| L1B 1C1 information | |
|---|---|
| Streets | 7 |
| Province | Ontario |
| Postal District | L |
| Forward sortation areas(FSA) | L1B |
| Local delivery units(LDU) | 1C1 |
| Name | Place | County | Postal Code |
|---|---|---|---|
| Baldwin Street | Newcastle | Durham | L1B 1C1 |
| Baldwin Street | Newcastle | Durham | L1B 1C1 |
| Catherwood Lane | Newcastle | Durham | L1B 1C1 |
| Catherwood Lane | Newcastle | Durham | L1B 1C1 |
| Clarke Street | Newcastle | Durham | L1B 1C1 |
| Clarke Street | Newcastle | Durham | L1B 1C1 |
| Mill Street South | Newcastle | Durham | L1B 1C1 |