# SG4

4 sectors, 906 postcodes

- **Part of:** [SG](https://openpostcodes.uk/SG)
- **Local authorities:** North Hertfordshire, Stevenage, Welwyn Hatfield

## Sectors

| Sector | Postcodes | Local authority |
|---|---|---|
| [SG4 0](https://openpostcodes.uk/SG4%200) | 184 | North Hertfordshire |
| [SG4 7](https://openpostcodes.uk/SG4%207) | 209 | North Hertfordshire |
| [SG4 8](https://openpostcodes.uk/SG4%208) | 281 | North Hertfordshire |
| [SG4 9](https://openpostcodes.uk/SG4%209) | 232 | North Hertfordshire |