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SG1 1YX
a defunct large user postcode in Stevenage, Stevenage, Hertfordshire
This postcode was deleted in December 1994.
The nearest currently active postcodes are:
Norton Road SG1 2BB
Norton Road SG1 2LX
Norton Road SG1 2JY
SG1 2FZ
SG1 1AU
SG1 1AT
SG1 1AW
London Road SG1 1AE
London Road SG1 2TP
London Road SG1 2GA