NN3
8 sectors, 1,315 postcodes
West Northamptonshire, North Northamptonshire
| Sector | Postcodes | Local authority |
|---|
| NN3 0 | 7 | West Northamptonshire |
| NN3 2 | 180 | West Northamptonshire |
| NN3 3 | 200 | West Northamptonshire |
| NN3 5 | 134 | West Northamptonshire |
| NN3 6 | 186 | West Northamptonshire |
| NN3 7 | 200 | West Northamptonshire |
| NN3 8 | 234 | West Northamptonshire |
| NN3 9 | 174 | West Northamptonshire |