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SG6 4HX
a defunct large user postcode in Letchworth Garden, North Hertfordshire, Hertfordshire
This postcode was deleted in December 1990.
The nearest currently active postcodes are:
Wilbury Road SG6 4JJ
Kite Way SG6 4YQ
Linnet Close SG6 4FA
Haymoor SG6 4HT
Hawkfield SG6 4JE
Haymoor SG6 4HS
Cowslip Hill SG6 4HN
Jay Close SG6 4YH
Kingfisher Court SG6 4NT
Wilbury Road SG6 4JL