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BT1 1NN
a defunct large user postcode in Northern Ireland
This postcode was deleted in December 1990.
The nearest currently active postcodes are:
North Street BT1 1NE
Union Street BT1 2JG
North Street BT1 1LF
Kent Street BT1 2JA
Kent Street BT1 2JJ
Laws Court BT1 1QS
North Street BT1 1ND
North Street BT1 1LE
Stephen Street BT1 2JE
BT1 2JB