HP23 postcode district

Postcodes and sectors

576 of the district's 948 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 51.79574, -0.66149, which locates the district, not a building.

Companies registered in HP23

Companies House lists 2,153 companies with a registered office in HP23; 458 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 HP23

• Dacorum
• Hertfordshire
• Eastern
• Tring
• Buckinghamshire
• South East
• Wigginton
• Marsworth
• Wilstone
• Aldbury
• Long Marston
• Buckland Common
• Hastoe
• Cholesbury
• Puttenham
• Cow Roast
• West Leith
• St Leonards
• Astrope
• Bulbourne
• Tringford
• Gubblecote
• Little Tring
• Wilstone Green

Roads filed under HP23

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.

• Abstacle Hill
• Acacia Walk
• Adams Way
• Akeman Street
• Albert Street
• Alnwick Drive
• Anns Close
• Ardwick Close
• Ash Road
• Astley Place
• Astrope Lane
• Aylesbury Road
• Barbers Walk
• Barton Close
• Beacon Road
• Beaconsfield Road
• Beacon Way
• Beech Grove
• Beech Park Homes
• Beech Walk
• Beechwood Drive
• Beggars Lane
• Belmers Road
• Betty's Lane
• Blaine Close
• Blainways Avenue
• Bottom House Lane
• Bottom Road
• Bridleway
• Broad Highway
• Bromley
• Brookfield Close
• Brook Street
• Broomstick Lane
• Brown's Lane
• Brown's Rise
• Buckingham Road
• Bulbourne Court
• Bulbourne Road
• Bulbourne Yard
• Bunstrux
• Bunyan Close
• Bushel Wharf
• Carman Court
• Carpenters Yard
• Carrington Place
• Chapel End Lane
• Chapel Fields
• Chapel Lane
• Chapel Road
• Chapel Street
• Chappel Meadow
• Charles Street
• Cheddington Lane
• Cherry Tree Lane
• Chesham Road
• Chiltern Hills Close
• Chiltern Way
• Cholesbury Lane
• Cholesbury Road

Check an address in HP23

Check an address in HP23

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=HP23" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about HP23

What does an HP23 postcode tell you?

That the address lies in the HP23 district of the HP (Hemel Hempstead) postcode area, and the place OS Open Names most often lists first for its postcodes is Tring. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 576 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 HP23

• HP47.1 km
• HP227.6 km
• HP59.9 km
• HP2110.0 km
• HP2010.3 km
• HP1611.1 km
• HP1911.9 km
• LU612.4 km
• LU712.5 km
• HP112.7 km
• HP613.7 km
• HP2714.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids