BN
37 districts, 22,497 postcodes
Brighton and Hove, Lewes, Worthing, Eastbourne, Arun, Wealden, and others
| District | Postcodes | Local authority |
|---|---|---|
| BN1 | 1,579 | Brighton and Hove |
| BN10 | 537 | Lewes |
| BN11 | 1,096 | Worthing |
| BN12 | 688 | Worthing |
| BN13 | 772 | Worthing |
| BN14 | 750 | Worthing |
| BN15 | 744 | Adur |
| BN16 | 1,021 | Arun |
| BN17 | 767 | Arun |
| BN18 | 586 | Arun |
| BN2 | 1,609 | Brighton and Hove |
| BN20 | 728 | Eastbourne |
| BN21 | 932 | Eastbourne |
| BN22 | 828 | Eastbourne |
| BN23 | 688 | Eastbourne |
| BN24 | 384 | Wealden |
| BN25 | 884 | Lewes |
| BN26 | 524 | Wealden |
| BN27 | 1,136 | Wealden |
| BN3 | 1,445 | Brighton and Hove |
| BN41 | 400 | Brighton and Hove |
| BN42 | 219 | Adur |
| BN43 | 529 | Adur |
| BN44 | 263 | Horsham |
| BN45 | 42 | Mid Sussex |
| BN5 | 287 | Horsham |
| BN50 | 63 | Brighton and Hove |
| BN51 | 9 | Brighton and Hove |
| BN52 | 60 | Brighton and Hove |
| BN6 | 622 | Mid Sussex |
| BN7 | 748 | Lewes |
| BN8 | 693 | Lewes |
| BN88 | 8 | Brighton and Hove |
| BN9 | 417 | Lewes |
| BN91 | 1 | — |
| BN95 | 1 | Adur |
| BN99 | 437 | Adur |