TS21 postcode district

Postcodes and sectors

545 of the district's 652 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 54.62564, -1.42636, which locates the district, not a building.

Companies registered in TS21

Companies House lists 837 companies with a registered office in TS21; 78 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 TS21

• North East
• County Durham
• Stockton-on-Tees
• Sedgefield
• Fishburn
• Stillington
• Darlington
• Long Newton
• Carlton
• Thorpe Thewles
• Redmarshall
• Bishopton
• Whitton
• Mordon
• Elton
• Great Stainton
• Butterwick
• Little Stainton
• Old Stillington
• Elstob
• Bradbury
• Foxton
• Thorpe Larches
• Grindon

Roads filed under TS21

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.

• Anesty Court
• Astral Drive
• Aycliffe Lane
• Back Lane
• Bainbridge Close
• Baliol Croft
• Bank Terrace
• Bassenthwaite Gardens
• Battersby Green
• Beacon Avenue
• Beacon Lane
• Beechwood Road
• Bellsmoor Close
• Bell Square
• Belsay Court
• Beveridge Close
• Bilsdale View
• Blakeston Lane
• Bleach House Bank
• Boyne Court
• Boynston Grove
• Brierley Drive
• Brock Close
• Brockwell Close
• Brook Drive
• Buckthorn Crescent
• Burdon Place
• Burnsall Grove
• Burn Wood Court
• Burtersett Crescent
• Burton Mews
• Butterwick Road
• Caden Court
• Carperby Close
• Cartwright Close
• Castle Eden Walkway
• Castlereagh Close
• Catkill Lane
• Chapel Gardens
• Cherry Tree Drive
• Chestnut Road
• Church Lane
• Church View
• Claremont Grove
• Cleveland Drive
• Cleveland View
• Coatham Lane
• Cobb Lane
• Cobby Castle Lane
• Collingwood Crescent
• Conifer Avenue
• Coniston Crescent
• Cordwainer Grove
• Coronation Avenue
• Cotterdale Drive
• Countersett Road
• Cragside
• Crispin Court
• Cross Street
• Cunningham Court

Check an address in TS21

Check an address in TS21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=TS21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about TS21

What does a TS21 postcode tell you?

That the address lies in the TS21 district of the TS (Cleveland) postcode area, and the place OS Open Names most often lists first for its postcodes is Sedgefield. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 545 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 TS21

• TS226.5 km
• TS197.6 km
• TS208.4 km
• TS239.3 km
• TS299.5 km
• DL179.6 km
• TS189.8 km
• DL59.8 km
• TS2811.6 km
• TS1612.3 km
• TS1712.7 km
• DL112.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids