| Code | Name | Region |
|---|---|---|
| GBDU5 | Dunkirk | KEN |
| GBUUP | Dunmow | ESS |
| GBDUY | Dunmurry | LSB |
| GBDGU | Dunning | PKN |
| GBDGT | Dunnington | ERY |
| GBDNU | Dunoon | AGB |
| GBDNF | Dunrossness And Fair Isle | ZET |
| GBDUS | Duns | SCB |
| GBDCO | Dunscroft | YOR |
| GBDSK | Dunseverick | ANT |
| GBDSF | Dunsfold | SRY |
| GBDNR | Dunsford | |
| GBDTE | Dunstable | CBF |
| GBDTF | Dunstaffnage | AGB |
| GBDNE | Dunster | SOM |
| GBDTN | Dunston | GAT |
| GBDBY | Dulas Bay | AGY |
| GBDLL | Dullingham | CAM |
| GBCW2 | Duloe | CON |
| GBDVO | Dulverton | SOM |
| GBDWC | Dulwich | |
| GBDBT | Dumbarton | WDU |
| GBDUM | Dumfries | DGY |
| GBDBR | Dunbar | ELN |
| GBDUE | Dunbeath | HLD |
| GBDUB | Dunblane | STG |
| GBDUC | Dunchurch | WAR |
| GBDUN | Dundee | DND |
| GBDUD | Dundonald | BFS |
| GBDUL | Dundonald | CSR |
| GBDDD | Dundonald | SAY |
| GBDDN | Dundrennan | DGY |
| GBDDM | Dundrum | DOW |
| GBDFR | Dunfermline | FIF |
| GBDGN | Dungannon | DGN |
| GBDSS | Dungeness | KEN |
| GBDRG | Drighlington | LDS |
| GBDRO | Droitwich | WOR |
| GBDMO | Dromore | BNB |
| GBDRN | Dronfield | DBY |
| GBDXO | Droxford | HAM |
| GBDRY | Droylsden | TAM |
| GBDMH | Drumahoe | DRS |
| GBDCP | Drumchapel | GLG |
| GBKIE | Drumfearn | HLD |
| GBDUT | Drumintee | ARM |
| GBDRM | Drummore | DGY |
| GBDMQ | Drumquin | OMH |
| GBDRA | Dry Drayton | CAM |
| GBRRK | Drybrook | GLS |