| Code | Name | Region |
|---|---|---|
| BEPAS | Passendale | VWV |
| BEPCQ | Pecq | WHT |
| BEOPH | Ophasselt | VOV |
| BEOHN | Ophoven | VLI |
| BEOPI | Opitter | VLI |
| BEOPO | Opont | WLX |
| BEOIJ | Opwijk | VBR |
| BEORQ | Orcq | WHT |
| BEOYE | Oreye | WLG |
| BEOGE | Ormeignies | WHT |
| BEOJA | Orp-jauche | WBR |
| BEORR | Orroir | WHT |
| BEOTO | Ortho | WLX |
| BEOTS | Ostiches | WHT |
| BEOTG | Otegem | VWV |
| BELOA | Oteppe | WLG |
| BEOTI | Ottignies-louvain-la Neuve | WBR |
| BEODM | Oudegem | VOV |
| BEOUD | Oudenaarde | VOV |
| BEODA | Oudenaken | VBR |
| BEOBG | Oudenburg | VWV |
| BEOMA | Omal | WLG |
| BEOBT | Ombret-rawsa | WLG |
| BEOAY | Onhaye | WNA |
| BEOZL | Onkerzele | VOV |
| BELVW | Onze-lieve-vrouw-waver | VAN |
| BEOOG | Ooigem | VWV |
| BEOOS | Oostakker | VOV |
| BEOKO | Oosteeklo | VOV |
| BEOST | Oostende (ostend) | VWV |
| BEOTL | Oosterlo | VAN |
| BEOZE | Oosterzele | VOV |
| BEOSH | Oostham | VLI |
| BEOKP | Oostkamp | VWV |
| BEOTK | Oostkerke | VWV |
| BEOSL | Oostmalle | VAN |
| BEOSR | Oostrozebeke | VWV |
| BEOSV | Oostvleteren | VWV |
| BEOWI | Oostwinkel | VOV |
| BEOPG | Opglabbeek | VLI |
| BEOSI | Ophain-bois-seigneur-isaac | WBR |
| BENSG | Nossegem | VBR |
| BENVE | Nouvelles | WHT |
| BENUK | Nukerke | VOV |
| BEOBI | Obigies | WHT |
| BEOBR | Obourg | WHT |
| BEVLD | Oedelem | VWV |
| BEOEL | Oelegem | VAN |
| BEOSG | Oeselgem | VWV |
| BEOGI | Oeudeghien | WHT |