NP12 postcode district

Postcodes and sectors

904 of the district's 1,049 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 51.66912, -3.19798, which locates the district, not a building.

Companies registered in NP12

Companies House lists 1,238 companies with a registered office in NP12; none of them at an address 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 NP12

• Caerffili
• Caerphilly
• Wales
• Y Coed Duon
• Blackwood
• Pontllanfraith
• Oakdale
• Pengam
• Fleur-de-lis
• Markham
• Argoed
• Hollybush
• Aberbargoed
• Aberbargod
• Glan-y-nant
• Wyllie
• Rock
• Manmoel
• Cwm-corrwg
• Bedwellty
• Bedwellte
• Gwrhay

Roads filed under NP12

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.

• Aberconway Place
• Abernant Crescent
• Abernant Road
• Addison Street
• Albany Road
• Albion Terrace
• Alderman Close
• Alder Rise
• Aneurin Avenue
• Apollo Way
• Arvonia Terrace
• Ashgrove
• Ashville
• Ashwood Close
• Aspen Avenue
• Attlee Road
• Auckland Close
• Avon Close
• Banalog Terrace
• Beatty Street
• Beaumaris Way
• Bedwellty Road
• Beech Avenue
• Beechcroft
• Beech Grove
• Beili Glas Road
• Berllanlwyd Avenue
• Bevan Crescent
• Birchwood Close
• Blacksmith Close
• Blackwood Road
• Bloomfield Road
• Bont Close
• Borfa Place
• Bramblewood Court
• Bridge Street
• Britannia Terrace
• Britannia Walk
• Broadmead
• Bronwydd
• Brook Field
• Brookfield Road
• Brook Lane
• Brook Rise
• Bryn-Rhedyn
• Bryn Brithdir
• Bryn Crescent
• Bryn Derw
• Brynglas Avenue
• Bryngoleu Street
• Bryngoleu Terrace
• Bryngwyn Street
• Brynhyfryd Street
• Bryn Lane
• Bryn Road
• Bryn Road North Lane
• Brynteg Avenue
• Burnet Drive
• Cae'r Delyn
• Cae'r Garreg

Check an address in NP12

Check an address in NP12

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=NP12" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about NP12

What does an NP12 postcode tell you?

That the address lies in the NP12 district of the NP (Newport) postcode area, and the place OS Open Names most often lists first for its postcodes is Y Coed Duon. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 904 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 NP12

• CF823.4 km
• CF814.9 km
• NP115.4 km
• NP246.2 km
• CF467.1 km
• NP138.3 km
• CF839.3 km
• CF4511.3 km
• NP411.8 km
• NP4411.9 km
• CF3711.9 km
• NP2212.1 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids