DE21 postcode district

Postcodes and sectors

1,261 of the district's 1,452 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 52.93420, -1.43171, which locates the district, not a building.

Companies registered in DE21

Companies House lists 3,700 companies with a registered office in DE21; 605 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 DE21

• East Midlands
• Derby
• City of Derby
• Derbyshire
• Erewash
• Little Eaton
• Amber Valley
• Breadsall
• Horsley
• Coxbench

Roads filed under DE21

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.

• Abbey Hill
• Abbot Close
• Aberdare Close
• Acer Croft
• Acorn Way
• Albemarle Road
• Albert Crescent
• Albert Road
• Alder Close
• Alderley Court
• Alfreton Road
• Alison Close
• Alport Heights Drive
• Alsager Close
• Amesbury Lane
• Anglers' Lane
• Anglesey Street
• Anstey Court
• Appledore Drive
• Applegate Close
• Applemead Close
• Appleton Close
• Argyll Close
• Armscote Close
• Arnhem Terrace
• Arridge Road
• Arundel Drive
• Ashcombe Gardens
• Ashfield Avenue
• Ashgrove Court
• Ashlyn Road
• Ashover Close
• Ashover Road
• Ash Tree Close
• Ashworth Avenue
• Ashworth Walk
• Aspen Drive
• Asterdale View
• Atchison Gardens
• Athlone Close
• Atlas Way
• Atlow Road
• Attlebridge Close
• Audrey Drive
• Autumn Grove
• Averham Close
• Avondale Road
• Aylesbury Avenue
• Ayr Close
• Badger Close
• Balleny Close
• Bamburgh Close
• Bandy Lane
• Bangor Street
• Bank Field Drive
• Barcheston Close
• Bardsey Court
• Barley Close
• Barley Corn Close
• Barnard Road

Check an address in DE21

Check an address in DE21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=DE21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about DE21

What does a DE21 postcode tell you?

That the address lies in the DE21 district of the DE (Derby) postcode area, and the place OS Open Names most often lists first for its postcodes is Derby. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,261 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 DE21

• DE13.3 km
• DE224.6 km
• DE245.2 km
• DE235.8 km
• DE726.7 km
• DE38.0 km
• DE78.5 km
• DE739.6 km
• DE7510.2 km
• DE5610.2 km
• NG1010.6 km
• DE512.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids