Sectors in CO4
| Sector | Main place | Postcodes |
|---|---|---|
| CO4 0 | Colchester | 168 |
| CO4 3 | Colchester | 346 |
| CO4 5 | Colchester | 394 |
| CO4 6 | Colchester | 91 |
| CO4 7 | Colchester | 4 |
| CO4 9 | Colchester | 190 |
Places covered by CO4
- Colchester Colchester · 1,059
- Langham Colchester · 21
- Boxted Cross Colchester · 14
- Boxted Colchester · 13
- Boxted Colchester · 7
- Workhouse Hill Colchester · 4
- Hornestreet Colchester · 2