DN40 postcode district

Postcodes and sectors

456 of the district's 627 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 53.62099, -0.22722, which locates the district, not a building.

Companies registered in DN40

Companies House lists 561 companies with a registered office in DN40; 38 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for DN40

• Yorkshire and the Humber
• North East Lincolnshire
• Immingham
• North Lincolnshire
• South Killingholme
• East Halton
• Habrough
• North Killingholme

Roads filed under DN40

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Access Road 3
• Ainsworth Road
• Aire Close
• Alden Close
• Alderney Way
• Alexandra Road South
• Allerton Drive
• Allerton Way
• Ancholme Avenue
• Anglesey Drive
• Arran Close
• Ash Tree Close
• Atwood Close
• Balfour Place
• Baptist Chapel Lane
• Barnard Walk
• Battery Street
• Beech Tree Drive
• Beechwood Avenue
• Berwick Court
• Birkdale Drive
• Blair Walk
• Blossom Way
• Bluestone Lane
• Bowman Way
• Bradford Road
• Brewster Avenue
• Briar Close
• Brick Lane
• Brocklesby Avenue
• Brocklesby Road
• Burton Road
• Calder Close
• Carisbrooke Walk
• Carver Road
• Cedar Drive
• Celandine Close
• Chapel Lane
• Chapel Road
• Chase Hill Road
• Cherry Tree Lane
• Chestnut Avenue
• Chilton Close
• Church Lane
• Clarence Close
• Clarkes Road
• Cleveland Close
• Clough Lane
• Clyfton Crescent
• College Road
• Collier Road
• Coppin Drive
• Copse Close
• Corfe Walk
• Craik Hill Avenue
• Cravens Lane
• Crook Mill Road
• Cushman Crescent
• Deane Road
• Dowland Way

Check an address in DN40

Check an address in DN40

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=DN40" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about DN40

What does a DN40 postcode tell you?

That the address lies in the DN40 district of the DN (Doncaster) postcode area, and the place OS Open Names most often lists first for its postcodes is Immingham. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 456 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest DN40

• DN414.9 km
• DN397.2 km
• DN3410.3 km
• DN3110.7 km
• DN3710.9 km
• DN1911.2 km
• DN3212.3 km
• DN3312.4 km
• DN3812.7 km
• HU1213.3 km
• DN3514.6 km
• HU115.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids