DN postcode area

Postcode district boundaries: Bing / Google

The DN postcode area, also known as the Doncaster postcode area, is a group of 32 postcode districts in England, which are subdivisions of 13 post towns. These postcode districts cover eastern South Yorkshire (including Doncaster), north Lincolnshire (including Grimsby, Scunthorpe, Barnetby, Barrow upon Humber, Barton-upon-Humber, Brigg, Cleethorpes, Gainsborough, Immingham and Ulceby), small parts of Nottinghamshire (including Retford) and the East Riding of Yorkshire (including Goole), and a very small part of North Yorkshire.

The S64 postcode district for Mexborough was originally earmarked as DN13, which has never been used. Otherwise, the area's districts are numbered sequentially up to DN22, then from DN31 to DN41 for the eastern spur of the area, in and around Grimsby.

There is one non-geographic district, DN55, which has a single purpose use to Royal Mail.

Coverage

The approximate coverage of the postcode districts:

Map

See also

List of postcode areas in the United Kingdom

For the purposes of directing mail, the United Kingdom is divided by Royal Mail into postcode areas. The postcode area is the largest geographical unit used and forms the initial characters of the alphanumeric UK postcode. There are currently 121 geographic postcode areas in use in the UK and a further 3 often combined with these covering the Crown Dependencies of Guernsey, Jersey and Isle of Man.

Subdivision

Each postcode area is further divided into post towns and postcode districts. There are on average 20 postcode districts to a postcode area. The London post town is instead divided into several postcode areas.

Scope

The single or pair of letters chosen for postcode areas are generally intended as a mnemonic for the places served. Postcode areas, post towns and postcode districts do not follow political boundaries and usually serve much larger areas than the place names with which they are associated. For example, within the PA postcode area the PA1 and PA78 postcode districts are 140 miles apart; and the eight postcode areas of the London post town cover only 40% of Greater London. The remainder of its area is covered by sections of twelve adjoining postcode areas: EN, IG, RM, DA, BR, TN, CR, SM, KT, TW, HA and UB.