What does a NP26 postcode tell you?

That the address lies in the NP26 district of the NP (Newport) postcode area, which the directory places around Wales. The inward half of the full postcode narrows it to a street or a building; the district alone does not, and an address written with a district and no inward half cannot be checked against the register.

Does a street listed here mean an address on it exists?

It means OS Open Names lists a road of that name under the district, which is what the address lookup answers as a street-level match. It says nothing about any building on it: Great Britain publishes no open register of buildings, so the lookup answers exists: null there and confirms the street alone.

Who lives at these postcodes?

Nobody on this page. A postcode directory says whether a code is in use, never who is there, and a streets register lists roads, not occupants. The address lookup carries no field about a person and never will.

NP26 postcode district

What the public directories installed here say about the NP26 postcode district: how many of its postcodes are in use, the places OS Open Names lists for them, the streets it files under the district and the district's centroid. Counted from the national postcode directory and OS Open Names on 2026-09-18, and never about who is at an address.

postcode area	NP (Newport)
live postcodes	635
terminated postcodes	178
streets listed	487
centroid	51.59109, -2.77922
counted on	2026-09-18

Places the directory lists for NP26

OS Open Names places the district's postcodes in these settlements, boroughs, counties and regions, most often first. A town written as any of them matches the directory in an address lookup, and one written as another place in the NP area is reported but not scored.

Wales
Sir Fynwy
Monmouthshire
Cil-y-coed
Caldicot
Gwndy
Undy
Magor
Magwyr
Rogiet
Casnewydd
Newport
Portskewett
Porthsgiwed
Caer-went
Caerwent
Sudbrook
Parc-Seymour
Llanvaches
Redwick
Crick
Leechpool
Penhow
Whitewall Common

Postcodes in use

635 postcodes in NP26 were in use on the day of the count. A postcode directory says whether a code is in use, never who is there. 178 of its 813 postcodes have been terminated: a real address written with one has moved on, which is not the same thing as a typo, and the address lookup scores it rather than refusing it.

Centroid: 51.59109, -2.77922 — the mean of the live postcodes' centroids, which locates the district, not any building in it.

Streets filed under NP26

OS Open Names files 487 roads under NP26. 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.

Acacia Avenue
Albion Way
Alianore Road
Angiddy Close
Apple Avenue
Arlington Close
Arthurs Court
Ash Grove
Ash Tree Road
Avon Close
B4245
Badgers Walk
Bareland Street
Barn Owl Road
Barons Court
Beech Road
Bencroft Lane
Betjeman Avenue
Bicentennial Avenue
Birbeck Road

the first 20 of 487, alphabetically

Check an address in NP26

The address checker opens on Great Britain with the district in the field: add the street, the number and the full postcode, and it answers the postcode's status, whether the street is filed under the district, and what kind of delivery point the address names.

Check an address in NP26

curl https://spaw.co/api/v1/address \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"address": "10 Downing Street, London NP26 …", "country": "GB"}'

Common questions about NP26

What does a NP26 postcode tell you?: That the address lies in the NP26 district of the NP (Newport) postcode area, which the directory places around Wales. The inward half of the full postcode narrows it to a street or a building; the district alone does not, and an address written with a district and no inward half cannot be checked against the register.
Does a street listed here mean an address on it exists?: It means OS Open Names lists a road of that name under the district, which is what the address lookup answers as a street-level match. It says nothing about any building on it: Great Britain publishes no open register of buildings, so the lookup answers exists: null there and confirms the street alone.
Who lives at these postcodes?: Nobody on this page. A postcode directory says whether a code is in use, never who is there, and a streets register lists roads, not occupants. The address lookup carries no field about a person and never will.

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.

Data synced on 2026-09-18: the newest register or postcode directory copy installed here.

Other districts in NP

Wrong result, or is it about you? If this tool said something you think is wrong, tell us and a person reads it. If Spaw is holding data about you and you never signed up here — a customer may have had your address verified, or reported that a message to it bounced — erase it yourself, confirmed by mail to that address and with no account needed.

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