Sectors in DH3
| Sector | Main place | Postcodes |
|---|---|---|
| DH3 1 | Birtley | 198 |
| DH3 2 | Birtley | 172 |
| DH3 3 | Chester-le-Street | 213 |
| DH3 4 | Great Lumley | 179 |
| DH3 9 | Chester-le-Street | 8 |
Places covered by DH3
- Birtley Gateshead · 350
- Chester-le-Street County Durham · 277
- Great Lumley County Durham · 86
- Bournmoor County Durham · 5
- Castle Dene County Durham · 4