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SG6 9FU
a defunct large user postcode in Letchworth Garden, North Hertfordshire, Hertfordshire
This postcode was deleted in October 2018.
The nearest currently active postcodes are:
SG6 9GD
SG6 9DT
SG7 5NG
SG7 5SH
SG7 5SS
SG7 5ST
SG7 6XE
SG7 6ZP
SG6 9FX
SG6 9GB