BB1
9 sectors, 1,305 postcodes
Blackburn with Darwen, Hyndburn, Ribble Valley, Rossendale
| Sector | Postcodes | Local authority |
|---|
| BB1 1 | 196 | Blackburn with Darwen |
| BB1 2 | 186 | Blackburn with Darwen |
| BB1 3 | 92 | Blackburn with Darwen |
| BB1 4 | 150 | Hyndburn |
| BB1 5 | 174 | Blackburn with Darwen |
| BB1 6 | 83 | Blackburn with Darwen |
| BB1 7 | 67 | Blackburn with Darwen |
| BB1 8 | 164 | Blackburn with Darwen |
| BB1 9 | 193 | Ribble Valley |