# HP3

3 sectors, 763 postcodes

- **Part of:** [HP](https://openpostcodes.uk/HP)
- **Local authorities:** Dacorum, Three Rivers, St Albans

## Sectors

| Sector | Postcodes | Local authority |
|---|---|---|
| [HP3 0](https://openpostcodes.uk/HP3%200) | 219 | Dacorum |
| [HP3 8](https://openpostcodes.uk/HP3%208) | 220 | Dacorum |
| [HP3 9](https://openpostcodes.uk/HP3%209) | 324 | Dacorum |