HA6 postcode district

Postcodes and sectors

721 of the district's 1,122 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 51.61192, -0.42250, which locates the district, not a building.

Companies registered in HA6

Companies House lists 4,401 companies with a registered office in HA6; 1,135 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 HA6

• London
• Hillingdon
• Greater London
• Three Rivers
• Hertfordshire
• Eastern
• Ruislip
• Eastbury
• Moor Park
• Northwood

Roads filed under HA6

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.

• Acre Way
• Addison Close
• Addison Way
• Adhara Road
• Altair Way
• Anson Walk
• Anthus Mews
• Ardross Avenue
• Ashbourne Square
• Ashurst Close
• Askew Road
• Astons Road
• Athena Place
• Atria Road
• Avior Drive
• Barker Close
• Batchworth Lane
• Bayhurst Drive
• Bedford Road
• Bennett Close
• Bishops Avenue
• Blackbird Lane
• Bourne End Road
• Brackenhill Close
• Briarwood Drive
• Brookdene Drive
• Buttsmead
• Canopus Way
• Canterbury Close
• Capella Road
• Carew Road
• Central Way
• Cervantes Court
• Chartwell Road
• Chelwood Close
• Chester Road
• Chestnut Avenue
• Church Close
• Church Road
• Clare Court
• Closemead Close
• Colchester Road
• College Way
• Columbus Gardens
• Copse Close
• Copse Wood Way
• Cranbourne Road
• Crofters Road
• Cullera Close
• Cygnet Close
• Davenham Avenue
• Dene Road
• Denewood Place
• Dormans Close
• Drakes Drive
• Drysdale Close
• Duck's Hill Road
• Eastbury Avenue
• Eastbury Farm Close
• Eastbury Road

Check an address in HA6

Check an address in HA6

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=HA6" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about HA6

What does an HA6 postcode tell you?

That the address lies in the HA6 district of the HA (Harrow) postcode area, and the place OS Open Names most often lists first for its postcodes is London. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 721 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 HA6

• WD193.0 km
• HA53.1 km
• WD184.2 km
• HA44.7 km
• UB95.6 km
• WD35.7 km
• WD235.8 km
• WD175.9 km
• HA26.0 km
• HA16.8 km
• WD247.1 km
• UB107.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids