| PO Number | Town / Place name | Code |
|---|---|---|
| E01 | Brindscombe | |
| E02 | Mill Street, Aberdare | |
| E03 | Letterston | |
| E04 | Dinas Cross | |
| E05 | Solva | |
| E06 | Newmarket, Jamaica | |
| E07 | Newport, Pem | |
| E08 | St. David's Haverfordwest | |
| E09 | Tangiers Haverfordwest | |
| E10 | Treffgarne | |
| E11 | Wolfscastle | |
| E12 | Dwrbach | |
| E13 | Camrose | |
| E14 | Roch | |
| E15 | Penycwm | |
| E16 | Altywalis | |
| E17 | New Inn, Carmarthen | |
| E18 | Llanbyther | |
| E19 | Llanwren | |
| E20 | Talsam | |
| E21 | Ciliau Aeron | |
| E22 | Aberarth | |
| E23 | Llanon | |
| E24 | Llanrhystid | |
| E25 | Brimfield | |
| E26 | Cenarth | |
| E27 | Llechyryd | |
| E28 | Cwmamon | |
| E29 | South Benfleet | |
| E30 | Lacovia, Jamaica | |
| E31 | Little Haywood | |
| E32 | Pontlottyn | |
| E33 | New Barnet | |
| E34 | Llandore | |
| E35 | Morriston | |
| E36 | Clydach | |
| E37 | Pontardine | |
| E38 | Ystalyfern | |
| E39 | Ystradgynlais | |
| E40 | Abergwilly | |
| E41 | Llanarthney | |
| E42 | Nantgeradig | |
| E43 | Glanbrydan | |
| E44 | Golden Grove | |
| E45 | Fulbourne | |
| E46 | Sketty | |
| E47 | Parkmill | |
| E48 | Penclawdd | |
| E49 | Reynoldstown | |
| E50 | Ynysmudw | |
| E51 | Cwmburla, Greenhill | |
| E52 | Henfield | |
| E53 | Port-au-Prince, Haiti | |
| E54 | Cross Inn, Llanelly | |
| Ammanford | ||
| E55 | Cwmamman | |
| E56 | Treforest | |
| E57 | Haughley | |
| E58 | Little River, Jamaica | |
| E59 | Llanpumpsaint | |
| E60 | Llangunllo | |
| E61 | Dolau | |
| E62 | Llandridnod | |
| E63 | Llangammarch | |
| E64 | Beulah | |
| E65 | Llanwrtyd | |
| E66 | Havingham | |
| E67 | Slingsby | |
| E68 | New Quay, Cardigan | |
| E69 | Winforton | |
| E70 | Whitney | |
| E71 | Clifford | |
| E72 | Talgarth | |
| E73 | Carnforth | |
| E74 | Penmaenmawr | |
| E75 | Leamside | |
| E76 | Didcot | |
| E77 | Ferryside | |
| E78 | Chigwell Road | |
| E79 | Burwash | |
| E80 | Mortimer | |
| E81 | Etchingham | |
| E82 | Norham | |
| E83 | Caterham Valley | |
| E84 | Garth | |
| E85 | Begelly | |
| E86 | Saundersfoot | |
| E87 | Crook | |
| E88 | Colon, Colombia | |
| E89 | Tyne Docks, South Shields | |
| E90 | Pencader | |
| E91 | Conwill | |
| E92 | Burry Port | |
| E93 | Horley | |
| E94 | Gloucester Station | |
| E95 | Brentford | |
| E96 | Pontrilas | |
| E97 | Isleworth | |
| E98 | Aberavon | |
| E99 | Cwmavan | |
| Carnarvon |