What does a IP13 postcode tell you?

That the address lies in the IP13 district of the IP (Ipswich) postcode area, which the directory places around Suffolk. 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.

IP13 postcode district

What the public directories installed here say about the IP13 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	IP (Ipswich)
live postcodes	1,183
terminated postcodes	123
streets listed	404
centroid	52.18974, 1.32068
counted on	2026-09-18

Places the directory lists for IP13

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 IP area is reported but not scored.

Suffolk
Eastern
East Suffolk
Mid Suffolk
Framlingham
Wickham Market
Grundisburgh
Laxfield
Ufford
Bredfield
Worlingworth
Campsea Ashe
Little Bealings
Badingham
Marlesford
Pettistree
Kettleburgh
Earl Soham
Hacheston
Brandeston
Saxtead Green
Charsfield
Easton
Parham

Postcodes in use

1,183 postcodes in IP13 were in use on the day of the count. A postcode directory says whether a code is in use, never who is there. 123 of its 1,306 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: 52.18974, 1.32068 — the mean of the live postcodes' centroids, which locates the district, not any building in it.

Streets filed under IP13

OS Open Names files 404 roads under IP13. 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.

A1120
Abbey Gardens
Ablitts Meadow
Albert Place
Albert Road
Alice Driver Road
Andrew Burtt's Close
Ash Road
Ashwell Avenue
B1078
B1079
B1116
B1119
B1120
B1438
Badingham Road
Baines Way
Bannocks Lane
Barhams Way
Barrack Lane

the first 20 of 404, alphabetically

Check an address in IP13

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 IP13

curl https://spaw.co/api/v1/address \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"address": "10 Downing Street, London IP13 …", "country": "GB"}'

Common questions about IP13

What does a IP13 postcode tell you?: That the address lies in the IP13 district of the IP (Ipswich) postcode area, which the directory places around Suffolk. 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 IP

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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