IP21 postcode district

Postcodes and sectors

530 of the district's 588 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 52.36447, 1.23704, which locates the district, not a building.

Companies registered in IP21

Companies House lists 522 companies with a registered office in IP21; none of them at an address 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 IP21

• Eastern
• Mid Suffolk
• Suffolk
• South Norfolk
• Norfolk
• Stradbroke
• Fressingfield
• Pulham Market
• Scole
• Pulham St Mary
• Dickleburgh
• Brockdish
• Waterloo
• Hoxne
• Heckfield Green
• Oakley
• Stuston
• Cross Street
• Weybread Street
• Rushall
• Horham
• Weybread
• Thorpe Abbotts
• Shimpling

Roads filed under IP21

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 Hill
• Ablett Close
• Airstation Lane
• Alexander Way
• Ash Plough
• Ash Tree Close
• Athelington Road
• Back Lane
• Back Road
• Bank Street
• Barnes' Road
• Battlesea Green Close
• Battlesea Hill
• Beck Close
• Beech Close
• Beech Way
• Bishops Way
• Bond Close
• Brandreth Close
• Bridge Road
• Broad Way
• Brome Hall Lane
• Buckingham's Hill
• Bullock Hill
• Bungay Road
• Burnthouse Lane
• Burston Road
• Bush Green
• Carpenters Yard
• Castell Close
• Catchpole Walk
• Causeway Close
• Cedar Close
• Chantala Close
• Chapel Close
• Chapel Lane
• Chestnut Road
• Chickering Road
• Church Close
• Church Farm Close
• Church Hill
• Church Lane
• Church Road
• Church Road North
• Church Street
• Clements Close
• Colegate End
• Colegate End Road
• Cole Street
• Comber Close
• Common Lane
• Common Road
• Cooper Gardens
• Copperfield Court
• Cornfields
• Crabtree Rise
• Cratfield Road
• Cross Street
• Crown Close
• Cutting's Road

Check an address in IP21

Check an address in IP21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=IP21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about IP21

What does an IP21 postcode tell you?

That the address lies in the IP21 district of the IP (Ipswich) postcode area, and the place OS Open Names most often lists first for its postcodes is Mid Suffolk. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 530 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 IP21

• IP207.2 km
• IP2310.1 km
• IP2212.7 km
• NR1515.6 km
• NR3517.1 km
• NR1617.4 km
• IP1917.7 km
• IP1320.2 km
• IP1422.5 km
• IP1723.4 km
• NR1723.5 km
• NR1424.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids