The BB1 4 postcode sector is within the county of Lancashire in the North West of England.
BB1 4 is a postcode sector within the BB1 postcode district which is within the BB Blackburn postcode area.
The Royal Mail delivery office for the BB1 4 postal sector is the Blackburn Delivery Office.
The area of the BB1 4 postcode sector is 4.88 square miles which is 12.64 square kilometres or 3,124.01 square acres.
The BB1 4 postcode sector is crossed by the M65 motorway.
Waterways within the BB1 4 postcode sector include the Hyndburn Brook and Leeds and Liverpool Canal
The BB1 4 postcode sector is crossed by a railway.
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