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IP1 1DU
a defunct large user postcode in Ipswich, Ipswich, Suffolk
This postcode was deleted in February 2006.
The nearest currently active postcodes are:
Butter Market Shopping Centre IP1 1DT
Butter Market IP1 1BG
Butter Market IP1 1BP
Butter Market IP1 1DS
Butter Market IP1 1BQ
Queen Street IP1 1SP
Queen Street IP1 1SW
Butter Market IP1 1BE
Butter Market IP1 1BB
Thoroughfare IP1 1BY