Districts in the DE area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| DE1 | Derby | Derby | 5 | 706 |
| DE3 | Derby | Derby | 2 | 463 |
| DE4 | Matlock | Derbyshire Dales | 5 | 1,023 |
| DE5 | Ripley | Amber Valley | 4 | 537 |
| DE6 | Ashbourne | Derbyshire Dales | 6 | 792 |
| DE7 | Ilkeston | Erewash | 6 | 1,147 |
| DE11 | Swadlincote | South Derbyshire | 5 | 1,083 |
| DE12 | Measham | North West Leicestershire | 3 | 568 |
| DE13 | Burton upon Trent | East Staffordshire | 4 | 991 |
| DE14 | Burton upon Trent | East Staffordshire | 4 | 797 |
| DE15 | Burton upon Trent | East Staffordshire | 2 | 547 |
| DE21 | Derby | Derby | 5 | 1,261 |
| DE22 | Derby | Derby | 5 | 1,087 |
| DE23 | Derby | Derby | 6 | 1,089 |
| DE24 | Derby | Derby | 6 | 1,191 |
| DE45 | Bakewell | Derbyshire Dales | 2 | 313 |
| DE55 | Alfreton | Amber Valley | 8 | 1,243 |
| DE56 | Belper | Amber Valley | 5 | 915 |
| DE65 | Hilton | South Derbyshire | 3 | 555 |
| DE72 | Borrowash | Erewash | 2 | 452 |
| DE73 | Derby | South Derbyshire | 4 | 536 |
| DE74 | Castle Donington | North West Leicestershire | 2 | 341 |
| DE75 | Heanor | Amber Valley | 2 | 346 |
| DE99 | Derby | Derby | 1 | 1 |
Main places in the DE area
- Derby
- Burton upon Trent
- Ilkeston
- Swadlincote
- Ripley
- Belper
- Heanor
- Matlock
- Ashbourne
- Alfreton
- South Normanton
- Woodville
- Castle Donington
- Somercotes
- Hilton
- Bakewell
- Measham
- Melbourne
- Swanwick
- Darley Dale
- Duffield
- Borrowash
- Wirksworth
- Kegworth
- Moira
- West Hallam
- Barton-under-Needwood
- Breaston
- Stretton
- Tibshelf