# HP4

4 sectors, 736 postcodes

- **Part of:** [HP](https://openpostcodes.uk/HP)
- **Local authorities:** Dacorum, Buckinghamshire, Central Bedfordshire

## Sectors

| Sector | Postcodes | Local authority |
|---|---|---|
| [HP4 1](https://openpostcodes.uk/HP4%201) | 201 | Dacorum |
| [HP4 2](https://openpostcodes.uk/HP4%202) | 239 | Dacorum |
| [HP4 3](https://openpostcodes.uk/HP4%203) | 289 | Dacorum |
| [HP4 9](https://openpostcodes.uk/HP4%209) | 7 | Dacorum |