drive
• The Dunes
• The Fairways
• The Loudons
• Toft Lane
• Walkmill Gardens
• Wasdale Park
• Wasdale Road
• Wastwater Rise
• Whitecroft
• Whole House Road
• A595

Check an address in CA20

Check an address in CA20

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=CA20" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about CA20

What does a CA20 postcode tell you?

That the address lies in the CA20 district of the CA (Carlisle) postcode area, and the place OS Open Names most often lists first for its postcodes is Seascale. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 196 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 CA20

• CA215.2 km
• CA195.6 km
• CA187.8 km
• CA229.0 km
• CA2311.8 km
• CA2712.4 km
• CA2412.8 km
• CA2513.1 km
• LA1913.7 km
• CA2614.9 km
• CA2816.6 km
• LA2021.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids