Districts in the NN area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| NN1 | Northampton | West Northamptonshire | 6 | 830 |
| NN2 | Northampton | West Northamptonshire | 4 | 798 |
| NN3 | Northampton | West Northamptonshire | 8 | 1,315 |
| NN4 | Northampton | West Northamptonshire | 8 | 980 |
| NN5 | Northampton | West Northamptonshire | 5 | 893 |
| NN6 | Earls Barton | West Northamptonshire | 5 | 1,191 |
| NN7 | Roade | West Northamptonshire | 5 | 859 |
| NN8 | Wellingborough | North Northamptonshire | 7 | 1,254 |
| NN9 | Raunds | North Northamptonshire | 2 | 675 |
| NN10 | Rushden | North Northamptonshire | 5 | 859 |
| NN11 | Daventry | West Northamptonshire | 9 | 1,182 |
| NN12 | Towcester | West Northamptonshire | 4 | 838 |
| NN13 | Brackley | West Northamptonshire | 4 | 565 |
| NN14 | Desborough | North Northamptonshire | 5 | 1,223 |
| NN15 | Kettering | North Northamptonshire | 4 | 950 |
| NN16 | Kettering | North Northamptonshire | 4 | 897 |
| NN17 | Corby | North Northamptonshire | 6 | 909 |
| NN18 | Corby | North Northamptonshire | 3 | 658 |
| NN29 | Irchester | North Northamptonshire | 1 | 280 |