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NN1 3YW
a defunct large user postcode in Northampton, West Northamptonshire
This postcode was deleted in October 2000.
The nearest currently active postcodes are:
Barrack Road NN1 3RL
Leicester Terrace NN2 6AJ
Leicester Street NN1 3RS
Leicester Terrace NN2 6AL
NN1 9FU
NN1 9FX
NN1 9FZ
NN1 9GD
NN1 9GH
NN1 9GN