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BT1 1XX
a defunct large user postcode in Northern Ireland
This postcode was deleted in September 2005.
The nearest currently active postcodes are:
BT1 1WL
Royal Avenue BT1 1FB
Royal Avenue BT1 1UR
Rosemary Street BT1 1QE
Castle Place BT1 1EL
Royal Avenue BT1 1DA
Rosemary Street BT1 1QB
Castle Place BT1 1GA
Donegall Arcade BT1 1PT
Castle Street BT1 1BL