SY
26 districts, 14,632 postcodes
Shropshire, Powys, Ceredigion, Cheshire West and Chester, Herefordshire, County of, Wrexham, and others
| District | Postcodes | Local authority |
|---|---|---|
| SY1 | 1,035 | Shropshire |
| SY10 | 835 | Shropshire |
| SY11 | 993 | Shropshire |
| SY12 | 382 | Shropshire |
| SY13 | 880 | Shropshire |
| SY14 | 347 | Cheshire West and Chester |
| SY15 | 255 | Powys |
| SY16 | 690 | Powys |
| SY17 | 178 | Powys |
| SY18 | 226 | Powys |
| SY19 | 55 | Powys |
| SY2 | 579 | Shropshire |
| SY20 | 422 | Powys |
| SY21 | 871 | Powys |
| SY22 | 419 | Powys |
| SY23 | 984 | Ceredigion |
| SY24 | 145 | Ceredigion |
| SY25 | 218 | Ceredigion |
| SY3 | 1,113 | Shropshire |
| SY4 | 1,079 | Shropshire |
| SY5 | 1,069 | Shropshire |
| SY6 | 322 | Shropshire |
| SY7 | 567 | Shropshire |
| SY8 | 823 | Shropshire |
| SY9 | 137 | Shropshire |
| SY99 | 8 | Shropshire |