# SO21

3 sectors, 743 postcodes

- **Part of:** [SO](https://openpostcodes.uk/SO)
- **Local authorities:** Winchester, Test Valley, Basingstoke and Deane, Eastleigh

## Sectors

| Sector | Postcodes | Local authority |
|---|---|---|
| [SO21 1](https://openpostcodes.uk/SO21%201) | 299 | Winchester |
| [SO21 2](https://openpostcodes.uk/SO21%202) | 201 | Winchester |
| [SO21 3](https://openpostcodes.uk/SO21%203) | 243 | Winchester |