# BT21

1 sector, 244 postcodes

- **Part of:** [BT](https://openpostcodes.uk/BT)
- **Local authorities:** Ards and North Down

## Sectors

| Sector | Postcodes | Local authority |
|---|---|---|
| [BT21 0](https://openpostcodes.uk/BT21%200) | 244 | Ards and North Down |