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CB21 4XR
a defunct large user postcode in Horseheath, Cambridgeshire
This postcode was deleted in January 2021.
The nearest currently active postcodes are:
CB21 4BB
CB21 4WD
CB21 4YZ
CB21 4ZQ
CB21 4SJ
CB21 4UY
West Wickham Road CB21 4XX
CB21 4WE
CB21 4XW
CB21 4WJ