CH
38 districts, 19,083 postcodes
Wirral, Cheshire West and Chester, Flintshire, Denbighshire, Cheshire East
| District | Postcodes | Local authority |
|---|---|---|
| CH1 | 1,050 | Cheshire West and Chester |
| CH2 | 852 | Cheshire West and Chester |
| CH25 | 37 | Wirral |
| CH26 | 7 | Wirral |
| CH27 | 21 | Wirral |
| CH28 | 5 | Wirral |
| CH29 | 20 | Wirral |
| CH3 | 1,110 | Cheshire West and Chester |
| CH30 | 1 | Wirral |
| CH31 | 9 | Wirral |
| CH32 | 14 | Wirral |
| CH33 | 7 | Cheshire West and Chester |
| CH34 | 64 | Cheshire West and Chester |
| CH4 | 921 | Cheshire West and Chester |
| CH41 | 790 | Wirral |
| CH42 | 688 | Wirral |
| CH43 | 934 | Wirral |
| CH44 | 772 | Wirral |
| CH45 | 758 | Wirral |
| CH46 | 593 | Wirral |
| CH47 | 343 | Wirral |
| CH48 | 502 | Wirral |
| CH49 | 673 | Wirral |
| CH5 | 1,165 | Flintshire |
| CH6 | 444 | Flintshire |
| CH60 | 461 | Wirral |
| CH61 | 418 | Wirral |
| CH62 | 821 | Wirral |
| CH63 | 822 | Wirral |
| CH64 | 642 | Cheshire West and Chester |
| CH65 | 819 | Cheshire West and Chester |
| CH66 | 994 | Cheshire West and Chester |
| CH7 | 1,584 | Flintshire |
| CH70 | 42 | Cheshire West and Chester |
| CH8 | 681 | Flintshire |
| CH88 | 1 | Cheshire West and Chester |
| CH90 | 1 | — |
| CH99 | 17 | Cheshire West and Chester |