NP18 postcode district

Postcodes and sectors

487 of the district's 585 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 51.60857, -2.94233, which locates the district, not a building.

Companies registered in NP18

Companies House lists 942 companies with a registered office in NP18; 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 NP18

• Wales
• Casnewydd
• Newport
• Caerllion
• Caerleon
• Langstone
• Ponthir
• Torfaen
• Underwood
• Llanwern
• Sir Fynwy
• Monmouthshire
• Llandevaud
• Nash
• Whitson
• Llandegveth
• Broadstreet Common
• Pye Corner
• Bishton
• Llanmartin
• Goldcliff
• Llanddewi Fach
• Coed-y-caerau
• Gatlas

Roads filed under NP18

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.

• Abbot Close
• Abernant Road
• Afon Gardens
• Afon Lwyd Close
• Anthony Drive
• Anwyll Close
• Aqueduct Close
• Arron Close
• Arthur Street
• Ash Grove
• Ashwell
• Augustan Close
• Augustan Drive
• Augustan Way
• Backhall Street
• Badgers Meadow
• Bailey Crescent
• Barnfield
• Bay Tree Close
• Beech Close
• Bellin Close
• Belmont Hill
• Birch Grove
• Bishton Road
• Blackthorn Grove
• Blossom Close
• Blossom Grove
• Boat Road
• Boxtree Close
• Brake Crescent
• Bramble Way
• Bramley Close
• Brechfa Close
• Broad Street Common
• Broadwalk
• Broadway
• Broadwell Court
• Brooklea
• Bulmore Road
• Caerleon Road
• Caerlicken Lane
• Caesar Crescent
• Cae Twmpin Road
• Cambria Close
• Candwr Park
• Candwr Road
• Caradog Close
• Carpenter Close
• Castle Lane
• Castle Street
• Catsash Road
• Centurion Gate
• Chapel Lane
• Chapel Road
• Chepstow Road
• Cherry Tree Close
• Chesnut Grove
• China Basin Lane
• Christchurch Hill
• Church Road

Check an address in NP18

Check an address in NP18

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=NP18" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about NP18

What does an NP18 postcode tell you?

That the address lies in the NP18 district of the NP (Newport) postcode area, and the place OS Open Names most often lists first for its postcodes is Caerllion. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 487 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 NP18

• NP192.7 km
• NP204.9 km
• NP447.6 km
• NP108.0 km
• NP2611.4 km
• NP1113.6 km
• NP1513.6 km
• NP414.3 km
• CF315.2 km
• NP1618.1 km
• CF2318.1 km
• NP1218.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids