| Code | Name | Region |
|---|---|---|
| GBLRW | Llanrwst | CWY |
| GBLMT | Llansamlet | SWA |
| GBLFF | Llansteffan | CMN |
| GBLLS | Llanstephan | CMN |
| GBLTR | Llantarnam | TOF |
| GBLLT | Llantrisant | RCT |
| GBLTM | Llantwit Major | VGL |
| GBLFW | Llanvair Waterdine | SHR |
| GBLRN | Llanwarne | HEF |
| GBXLW | Llanwern | NWP |
| GBLW9 | Llanwrda | CMN |
| GBLRS | Llanwrst | CWY |
| GBLYY | Llanybydder | CMN |
| GBLYC | Llanymynech | POW |
| GBLLY | Llay | WRX |
| GBLWG | Llwyngwril | GWN |
| GBLL9 | Llanelwedd | POW |
| GBLAE | Llanenddwyn | GWN |
| GBLRM | Llanerchymedd | AGY |
| GBNFG | Llanfaelog | AGY |
| GBLFC | Llanfairfechan | CWY |
| GBLFP | Llanfairpwllgwyngyll | GWN |
| GBLAF | Llanfrothen | GWN |
| GBLLF | Llanfrynach | POW |
| GBLFY | Llanfyllin | POW |
| GBLFH | Llanfyrnach | PEM |
| GBLNG | Llangadog | CMN |
| GBLHW | Llangammarch Wells | POW |
| GBLGA | Llangarron | HEF |
| GBLGK | Llangattock | POW |
| GBLGI | Llangefni | AGY |
| GBLLI | Llangeinor | BGE |
| GBLLG | Llangennech | CMN |
| GBLLE | Llangoed | GWN |
| GBLNL | Llangollen | DEN |
| GBXLG | Llangorse | POW |
| GBLAA | Llanallgo | AGY |
| GBLAM | Llanarmon | GWN |
| GBLMY | Llanarmon-yn-ial | DEN |
| GBLTY | Llanarthney | CMN |
| GBLNB | Llanbedr | GWN |
| GBGOC | Llanbedrgoch | AGY |
| GBLBI | Llanberis | GWN |
| GBAAW | Llandanwg | GWN |
| GBLLD | Llanddulas | CWY |
| GBLLA | Llandeilo | CMN |
| GBLDV | Llandovery | CMN |
| GBLND | Llandow | VGL |
| GBANR | Llandre | CGN |
| GBLDW | Llandrindod Wells | POW |