NN1
6 sectors, 832 postcodes
West Northamptonshire
| Sector | Postcodes | Local authority |
|---|
| NN1 1 | 132 | West Northamptonshire |
| NN1 2 | 154 | West Northamptonshire |
| NN1 3 | 121 | West Northamptonshire |
| NN1 4 | 199 | West Northamptonshire |
| NN1 5 | 159 | West Northamptonshire |
| NN1 9 | 67 | West Northamptonshire |