PO1 postcode district

Postcodes and sectors

911 of the district's 1,655 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 50.79946, -1.08966, which locates the district, not a building.

Companies registered in PO1

Companies House lists 2,031 companies with a registered office in PO1; 403 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 PO1

• Portsmouth
• City of Portsmouth
• South East

Roads filed under PO1

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.

• Adames Road
• Admiral's Walk
• Admiralty Road
• Aldrich Road
• Alec Rose Lane
• Alexandra Road
• Alfred Road
• All Saint's Road
• All Saints' Street
• All Saints Road
• Alver Road
• Anchor Gate Road
• Anchor Lane
• Andrew Bell Street
• Anglesea Road
• April Square
• Ariel Road
• Armory Lane
• Arundel Street
• Australia Close
• Avondale Road
• Aylward Street
• Baker Street
• Barnes Road
• Bathing Lane
• Bath Square
• Battery Row
• Beck Street
• Beecham Road
• Beehive Walk
• Belmore Close
• Benbow Place
• Beneficial Street
• Berkshire Close
• Bettesworth Road
• Bill Sargent Crescent
• Bishop Crispian Way
• Bishop Street
• Blake Road
• Blossom Square
• Blount Road
• Boarhunt Close
• Boiler Road
• Bonfire Corner
• Bridgeside Close
• Bridport Street
• Britain Street
• Broad Street
• Brookfield Road
• Brownlow Close
• Buckingham Place
• Buckingham Street
• Buriton Street
• Burleigh Road
• Burnaby Road
• Butcher Street
• Byerley Road
• Caen Marchè
• Camber Place
• Cambridge Road

Check an address in PO1

Check an address in PO1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=PO1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about PO1

What does a PO1 postcode tell you?

That the address lies in the PO1 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 911 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 PO1

• PO51.2 km
• PO42.2 km
• PO22.2 km
• PO32.8 km
• PO123.7 km
• PO65.4 km
• PO136.6 km
• PO167.5 km
• PO118.0 km
• PO349.4 km
• PO79.9 km
• PO1410.1 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids