DL1 postcode district

Postcodes and sectors

1,411 of the district's 2,047 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 54.53014, -1.53880, which locates the district, not a building.

Companies registered in DL1

Companies House lists 2,868 companies with a registered office in DL1; 510 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 DL1

• North East
• Darlington
• Beaumont Hill
• County Durham
• Coatham Mundeville
• Barmpton
• Brafferton
• Newton Ketton

Roads filed under DL1

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.

• Aberdeen Road
• Aintree Court
• Ajax Street
• Albatross Way
• Albert Road
• Aldam Street
• Aldbrough Walk
• Alderman Best Way
• Alderwood Close
• Alexander Street
• Allan Street
• Allington Way
• Alnwick Place
• Alston Moor Close
• Ambleside Walk
• Anfield Court
• Annandale
• Anstruther Drive
• Appleby Close
• Aquinas Court
• Ardmore Drive
• Argyll Close
• Arkendale Street
• Arkle Crescent
• Arnold Road
• Arran Walk
• Askrigg Street
• Atholl Close
• Audrey Grove
• Augusta Close
• Avon Way
• Aycliffe Lane
• Ayresome Way
• Aysgarth Road
• Back Greenwell Street
• Backhouse Street
• Back Lane
• Badminton Close
• Bakehouse Hill
• Baldwin Lane
• Balmoral Road
• Baltimore Way
• Bamburgh Place
• Bangor Grove
• Banks Road
• Bank Top Mews
• Barden Moor Road
• Barmpton Lane
• Barrington Way
• Barton Street
• Bay Tree Road
• Beacon Hill
• Beadnell Close
• Beauly Drive
• Beaumont Hill
• Beaumont Street
• Beaumont Street West
• Beck Road
• Bedford Street
• Beech Rise

Check an address in DL1

Check an address in DL1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=DL1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about DL1

What does a DL1 postcode tell you?

That the address lies in the DL1 district of the DL (Darlington) postcode area, and the place OS Open Names most often lists first for its postcodes is Darlington. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,411 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 DL1

• DL32.1 km
• DL23.6 km
• DL510.1 km
• TS1611.8 km
• TS2112.9 km
• DL413.0 km
• TS1913.7 km
• TS1514.0 km
• TS1814.3 km
• TS1715.1 km
• TS2015.8 km
• DL1016.2 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids