Sectors in DN21
| Sector | Main place | Postcodes |
|---|---|---|
| DN21 1 | Gainsborough | 372 |
| DN21 2 | Gainsborough | 212 |
| DN21 3 | Scotter | 268 |
| DN21 4 | Kirton in Lindsey | 243 |
| DN21 5 | Lea | 266 |
| DN21 9 | Gainsborough | 10 |
Places covered by DN21
- Gainsborough West Lindsey · 636
- Kirton in Lindsey North Lincolnshire · 110
- Scotter West Lindsey · 83
- Blyton West Lindsey · 37
- Lea West Lindsey · 33
- Waddingham West Lindsey · 24
- Hemswell Cliff West Lindsey · 23
- Marton West Lindsey · 23
- Upton West Lindsey · 20
- Willingham by Stow West Lindsey · 17
- Redbourne North Lincolnshire · 16
- Scotton West Lindsey · 16
- Corringham West Lindsey · 14
- Glentworth West Lindsey · 14
- Snitterby West Lindsey · 12
- Willoughton West Lindsey · 12
- Fillingham West Lindsey · 11
- Hemswell West Lindsey · 11
- Kexby West Lindsey · 11
- East Stockwith West Lindsey · 8
- Knaith Park West Lindsey · 7
- Blyborough West Lindsey · 6
- Grayingham West Lindsey · 6
- Laughton West Lindsey · 6
- Northorpe West Lindsey · 5
- Springthorpe West Lindsey · 5
- Gate Burton West Lindsey · 3
- Harpswell West Lindsey · 3
- Knaith West Lindsey · 3
- Wildsworth West Lindsey · 3
- Aisby West Lindsey · 2
- Brandy Wharf West Lindsey · 2
- Heapham West Lindsey · 2
- Pilham West Lindsey · 2
- Scotterthorpe West Lindsey · 2
- Somerby West Lindsey · 2
- East Ferry West Lindsey · 1
- Manton North Lincolnshire · 1
- Normanby by Stow West Lindsey · 1
- Sturgate West Lindsey · 1
- Walkerith West Lindsey · 1
- Yawthorpe West Lindsey · 1