AL6 postcode district

Postcodes and sectors

506 of the district's 657 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 51.83224, -0.19979, which locates the district, not a building.

Companies registered in AL6

Companies House lists 1,001 companies with a registered office in AL6; 108 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 AL6

• Hertfordshire
• Eastern
• Welwyn Hatfield
• Welwyn
• Oaklands
• East Hertfordshire
• Welwyn Garden City
• North Hertfordshire
• Tewin
• Tewin Wood
• Rableyheath
• Burnham Green
• Ayot Green
• Ayot St Lawrence
• Pottersheath
• Harmer Green
• St. Albans
• Bull's Green
• Ayot St Peter

Roads filed under AL6

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.

• Acorn Glade
• Adele Avenue
• Akers Court
• Archers Green Lane
• Ayot Green
• Ayot Little Green Lane
• Ayot St Peter Road
• Back Lane
• Badgers Walk
• Barbara Court
• Becket Gardens
• Bibbs Hall Lane
• Birch Grove
• Bishops Road
• Blakes Way
• Bluebells
• Bowmans Close
• Bracken Lane
• Briary Wood End
• Briary Wood Lane
• Brickwall Close
• Bride Hall Lane
• Broomfield Close
• Broomfield Road
• Broom Hill
• Burgess Place
• Burnham Close
• Burnham Green Road
• Butterwick Way
• Cannons Meadow
• Canons Field
• Canonsfield Road
• Carleton Rise
• Chatt Court
• Chestnut Walk
• Churchfield Road
• Church Place
• Church Street
• Clock House Gardens
• Cob Lane Close
• Codicote Road
• Colyer Close
• Copper Beeches
• Copse Hill
• Cowpers Way
• Cubitts Close
• Cylers Thicket
• Danesbury Lane
• Danesbury Park
• Danesbury Park Road
• Darby Drive
• Desborough Drive
• Dewars Close
• Dicket Mead
• Digswell Hill
• Digswell Lane
• Digswell Park Road
• Dolesbury Drive
• Dolphin Court
• Douglas Close

Check an address in AL6

Check an address in AL6

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=AL6" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about AL6

What does an AL6 postcode tell you?

That the address lies in the AL6 district of the AL (St Albans) postcode area, and the place OS Open Names most often lists first for its postcodes is Welwyn. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 506 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 AL6

• AL83.3 km
• SG33.3 km
• AL74.0 km
• SG27.6 km
• SG147.7 km
• AL108.3 km
• SG19.0 km
• AL49.2 km
• AL99.8 km
• SG1310.1 km
• SG410.5 km
• AL510.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids