IP11 postcode district

Postcodes and sectors

974 of the district's 1,614 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 51.96809, 1.34090, which locates the district, not a building.

Companies registered in IP11

Companies House lists 1,399 companies with a registered office in IP11; 50 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for IP11

• East Suffolk
• Suffolk
• Eastern
• Felixstowe
• Trimley St Mary
• Trimley St Martin

Roads filed under IP11

Named roads first, then numbered ones. 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. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Abbey Walk
• Adastral Close
• Addington Road
• Albert Walk
• Aldringham Mews
• Alexandra Road
• Allens Drive
• Andrew Close
• Anne Street
• Anzani Avenue
• Arwela Road
• Ascot Drive
• Ash Ground Close
• Ash Tree Close
• Ataka Road
• Avocet Close
• Avocet Mews
• Back Lane
• Bacton Road
• Barnfield
• Barons Close
• Barton Road
• Bath Hill
• Bath Road
• Bawdsey Close
• Beach Road East
• Beach Road West
• Beach Station Road
• Beacon Field
• Beatrice Avenue
• Bent Hill
• Berners Road
• Bishops Close
• Bittern Close
• Black Barns
• Blackthorn Way
• Blofield Road
• Bloomfield Road
• Blue Barn Close
• Bluebell Way
• Blyford Way
• Boxford Court
• Brackley Close
• Brandon Road
• Bredfield Close
• Briar End
• Brick Kiln Close
• Bridge Road
• Brightwell Close
• Brinkley Way
• Brook Lane
• Broom Field
• Brotherton Avenue
• Brownlow Road
• Bryon Avenue
• Buregate Road
• Burnham Close
• Burwood Place
• Butley Road
• Buttercup Crescent

Check an address in IP11

Check an address in IP11

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=IP11" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about IP11

What does an IP11 postcode tell you?

That the address lies in the IP11 district of the IP (Ipswich) postcode area, and the place OS Open Names most often lists first for its postcodes is Felixstowe. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 974 live postcodes.

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.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest IP11

• CO127.3 km
• IP107.4 km
• IP512.2 km
• IP313.3 km
• IP913.5 km
• CO1414.0 km
• IP1214.1 km
• IP415.0 km
• CO1316.0 km
• IP216.6 km
• IP117.7 km
• CO1118.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids