The approximate coverage of the postcode districts:
| Postcode district | Post town | Coverage | Local authority area |
|---|---|---|---|
| CA1 | CARLISLE | Carlisle East | City of Carlisle |
| CA2 | CARLISLE | Carlisle South West | City of Carlisle |
| CA3 | CARLISLE | Carlisle North | City of Carlisle |
| CA4 | CARLISLE | Warwick Bridge, Wetheral, Cumwhinton & Armathwaite | City of Carlisle, Eden |
| CA5 | CARLISLE | Dalston and Burgh by Sands | City of Carlisle, Allerdale |
| CA6 | CARLISLE | Longtown, Bewcastle | City of Carlisle |
| CA7 | WIGTON; CARLISLE | Wigton, Silloth, Aspatria, Caldbeck & Hesket Newmarket | Allerdale, Eden |
| CA8 | BRAMPTON; CARLISLE | Brampton, Gilsland, Greenhead & Slaggyford | City of Carlisle, Northumberland (unitary) |
| CA9 | ALSTON | Alston, Garrigill & Nenthead | Eden, Northumberland |
| CA10 | PENRITH | Penrith Carleton Hall area, Shap, Tebay, Langwathby, Lazonby & Pooley Bridge | Eden, South Lakeland |
| CA11 | PENRITH | Penrith (most), Stainton, Mungrisdale, Glenridding & Patterdale | Eden |
| CA12 | KESWICK | Keswick, Seatoller, Braithwaite, Bassenthwaite & Threlkeld | Allerdale, Eden |
| CA13 | COCKERMOUTH | Cockermouth, Lorton & Buttermere | Allerdale |
| CA14 | WORKINGTON | Workington, Distington & Seaton | Allerdale, Copeland |
| CA15 | MARYPORT | Maryport, Dearham, Flimby & Allonby | Allerdale |
| CA16 | APPLEBY-IN-WESTMORLAND | Appleby-in-Westmorland | Eden |
| CA17 | KIRKBY STEPHEN | Kirkby Stephen, Brough & Ravenstonedale | Eden, South Lakeland |
| CA18 | RAVENGLASS | Ravenglass | Copeland |
| CA19 | HOLMROOK | Holmrook, Santon Bridge & Eskdale | Copeland |
| CA20 | SEASCALE | Seascale, Sellafield, Gosforth & Wasdale Head | Copeland |
| CA21 | BECKERMET | Beckermet | Copeland |
| CA22 | EGREMONT | Egremont & Thornhill | Copeland |
| CA23 | CLEATOR | Ennerdale Bridge | Copeland |
| CA24 | MOOR ROW | Moor Row | Copeland |
| CA25 | CLEATOR MOOR | Cleator Moor | Copeland |
| CA26 | FRIZINGTON | Frizington & Croasdale | Copeland |
| CA27 | ST. BEES | St. Bees | Copeland |
| CA28 | WHITEHAVEN | Whitehaven & Sandwith | Copeland |
| CA95 | WORKINGTON | non-geographic | Allerdale |
Read more about this topic: CA Postcode Area