BB - Blackburn 5 Digit postcode sector map
| Postcode | Post town | Postcode | Post town | ||||
| BB0 | BLACKBURN | BB8 | COLNE | ||||
| BB1 | BLACKBURN | BB9 | NELSON | ||||
| BB2 | BLACKBURN | BB10 | BURNLEY | ||||
| BB3 | DARWEN | BB11 | BURNLEY | ||||
| BB4 | ROSSENDALE | BB12 | BURNLEY | ||||
| BB5 | ACCRINGTON | BB18 | BARNOLDSWICK | ||||
| BB6 | BLACKBURN | BB18 | BARNOLDSWICK | ||||
| BB7 | CLITHEROE |
CA Carlisle
LA Lancaster
BD Bradford
BB Blackburn
PR Preston
FY Blackpool
L Liverpool
WN Wigan
BL Bolton
OL Oldham
HX Halifax
HD Hudersfield
SK Stockport
M Manchester
CH Chester
CW Crewe
WA Warrington