County Durham has been allocated the following number ranges to use for Unique Street Reference Numbers
| USRN From | USRN To |
|---|---|
| 11000000 | 11099999 |
| 11600000 | 11699999 |
| 11700000 | 11799999 |
| 11900000 | 11999999 |
| 33900000 | 33999999 |
| 39700000 | 39799999 |
| 42800000 | 42899999 |
| 7000000 | 7099999 |
| 81200000 | 81299999 |
Streets within the area of County Durham fall within the following post towns.
Click a town to expand the list of streets. Click again to close. Use the Search Box to filter the list.