Sectors in CM11
| Sector | Main place | Postcodes |
|---|---|---|
| CM11 1 | Billericay | 181 |
| CM11 2 | Billericay | 272 |
Places covered by CM11
- Billericay Basildon · 306
- Crays Hill Basildon · 43
- Ramsden Heath Chelmsford · 41
- Ramsden Bellhouse Basildon · 15
- Downham Chelmsford · 13
- Wickford Basildon · 4
- Brock Hill Chelmsford · 1
- Noak Hill Basildon · 1