Districts in the SN area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| SN1 | Swindon | Swindon | 6 | 797 |
| SN2 | Swindon | Swindon | 6 | 956 |
| SN3 | Swindon | Swindon | 8 | 1,310 |
| SN4 | Royal Wootton Bassett | Wiltshire | 5 | 916 |
| SN5 | Swindon | Swindon | 8 | 898 |
| SN6 | Highworth | Swindon | 3 | 681 |
| SN7 | Faringdon | Vale of White Horse | 3 | 564 |
| SN8 | Marlborough | Wiltshire | 5 | 940 |
| SN9 | Pewsey | Wiltshire | 2 | 323 |
| SN10 | Devizes | Wiltshire | 6 | 1,204 |
| SN11 | Calne | Wiltshire | 4 | 774 |
| SN12 | Melksham | Wiltshire | 4 | 823 |
| SN13 | Corsham | Wiltshire | 3 | 666 |
| SN14 | Chippenham | Wiltshire | 4 | 974 |
| SN15 | Chippenham | Wiltshire | 6 | 1,316 |
| SN16 | Malmesbury | Wiltshire | 3 | 530 |
| SN25 | Swindon | Swindon | 6 | 821 |
| SN26 | Broad Blunsdon | Swindon | 2 | 74 |
| SN38 | Swindon | Swindon | 10 | 124 |
| SN99 | Swindon | Swindon | 1 | 18 |
Main places in the SN area
- Swindon
- Chippenham
- Devizes
- Calne
- Stratton St Margaret
- Melksham
- Royal Wootton Bassett
- Corsham
- Marlborough
- Faringdon
- Malmesbury
- Wroughton
- Highworth
- Pewsey
- Cricklade
- Bowerhill
- Shrivenham
- Purton
- Box
- Lyneham
- Wanborough
- Blunsdon St Andrew
- Stanford in the Vale
- Broad Blunsdon
- Neston
- Watchfield
- Chiseldon
- Market Lavington
- Rowde
- Bromham