Sectors in L21
| Sector | Main place | Postcodes |
|---|---|---|
| L21 0 | Litherland | 74 |
| L21 1 | Crosby | 87 |
| L21 2 | Litherland | 26 |
| L21 3 | Crosby | 23 |
| L21 4 | Crosby | 39 |
| L21 5 | Litherland | 38 |
| L21 6 | Litherland | 23 |
| L21 7 | Litherland | 79 |
| L21 8 | Litherland | 91 |
| L21 9 | Litherland | 92 |
Places covered by L21
- Litherland Sefton · 412
- Crosby Sefton · 147
- Bootle Sefton · 12