All postcodes in NN4 1
| Postcode | Place | Type |
|---|---|---|
| NN4 1ZN | Northampton | large user |
| NN4 1ZR | Northampton | large user |
| NN4 1ZY | Northampton | large user |
Postcodes in sector NN4 1
Sector NN4 1 is part of the NN4 district in Northampton. All 3 of its live postcodes are listed below.