Sectors in LL21
| Sector | Main place | Postcodes |
|---|---|---|
| LL21 0 | Corwen | 171 |
| LL21 9 | Cerrigydrudion | 197 |
Places covered by LL21
- Corwen Denbighshire · 50
- Cynwyd Denbighshire · 23
- Llandrillo Denbighshire · 21
- Cerrigydrudion Conwy · 20
- Clawdd Poncen Denbighshire · 16
- Carrog Denbighshire · 14
- Bryneglwys Denbighshire · 13
- Gwyddelwern Denbighshire · 13
- Glyndyfrdwy Denbighshire · 11
- Bettws Gwerfil Goch Denbighshire · 6
- Llangwm Conwy · 5
- Llidiart-y-Parc Denbighshire · 5
- Maerdy Conwy · 4
- Cefn-brith Conwy · 3
- Derwen Denbighshire · 3
- Druid Denbighshire · 3
- Bonwm Denbighshire · 2
- Bryn Saith Marchog Denbighshire · 2
- Dinmael Conwy · 2
- Glan-yr-afon Gwynedd · 2
- Glasfryn Conwy · 2
- Llanfihangel Glyn Myfyr Conwy · 2
- Melin-y-Wig Denbighshire · 2
- Ty-nant Conwy · 2
- Fedw Denbighshire · 1
- Four Crosses Denbighshire · 1
- Pentre Denbighshire · 1
- Ty'n-y-cefn Denbighshire · 1
- Wenallt Gwynedd · 1