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BT4 3SY
a defunct large user postcode in Northern Ireland
This postcode was deleted in May 2017.
The nearest currently active postcodes are:
Castle Buildings BT4 3TP
Stormont BT4 3TT
Stormont BT4 3UD
Stormont BT4 3WQ
Stormont BT4 3XX
BT4 3ST
Stormont BT4 3SS
Castle Buildings BT4 3SQ
BT4 3SH
Cloverhill Park BT4 2JW