Sectors in CH42
| Sector | Main place | Postcodes |
|---|---|---|
| CH42 0 | Birkenhead | 72 |
| CH42 1 | Birkenhead | 88 |
| CH42 2 | Birkenhead | 62 |
| CH42 3 | Birkenhead | 49 |
| CH42 4 | Birkenhead | 83 |
| CH42 5 | Birkenhead | 60 |
| CH42 6 | Birkenhead | 71 |
| CH42 7 | Birkenhead | 50 |
| CH42 8 | Birkenhead | 67 |
| CH42 9 | Birkenhead | 86 |
Places covered by CH42
- Birkenhead Wirral · 676
- Bebington Wirral · 12