AL10 postcode district

Postcodes and sectors

786 of the district's 1,211 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 51.76019, -0.23254, which locates the district, not a building.

Companies registered in AL10

Companies House lists 2,745 companies with a registered office in AL10; 232 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 AL10

• Welwyn Hatfield
• Hertfordshire
• Eastern
• Hatfield
• Welham Green

Roads filed under AL10

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.

• Acacia Street
• Alban Way
• Albatross Way
• Aldykes
• Allen Court
• Almond Walk
• Ashbury Close
• Ash Drive
• Ashley Court
• Astwick Avenue
• Aviation Avenue
• Badger Way
• Barlow Close
• Beaconsfield Road
• Beech Close
• Birch Drive
• Birchway
• Birchwood Avenue
• Birchwood Close
• Bishops Close
• Bishop Square
• Bishops Rise
• Blackthorne Close
• Bluebell Way
• Bradshaws
• Brain Close
• Bramble Road
• Branch Close
• Breaks Road
• Briars Close
• Briars Lane
• Briars Wood
• Brickfield
• Broad Acres
• Brookside
• Broom Close
• Bullrush Close
• Burfield Close
• Burnside Close
• Bury Road
• Buttercup Close
• Campion Road
• Cavendish Way
• Cecil Crescent
• Cedar Road
• Chantry Lane
• Chelwood Avenue
• Chennells
• Cherry Way
• Cheviots
• Chilterns
• Chipmunk Chase
• Clarke's Road
• Clarkson Court
• Cloverland
• Clover Way
• Cobmead
• Cobnut Close
• College Lane
• Comet Road

Check an address in AL10

Check an address in AL10

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=AL10" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about AL10

What does an AL10 postcode tell you?

That the address lies in the AL10 district of the AL (St Albans) postcode area, and the place OS Open Names most often lists first for its postcodes is Hatfield. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 786 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 AL10

• AL93.0 km
• AL44.5 km
• AL85.0 km
• AL75.1 km
• AL16.4 km
• EN67.8 km
• AL68.3 km
• AL28.5 km
• WD79.7 km
• AL310.2 km
• AL510.3 km
• SG1410.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids