The BB10 4 postcode sector stands on the Lancashire and West Yorkshire border in the North West of England.
BB10 4 is a postcode sector within the BB10 postcode district which is within the BB Blackburn postcode area.
The Royal Mail delivery office for the BB10 4 postal sector is the Burnley Delivery Office.
The area of the BB10 4 postcode sector is 5.89 square miles which is 15.26 square kilometres or 3,771.05 square acres.
Waterways within the BB10 4 postcode sector include the River Calder.
The BB10 4 postcode sector is crossed by a railway.
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