IP1 postcode district

Postcodes and sectors

1,111 of the district's 1,861 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 52.06762, 1.13940, which locates the district, not a building.

Companies registered in IP1

Companies House lists 5,534 companies with a registered office in IP1; 2,747 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 IP1

• Suffolk
• Eastern
• Ipswich
• Mid Suffolk
• Babergh
• Akenham

Roads filed under IP1

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.

• Adair Road
• Agate Close
• Ainslie Road
• Akenham Close
• Aldercroft Close
• Aldercroft Road
• Alderman Road
• All Saints' Road
• Alpe Street
• Alvis Walk
• Amber Close
• Amethyst Close
• Amphora Close
• Anglesea Road
• Anglia Parkway North
• Anglia Parkway South
• Ann Street
• Antrim Road
• Arcade Street
• Arnold Close
• Ashcroft Lane
• Ashcroft Road
• Aston Close
• Avellana Way
• Bakers Crescent
• Ballater Close
• Barley Rise
• Baronsdale Close
• Barrack Lane
• Bayswater Close
• Beaconsfield Road
• Beaufort Street
• Bedford Street
• Beechcroft Road
• Benezet Street
• Bennett Road
• Bentley Road
• Berners Street
• Bibb Way
• Birchcroft Road
• Black Horse Lane
• Black Horse Walk
• Blake Road
• Blenheim Road
• Bodkin Drive
• Boss Hall Road
• Bowthorpe Close
• Brackenbury Close
• Bramford Lane
• Bramford Road
• Bramford Square
• Brett Close
• Bridge Street
• Bridle Way
• Broadmere Road
• Broadway Lane
• Brockley Crescent
• Brookfield Road
• Brooks Hall Road
• Broom Hill Road

Check an address in IP1

Check an address in IP1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=IP1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about IP1

What does an IP1 postcode tell you?

That the address lies in the IP1 district of the IP (Ipswich) postcode area, and the place OS Open Names most often lists first for its postcodes is Ipswich. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,111 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 IP1

• IP22.5 km
• IP42.9 km
• IP84.1 km
• IP34.4 km
• IP57.4 km
• IP67.5 km
• IP98.8 km
• IP1010.5 km
• IP713.4 km
• CO1114.6 km
• IP1216.0 km
• CO1217.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids