Sectors in NN4
| Sector | Main place | Postcodes |
|---|---|---|
| NN4 0 | Northampton | 184 |
| NN4 1 | Northampton | 3 |
| NN4 4 | Northampton | 22 |
| NN4 5 | Northampton | 75 |
| NN4 6 | Northampton | 207 |
| NN4 7 | Northampton | 81 |
| NN4 8 | Northampton | 264 |
| NN4 9 | Northampton | 144 |
Places covered by NN4
- Northampton West Northamptonshire · 899
- Collingtree West Northamptonshire · 47
- Great Houghton West Northamptonshire · 16
- Swan Valley West Northamptonshire · 8