CB postcode area
The CB area holds 16 districts and 11,252 live postcodes; its largest place is Cambridge.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| CB1 | 1,159 | — |
| CB2 | 588 | Cambridge |
| CB3 | 418 | Girton |
| CB4 | 903 | — |
| CB5 | 279 | — |
| CB6 | 923 | Littleport |
| CB7 | 752 | Ely |
| CB8 | 1,074 | Newmarket |
| CB9 | 843 | Haverhill |
| CB10 | 577 | Saffron Walden |
| CB11 | 550 | Newport |
| CB21 | 446 | Linton |
| CB22 | 611 | Sawston |
| CB23 | 883 | Cambourne |
| CB24 | 818 | Histon |
| CB25 | 428 | Burwell |
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.