The BB3 1 postcode sector is within the county of Lancashire in the North West of England.
BB3 1 is a postcode sector within the BB3 postcode district which is within the BB Blackburn postcode area.
The Royal Mail delivery office for the BB3 1 postal sector is the Darwen Delivery Office.
The area of the BB3 1 postcode sector is 0.79 square miles which is 2.04 square kilometres or 505.12 square acres.
The BB3 1 postcode sector is crossed by a railway.
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