Districts in the SR area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| SR1 | Sunderland | Sunderland | 3 | 291 |
| SR2 | Sunderland | Sunderland | 4 | 869 |
| SR3 | Sunderland | Sunderland | 4 | 932 |
| SR4 | Sunderland | Sunderland | 5 | 956 |
| SR5 | Sunderland | Sunderland | 6 | 1,050 |
| SR6 | Sunderland | Sunderland | 4 | 736 |
| SR7 | Seaham | County Durham | 5 | 872 |
| SR8 | Peterlee | County Durham | 6 | 978 |