The CA postcode area, also known as the Carlisle postcode area, is a group of postcode districts around Alston, Appleby-in-Westmorland, Beckermet, Brampton, Carlisle, Cleator, Cleator Moor, Cockermouth, Egremont, Frizington, Holmrook, Keswick, Kirkby Stephen, Maryport, Moor Row, Penrith, Ravenglass, Seascale, St Bees, Whitehaven, Wigton and Workington in England.