Hertsmere District (B) has been allocated the following number ranges to use for Unique Street Reference Numbers
| USRN From | USRN To |
|---|---|
| 17200000 | 17299999 |
Streets within the area of Hertsmere District (B) 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.