The AL3 5 postcode sector is within the county of Hertfordshire in the East of England.
AL3 5 is a postcode sector within the AL3 postcode district which is within the AL St Albans postcode area.
The Royal Mail delivery office for the AL3 5 postal sector is the St. Albans Delivery Office.
The area of the AL3 5 postcode sector is 0.92 square miles which is 2.39 square kilometres or 590.38 square acres.
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