What does a PO6 postcode tell you?

That the address lies in the PO6 district of the PO (Portsmouth) postcode area, which the directory places around South East. 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.

PO6 postcode district

What the public directories installed here say about the PO6 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	PO (Portsmouth)
live postcodes	917
terminated postcodes	357
streets listed	440
centroid	50.84657, -1.06985
counted on	2026-09-18

Places the directory lists for PO6

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 PO area is reported but not scored.

South East
City of Portsmouth
Portsmouth
Purbrook
Havant
Hampshire

Postcodes in use

917 postcodes in PO6 were in use on the day of the count. A postcode directory says whether a code is in use, never who is there. 357 of its 1,274 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: 50.84657, -1.06985 — the mean of the live postcodes' centroids, which locates the district, not any building in it.

Streets filed under PO6

OS Open Names files 440 roads under PO6. 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.

A27
A397
Abbeydore Road
Aberdare Avenue
Acorn Close
Aerial Road
Ainsdale Road
Albert Road
Aldroke Street
Aldsworth Close
Aldsworth Gardens
Aldworth Path
Allaway Avenue
Almondsbury Road
Arran Close
Artillery Close
Ashford Close
Ashley Walk
Ashurst Road
Augustine Road

the first 20 of 440, alphabetically

Check an address in PO6

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 PO6

curl https://spaw.co/api/v1/address \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"address": "10 Downing Street, London PO6 …", "country": "GB"}'

Common questions about PO6

What does a PO6 postcode tell you?: That the address lies in the PO6 district of the PO (Portsmouth) postcode area, which the directory places around South East. 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 PO

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