| Port Code | Port Name | Country |
| GBDKW | Dunkeswell | United Kingdom |
| GBDLG | Dolgellau | United Kingdom |
| GBDLK | Dalkeith | United Kingdom |
| GBDLS | Dalston | United Kingdom |
| GBDLX | Dalry | United Kingdom |
| GBDMC | Dymock | United Kingdom |
| GBDMR | Dalmuir | United Kingdom |
| GBDMT | Dechmont | United Kingdom |
| GBDNB | Danbury | United Kingdom |
| GBDND | Riverside Park Apt/Dundee | United Kingdom |
| GBDNG | Donnington | United Kingdom |
| GBDNH | Denholme | United Kingdom |
| GBDNQ | Dean Quarry | United Kingdom |
| GBDNR | Dunsford | United Kingdom |
| GBDNS | Durness | United Kingdom |
| GBDNT | Doonfoot | United Kingdom |
| GBDNU | Dunoon | United Kingdom |
| GBDNV | Denver | United Kingdom |
| GBDNY | Denny | United Kingdom |
| GBDOC | Dornoch | United Kingdom |
| GBDON | Doncaster | United Kingdom |
| GBDOT | Dorrington | United Kingdom |
| GBDOU | Doune | United Kingdom |
| GBDOW | Downham Market | United Kingdom |
| GBDPC | Deepcut | United Kingdom |
| GBDQF | Dukinfield | United Kingdom |
| GBDRF | Driffield | United Kingdom |
| GBDRG | Drighlington | United Kingdom |
| GBDRH | Durham | United Kingdom |
| GBDRL | Darlington | United Kingdom |
| GBDRM | Drummore | United Kingdom |
| GBDRN | Dronfield | United Kingdom |
| GBDRO | Droitwich | United Kingdom |
| GBDRR | Durrington | United Kingdom |
| GBDRS | Darlaston | United Kingdom |
| GBDRY | Droylsden | United Kingdom |
| GBDSB | Desborough | United Kingdom |
| GBDSE | Deeside | United Kingdom |
| GBDSL | Disley | United Kingdom |
| GBDST | Duston | United Kingdom |
| GBDSX | Hibaldstow | United Kingdom |
| GBDTE | Dunstable | United Kingdom |
| GBDTG | Dartington | United Kingdom |
| GBDTH | Ditchling | United Kingdom |
| GBDTM | Dartmouth | United Kingdom |
| GBDTN | Dunston | United Kingdom |
| GBDTO | Darton | United Kingdom |
| GBDTT | Ditton | United Kingdom |
| GBDUB | Dunblane | United Kingdom |
| GBDUD | Dundonald | United Kingdom |
| GBDUF | Duffield | United Kingdom |
| GBDUL | Dundonald | United Kingdom |
| GBDUM | Dumfries | United Kingdom |
| GBDUN | Dundee | United Kingdom |
| GBDUR | Dursley | United Kingdom |
| GBDUY | Dunmurry | United Kingdom |
| GBDVP | Devonport | United Kingdom |
| GBDVR | Dover | United Kingdom |
| GBDVY | Daventry | United Kingdom |
| GBDVZ | Devizes | United Kingdom |
| GBDWD | Downend | United Kingdom |
| GBDWK | Downpatrick | United Kingdom |
| GBDWN | Darwen | United Kingdom |
| GBDWY | Dewsbury | United Kingdom |
| GBDXF | Duxford | United Kingdom |
| GBDXY | Derby | United Kingdom |
| GBDYC | Dyce | United Kingdom |
| GBEAD | East Dereham | United Kingdom |
| GBEAL | Eastleigh | United Kingdom |
| GBEAM | Eastham | United Kingdom |
| GBEAN | Easton | United Kingdom |
| GBEAO | Easton | United Kingdom |
| GBEAR | Earls Barton | United Kingdom |
| GBEAS | East Malling | United Kingdom |
| GBEAT | Eastleigh | United Kingdom |
| GBEAW | Eastburn | United Kingdom |
| GBEAY | Eastry | United Kingdom |
| GBEBB | Ebbw Vale | United Kingdom |
| GBEBF | East Bedfont/London | United Kingdom |
| GBEBO | Eastbourne | United Kingdom |
| GBECC | Ecclesfield | United Kingdom |
| GBECS | Eccles | United Kingdom |
| GBEDB | Enderby | United Kingdom |
| GBEDE | Edenbridge | United Kingdom |
| GBEDG | Edgware | United Kingdom |
| GBEDI | Edinburgh | United Kingdom |
| GBEDM | Edmonton | United Kingdom |
| GBEDW | Edwinstowe | United Kingdom |
| GBEDY | Eardisley | United Kingdom |
| GBEDZ | Edzell | United Kingdom |
| GBEFD | Eastfield | United Kingdom |
| GBEGD | East Grinstead | United Kingdom |
| GBEGG | Egglescliffe | United Kingdom |
| GBEGH | Egham | United Kingdom |
| GBEGL | Eaglescliffe | United Kingdom |
| GBEHA | East Harling | United Kingdom |
| GBEIG | Easton-in-Gordano | United Kingdom |
| GBEKB | East Kilbride | United Kingdom |
| GBEKI | Erskine | United Kingdom |
| GBELE | Elsenham | United Kingdom |