DT3 postcode district

Postcodes and sectors

706 of the district's 812 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 50.64213, -2.46871, which locates the district, not a building.

Companies registered in DT3

Companies House lists 693 companies with a registered office in DT3; 46 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 DT3

• Dorset
• South West
• Weymouth
• Chickerell
• Portesham
• Osmington
• Abbotsbury
• Langton Herring
• Osmington Mills
• Buckland Ripers
• Fleet
• Bincombe
• Coldharbour
• Waddon
• West Shilvinghampton
• East Shilvinghampton
• Coryates
• Rodden

Roads filed under DT3

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.

• Abbotsbury Hill
• Alamanda Road
• Aldabrand Close
• Allberry Gardens
• Ambleside
• Angel Close
• Angel Lane
• Anvil Close
• Appletree Close
• Ashley Chase Lane
• Ash Way
• Australia Road
• Avocet Close
• Back Street
• Bailey Place
• Bank Farm Drove
• Barnes Wallis Close
• Barr Lane
• Barton Drive
• Bayard Road
• Baydon Close
• Beachdown Way
• Beech Road
• Beverley Road
• Bincombe Rise
• Birch Way
• Bishop's Road
• Bishops Close
• Blackberry Lane
• Blenheim Road
• Blind Lane
• Boardman Fields
• Bodkin Lane
• Bowleaze Coveway
• Boxwood Road
• Brackendown Avenue
• Brambling Close
• Bramdon Close
• Bramdon Lane
• Brentmere Close
• Bridge Inn Lane
• Bridlebank Way
• Brisbane Road
• Broadlands Road
• Broadwey Close
• Brookmead Close
• Brookside Close
• Brookton Lane
• Broome Avenue
• Brown's Crescent
• Brunel Drive
• Buckley Gardens
• Buddleia Close
• Budmouth Avenue
• Buller's Way
• Burton Road
• Butter Street
• Came Down Close
• Canberra Crescent
• Canberra Road

Check an address in DT3

Check an address in DT3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=DT3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about DT3

What does a DT3 postcode tell you?

That the address lies in the DT3 district of the DT (Dorchester) postcode area, and the place OS Open Names most often lists first for its postcodes is Weymouth. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 706 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 DT3

• DT43.6 km
• DT17.9 km
• DT510.5 km
• DT212.0 km
• BH2023.1 km
• DT624.2 km
• DT828.4 km
• DT1131.6 km
• BH1631.6 km
• DT933.5 km
• DT1034.2 km
• TA1834.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids