NP20 postcode district

Postcodes and sectors

1,354 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 51.59023, -3.00657, which locates the district, not a building.

Companies registered in NP20

Companies House lists 4,173 companies with a registered office in NP20; 989 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 NP20

• Casnewydd
• Newport
• Wales

Roads filed under NP20

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.

• Abberley Hall Road
• Abbots Mews
• Adelaide Street
• Adeline Street
• Agincourt Street
• Ailesbury Street
• Alanbrooke Avenue
• Albany Street
• Albert Street
• Albert Terrace
• Albion Close
• Alder Grove
• Alderney Street
• Alexandra Road
• Alice Street
• Alicia Close
• Alicia Crescent
• Alicia Way
• Allen Close
• Allt-yr-Yn Avenue
• Allt-yr-Yn Close
• Allt-yr-Yn Court
• Allt-yr-Yn Crescent
• Allt-yr-Yn Heights
• Allt-yr-Yn Road
• Allt-yr-Yn View
• Allt-yr-Yn Way
• Alma Street
• Almond Drive
• Anderson Close
• Anderson Place
• Aragon Street
• Argyle Street
• Ariel Close
• Ariel Reach
• Arlington Close
• Arlington Grange Close
• Arnold Close
• Arrow Close
• Arthur Close
• Arthur Street
• Ash Tree View
• Aspen Way
• Aston Crescent
• Aubrey Hames Close
• Auckland Road
• Austin Friars
• Avon Close
• Bacon Place
• Bailey Street
• Baird Close
• Baldwin Close
• Baldwin Street
• Baneswell Courtyard
• Baneswell Road
• Barfleur Crescent
• Barnstaple Court
• Barrack Hill
• Bassaleg Road
• Baydon Manor Court

Check an address in NP20

Check an address in NP20

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=NP20" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about NP20

What does an NP20 postcode tell you?

That the address lies in the NP20 district of the NP (Newport) postcode area, and the place OS Open Names most often lists first for its postcodes is Casnewydd. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,354 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 NP20

• NP193.1 km
• NP103.2 km
• NP184.9 km
• NP447.0 km
• NP1110.5 km
• CF310.6 km
• CF2313.3 km
• NP414.7 km
• CF8314.7 km
• CF2415.6 km
• CF1415.7 km
• NP2615.7 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids