DL12 postcode district

Postcodes and sectors

726 of the district's 871 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 54.57198, -1.98488, which locates the district, not a building.

Companies registered in DL12

Companies House lists 775 companies with a registered office in DL12; 131 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 DL12

• County Durham
• North East
• Barnard Castle
• Middleton-in-Teesdale
• Cotherstone
• Startforth
• Mickleton
• Bowes
• Eggleston
• Romaldkirk
• Whorlton
• Stainton Grove
• Holwick
• Lendings
• Newbiggin
• Stainton
• Lartington
• Forest-in-Teesdale
• Boldron
• Langdon Beck
• High Dyke
• Dent Bank
• Gilmonby
• Greta Bridge

Roads filed under DL12

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 Lane
• Albert Close
• Alston Road
• Ashtree Drive
• Back Lane
• Bail Hill Road
• Baliol Street
• Bartlemere
• Beaconsfield Court
• Beckside
• Bede Kirk
• Bede Road
• Beech Walk
• Billy Lane
• Birch Road
• Birkett Close
• Boldron Lane
• Botany Road
• Bouch Way
• Bowes Road
• Bridgegate
• Bridge Inn Yard
• Bridge Street
• Brignall Lane
• Briscoe Lane
• Broad Gates
• Broadmires Lane
• Burn Bank Court
• Burnhope Way
• California Row
• Cecil Road
• Chapel Lane
• Chapel Row
• Church Bank
• Churchill Road
• Claire House way
• Cleasbys Yard
• Cleveland Road
• Clint Lane
• Cobbler Gate Lane
• Collingwood Bank
• Corn Close
• Coronation Street
• Cote House Road
• Cotherstone Lane
• Croft Lane
• Croft Yoke Lane
• Crook Lane
• Dale Road
• Dale View
• Dark Lane
• Darlington Road
• Dawson Road
• Deerbolt Bank
• Demesne Lane
• Dene Road
• Dent Gate Lane
• Dickens Road
• Eggleston Lane
• Fairfield Road

Check an address in DL12

Check an address in DL12

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=DL12" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about DL12

What does a DL12 postcode tell you?

That the address lies in the DL12 district of the DL (Darlington) postcode area, and the place OS Open Names most often lists first for its postcodes is County Durham. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 726 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 DL12

• DL1316.2 km
• DL1116.3 km
• DL1420.9 km
• DL1522.5 km
• DL422.9 km
• DL225.6 km
• CA1725.7 km
• DL1025.9 km
• DL526.7 km
• DL327.0 km
• DL1628.2 km
• DL928.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids