PO21 postcode district

Postcodes and sectors

1,352 of the district's 1,839 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 50.78519, -0.69955, which locates the district, not a building.

Companies registered in PO21

Companies House lists 1,966 companies with a registered office in PO21; 674 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 PO21

• Arun
• West Sussex
• South East
• Bognor Regis
• Pagham
• Elbridge

Roads filed under PO21

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.

• A'becket's Avenue
• Abbottsbury
• Acorn End
• Adlington Gardens
• Aigburth Avenue
• Albert Road
• Alborough Way
• Aldbourne Drive
• Alding Crescent
• Aldwick Avenue
• Aldwick Felds
• Aldwick Gardens
• Aldwick Hundred
• Aldwick Place
• Aldwick Road
• Aldwick Street
• Alexander Close
• Alperton Close
• Amberley Drive
• Annandale Avenue
• Anson Road
• Applegate Way
• Apple Grove
• Arable Close
• Argyle Circus
• Argyle Road
• Arnhem Road
• Arundel Close
• Arun Road
• Arun Way
• Ashbee Gardens
• Ashcroft Way
• Ashurst Close
• Avian Gardens
• Babsham Lane
• Bakery Lane
• Baler Grove
• Balliol Close
• Balmoral Close
• Barley Close
• Barons Mead
• Barrack Lane
• Barton Close
• Bassett Road
• Bay Walk
• Beach Close
• Beach Road
• Beatty Road
• Bedenscroft
• Bedford Avenue
• Bedford Street
• Beech Close
• Bell Court
• Belmont Street
• Berryfields
• Berrymill Close
• Birch Close
• Birdham Close
• Bishops Close
• Blakemyle

Check an address in PO21

Check an address in PO21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=PO21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about PO21

What does a PO21 postcode tell you?

That the address lies in the PO21 district of the PO (Portsmouth) postcode area, and the place OS Open Names most often lists first for its postcodes is Bognor Regis. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,352 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 PO21

• PO224.0 km
• PO205.8 km
• PO198.1 km
• BN1810.2 km
• BN1711.7 km
• PO1812.0 km
• BN1614.8 km
• PO1017.7 km
• BN1219.3 km
• PO1119.4 km
• BN1320.9 km
• PO921.8 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids