LL
67 districts, 20,321 postcodes
Gwynedd, Wrexham, Conwy, Denbighshire, Isle of Anglesey, Flintshire, and others
| District | Postcodes | Local authority |
|---|---|---|
| LL11 | 1,297 | Wrexham |
| LL12 | 889 | Wrexham |
| LL13 | 1,040 | Wrexham |
| LL14 | 1,047 | Wrexham |
| LL15 | 457 | Denbighshire |
| LL16 | 651 | Denbighshire |
| LL17 | 235 | Denbighshire |
| LL18 | 1,225 | Denbighshire |
| LL19 | 605 | Denbighshire |
| LL20 | 384 | Denbighshire |
| LL21 | 368 | Denbighshire |
| LL22 | 652 | Conwy |
| LL23 | 199 | Gwynedd |
| LL24 | 193 | Conwy |
| LL25 | 47 | Conwy |
| LL26 | 208 | Conwy |
| LL27 | 47 | Conwy |
| LL28 | 448 | Conwy |
| LL29 | 617 | Conwy |
| LL30 | 680 | Conwy |
| LL31 | 281 | Conwy |
| LL32 | 279 | Conwy |
| LL33 | 167 | Conwy |
| LL34 | 186 | Conwy |
| LL35 | 99 | Gwynedd |
| LL36 | 246 | Gwynedd |
| LL37 | 40 | Gwynedd |
| LL38 | 47 | Gwynedd |
| LL39 | 19 | Gwynedd |
| LL40 | 354 | Gwynedd |
| LL41 | 376 | Gwynedd |
| LL42 | 151 | Gwynedd |
| LL43 | 29 | Gwynedd |
| LL44 | 52 | Gwynedd |
| LL45 | 54 | Gwynedd |
| LL46 | 94 | Gwynedd |
| LL47 | 47 | Gwynedd |
| LL48 | 160 | Gwynedd |
| LL49 | 194 | Gwynedd |
| LL51 | 45 | Gwynedd |
| LL52 | 160 | Gwynedd |
| LL53 | 812 | Gwynedd |
| LL54 | 522 | Gwynedd |
| LL55 | 742 | Gwynedd |
| LL56 | 74 | Gwynedd |
| LL57 | 904 | Gwynedd |
| LL58 | 192 | Isle of Anglesey |
| LL59 | 201 | Isle of Anglesey |
| LL60 | 111 | Isle of Anglesey |
| LL61 | 248 | Isle of Anglesey |
| LL62 | 119 | Isle of Anglesey |
| LL63 | 105 | Isle of Anglesey |
| LL64 | 58 | Isle of Anglesey |
| LL65 | 922 | Isle of Anglesey |
| LL66 | 22 | Isle of Anglesey |
| LL67 | 61 | Isle of Anglesey |
| LL68 | 235 | Isle of Anglesey |
| LL69 | 35 | Isle of Anglesey |
| LL70 | 20 | Isle of Anglesey |
| LL71 | 86 | Isle of Anglesey |
| LL72 | 44 | Isle of Anglesey |
| LL73 | 13 | Isle of Anglesey |
| LL74 | 80 | Isle of Anglesey |
| LL75 | 60 | Isle of Anglesey |
| LL76 | 9 | Isle of Anglesey |
| LL77 | 255 | Isle of Anglesey |
| LL78 | 22 | Isle of Anglesey |