PO4 postcode district

Postcodes and sectors

740 of the district's 1,009 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 50.79019, -1.06205, which locates the district, not a building.

Companies registered in PO4

Companies House lists 1,546 companies with a registered office in PO4; 100 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 PO4

• Portsmouth
• City of Portsmouth
• South East

Roads filed under PO4

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.

• Adair Road
• Addison Road
• Alhambra Road
• Allen's Road
• Alma Terrace
• Alverstone Road
• Amyas Court
• Andover Road
• Anson Road
• Apsley Road
• Aston Road
• Atalanta Close
• Avocet Close
• Bath Road
• Beatrice Road
• Bembridge Crescent
• Berney Road
• Bertie Road
• Billing Close
• Blendworth Road
• Blenheim Court
• Bonchurch Road
• Brading Avenue
• Bramble Road
• Bramshott Road
• Bransbury Road
• Brasted Court
• Bristol Road
• Brompton Road
• Broom Close
• Broom Square
• Bruce Road
• Burbidge Grove
• Cadnam Road
• Canterbury Road
• Carisbrooke Road
• Carpenter Close
• Catisfield Road
• Centurion Gate
• Chapel View
• Cheriton Road
• Chestnut Avenue
• Chetwynd Road
• Chevening Court
• Chewter Close
• Chitty Road
• Church View
• Claydon Avenue
• Clegg Road
• Clocktower Drive
• Clovelly Road
• Cockleshell Gardens
• Collins Road
• Cousins Grove
• Craneswater Avenue
• Craneswater Gate
• Craneswater Park
• Crinoline Gardens
• Crofton Road
• Cromarty Avenue

Check an address in PO4

Check an address in PO4

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=PO4" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about PO4

What does a PO4 postcode tell you?

That the address lies in the PO4 district of the PO (Portsmouth) postcode area, and the place OS Open Names most often lists first for its postcodes is Portsmouth. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 740 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 PO4

• PO51.7 km
• PO12.2 km
• PO32.9 km
• PO23.3 km
• PO125.7 km
• PO116.1 km
• PO66.3 km
• PO138.7 km
• PO349.0 km
• PO169.6 km
• PO99.8 km
• PO710.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids