CB3 postcode district

Postcodes and sectors

418 of the district's 1,509 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 52.21375, 0.09796, which locates the district, not a building.

Companies registered in CB3

Companies House lists 2,081 companies with a registered office in CB3; 1,061 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 CB3

• Cambridgeshire
• Eastern
• Cambridge
• South Cambridgeshire
• Girton
• Grantchester

Roads filed under CB3

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.

• Adams Road
• Albion Row
• Albion Yard
• All Souls Lane
• Andersons Court
• Appleton Way
• Archway Court
• Aston Terrace
• Ayrton Avenue
• Balfour Lane
• Bandon Road
• Barton Close
• Barton Road
• Beagle Road
• Bearsden Avenue
• Benians Court
• Bridle Way
• Broadway
• Buckingham Road
• Bullman Grove
• Bulstrode Gardens
• Bunker's Hill
• Burkitt Lane
• Burkitt Walk
• Burlton Road
• Burnt Close
• Burrell's Walk
• Cambridge Road
• Castle Park
• Castle Row
• Castle Street
• Causewayside
• Champneys Walk
• Charles Babbage Road
• Chedworth Street
• Cherry Bounds Road
• Churchfield Court
• Churchill Road
• Church Lane
• Church Rate Walk
• Clare Road
• Clarkson Close
• Clarkson Road
• Clerk Maxwell Road
• Cloisters Court
• Cockcroft Place
• Cockerton Road
• Conduit Head Road
• Cornford Drive
• Coton Road
• Covington Way
• Cranmer Road
• Crick Road
• Crome Ditch Close
• Dane Drive
• Derby Street
• Dobb Way
• Dodford Lane
• Down House Drive
• Driftway

Check an address in CB3

Check an address in CB3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=CB3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about CB3

What does a CB3 postcode tell you?

That the address lies in the CB3 district of the CB (Cambridge) postcode area, and the place OS Open Names most often lists first for its postcodes is Cambridge. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 418 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 CB3

• CB42.4 km
• CB23.6 km
• CB13.6 km
• CB54.0 km
• CB247.4 km
• CB239.0 km
• CB229.7 km
• CB2511.9 km
• CB2115.7 km
• PE2717.4 km
• SG818.3 km
• CB722.5 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids