All postcodes in L21 3
| Postcode | Place | Type |
|---|---|---|
| L21 3AB | Crosby | street |
| L21 3AD | Crosby | street |
| L21 3TA | Crosby | street |
| L21 3TB | Crosby | street |
| L21 3TD | Crosby | street |
| L21 3TE | Crosby | street |
| L21 3TF | Crosby | street |
| L21 3TG | Crosby | street |
| L21 3TJ | Crosby | street |
| L21 3TL | Crosby | street |
| L21 3TN | Crosby | street |
| L21 3TP | Crosby | street |
| L21 3TQ | Litherland | street |
| L21 3TR | Crosby | street |
| L21 3TS | Crosby | street |
| L21 3TT | Crosby | street |
| L21 3TW | Crosby | street |
| L21 3TX | Crosby | street |
| L21 3TY | Crosby | street |
| L21 3TZ | Crosby | street |
| L21 3UA | Crosby | street |
| L21 3UB | Crosby | street |
| L21 3UD | Crosby | street |
Places in sector L21 3
- Crosby 22
- Litherland 1