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BT1 4WN
a defunct large user postcode in Northern Ireland
This postcode was deleted in March 2001.
The nearest currently active postcodes are:
William Street South BT1 4AR
Arthur Street BT1 4GE
BT1 4FT
Arthur Street BT1 4GD
Arthur Street BT1 4GF
Arthur Square BT1 4FD
Arthur Square BT1 4FF
Arthur Street BT1 4GA
Arthur Street BT1 4GB
William Street South BT1 4FJ