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NN1 1YY
a defunct large user postcode in Northampton, West Northamptonshire
This postcode was deleted in January 2003.
The nearest currently active postcodes are:
St. Marys Street NN1 2RH
Pike Lane NN1 2RJ
Marefair NN1 1SR
Freeschool Street NN1 1ST
Doddridge Street NN1 2RN
Horsemarket NN1 2RG
NN1 1FD
St. Peters Gardens NN1 1SX
St. Katherines Terrace NN1 2AX
Horsemarket NN1 2RQ