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SG6 3LZ
a defunct large user postcode in Letchworth Garden, North Hertfordshire, Hertfordshire
This postcode was deleted in December 1990.
The nearest currently active postcodes are:
Hitchin Road SG6 3LX
Briar Patch Lane SG6 3LY
Highfield SG6 3QD
Hitchin Road SG6 3LU
Pasture Road SG6 3LS
Highfield SG6 3QA
Hitchin Road SG6 3LT
Highfield SG6 3QB
Highfield SG6 3PY
Hitchin Road SG6 3NA