# SG3

1 sector, 206 postcodes

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

## Sectors

| Sector | Postcodes | Local authority |
|---|---|---|
| [SG3 6](https://openpostcodes.uk/SG3%206) | 206 | North Hertfordshire |