What does a G4 postcode tell you?

That the address lies in the G4 district of the G (Glasgow) postcode area, which the directory places around Glasgow. 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.

G4 postcode district

What the public directories installed here say about the G4 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	G (Glasgow)
live postcodes	341
terminated postcodes	320
streets listed	110
centroid	55.86755, -4.25199
counted on	2026-09-18

Places the directory lists for G4

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 G area is reported but not scored.

Glasgow
Glasgow City
Scotland

Postcodes in use

341 postcodes in G4 were in use on the day of the count. A postcode directory says whether a code is in use, never who is there. 320 of its 661 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: 55.86755, -4.25199 — the mean of the live postcodes' centroids, which locates the district, not any building in it.

Streets filed under G4

OS Open Names files 110 roads under G4. 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.

A804
Bairds Brae
Baird Street
Barrington Drive
Bell Street
Black Street
Borron Street
Braid Square
Braid Street
Burns Street
Burrell's Lane
Calgary Street
Canal Street
Carrington Street
Castle Street
Cathedral Square
Cathedral Street
Civic Street
Collins Street
Corn Street

the first 20 of 110, alphabetically

Check an address in G4

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 G4

curl https://spaw.co/api/v1/address \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"address": "10 Downing Street, London G4 …", "country": "GB"}'

Common questions about G4

What does a G4 postcode tell you?: That the address lies in the G4 district of the G (Glasgow) postcode area, which the directory places around Glasgow. 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 G

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.

More free tools

All free tools

Need this at scale?

The Spaw API runs the same checks plus mailbox-level SMTP verification, batch and bulk endpoints, and list monitoring — 10 free lookups a month, no card required.

Get your API key