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BT4 3SW
a defunct large user postcode in Northern Ireland
This postcode was deleted in December 1991.
The nearest currently active postcodes are:
Stormont BT4 3SS
BT4 3ST
Castle Buildings BT4 3TP
Stormont BT4 3TT
Stormont BT4 3UD
Stormont BT4 3WQ
Stormont BT4 3XX
Castle Buildings BT4 3SQ
BT4 3SH
Upper Newtownards Road BT4 3SR