What does a PA18 postcode tell you?

That the address lies in the PA18 district of the PA (Paisley) postcode area, which the directory places around Inverclyde. 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.

PA18 postcode district

What the public directories installed here say about the PA18 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	PA (Paisley)
live postcodes	63
terminated postcodes	9
streets listed	48
centroid	55.88754, -4.89046
counted on	2026-09-18

Places the directory lists for PA18

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 PA area is reported but not scored.

Inverclyde
Scotland
Wemyss Bay

Postcodes in use

63 postcodes in PA18 were in use on the day of the count. A postcode directory says whether a code is in use, never who is there. 9 of its 72 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: 55.88754, -4.89046 — the mean of the live postcodes' centroids, which locates the district, not any building in it.

Streets filed under PA18

OS Open Names files 48 roads under PA18. 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.

Ardgowan Road
Ascog Place
Beech Walk
Broom Road
Brueacre Drive
Brueacre Place
Brueacre Road
Burns Drive
Carron Road
Castle Road
Castle Wemyss Drive
Castle Wemyss Place
Cedar Walk
Cliff Terrace Road
Elm Walk
Etive Road
Fir Avenue
Forbes Place
Hawthorn Way
Hazel Walk

the first 20 of 48, alphabetically

Check an address in PA18

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 PA18

curl https://spaw.co/api/v1/address \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"address": "10 Downing Street, London PA18 …", "country": "GB"}'

Common questions about PA18

What does a PA18 postcode tell you?: That the address lies in the PA18 district of the PA (Paisley) postcode area, which the directory places around Inverclyde. 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 PA

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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