The B31 postcode district is a postal district with a population of 54,302 and is within the B Birmingham postcode area.
The area of the B31 postcode district is 5.78 square miles which is 14.98 square kilometres or 3,701.06 acres.
There are 5 postcode sectors within the B31 district.
|Postcode Sector||Delivery Office|
|B31 1||Northfield Delivery Office|
|B31 2||Northfield Delivery Office|
|B31 3||Northfield Delivery Office|
|B31 4||Northfield Delivery Office|
|B31 5||Northfield Delivery Office|