The DN9 3 postcode sector lies where the three counties of Lincolnshire, South Yorkshire and Lincolnshire meet. in the Yorkshire and the Humber region of England.
DN9 3 is a postcode sector within the DN9 postcode district which is within the DN Doncaster postcode area.
The Royal Mail delivery office for the DN9 3 postal sector is the Finningley Scale Payment Delivery Office.
The area of the DN9 3 postcode sector is 10.68 square miles which is 27.67 square kilometres or 6,837.95 square acres.
Waterways within the DN9 3 postcode sector include the River Torne.
The DN9 3 postcode sector is crossed by a railway.
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