# CM11

2 sectors, 450 postcodes

- **Part of:** [CM](https://openpostcodes.uk/CM)
- **Local authorities:** Basildon, Chelmsford

## Sectors

| Sector | Postcodes | Local authority |
|---|---|---|
| [CM11 1](https://openpostcodes.uk/CM11%201) | 181 | Basildon |
| [CM11 2](https://openpostcodes.uk/CM11%202) | 269 | Basildon |