CA postcode area
The CA area holds 29 districts and 12,890 live postcodes; its largest place is Carlisle.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| CA1 | 674 | — |
| CA2 | 956 | Denton Holme |
| CA3 | 536 | Carlisle |
| CA4 | 478 | Scotby |
| CA5 | 353 | Dalston |
| CA6 | 519 | Longtown |
| CA7 | 1,227 | Annan |
| CA8 | 616 | Brampton |
| CA9 | 178 | Alston |
| CA10 | 692 | Shap |
| CA11 | 1,117 | Penrith |
| CA12 | 470 | Keswick |
| CA13 | 615 | Cockermouth |
| CA14 | 1,308 | Workington |
| CA15 | 576 | Maryport |
| CA16 | 267 | Appleby-in-Westmorland |
| CA17 | 230 | Kirkby Stephen |
| CA18 | 25 | — |
| CA19 | 68 | — |
| CA20 | 196 | Seascale |
| CA21 | 37 | Beckermet |
| CA22 | 268 | Egremont |
| CA23 | 73 | — |
| CA24 | 38 | Moor Row |
| CA25 | 228 | Cleator Moor |
| CA26 | 116 | Frizington |
| CA27 | 56 | Saint Bees |
| CA28 | 969 | Whitehaven |
| CA95 | 4 | — |
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.