| Port Code | Port Name | Country |
| BEOBG | Oudenburg | Belgium |
| BEOBI | Obigies | Belgium |
| BEOBL | Zoersel | Belgium |
| BEOBR | Obourg | Belgium |
| BEOBT | Ombret-Rawsa | Belgium |
| BEODE | Oudergem (Auderghem)/Brussel (Bruxelles) | Belgium |
| BEODE | Auderghem (Oudergem)/Brussel (Bruxelles) | Belgium |
| BEOEL | Oelegem | Belgium |
| BEOEV | Oevel | Belgium |
| BEOGA | Outgaarden | Belgium |
| BEOGE | Ormeignies | Belgium |
| BEOGI | Oeudeghien | Belgium |
| BEOGS | Ollignies | Belgium |
| BEOGY | Ogy | Belgium |
| BEOHE | Oud-Heverlee | Belgium |
| BEOHN | Ophoven | Belgium |
| BEOHY | Ohey | Belgium |
| BEOIJ | Opwijk | Belgium |
| BEOJA | Orp-Jauche | Belgium |
| BEOKO | Oosteeklo | Belgium |
| BEOKP | Oostkamp | Belgium |
| BEOLE | Overboelare | Belgium |
| BEOLM | Olmen | Belgium |
| BEOLN | Olen | Belgium |
| BEOLS | Olsene | Belgium |
| BEOMA | Omal | Belgium |
| BEONE | Olne | Belgium |
| BEOOG | Ooigem | Belgium |
| BEOOS | Oostakker | Belgium |
| BEOPG | Opglabbeek | Belgium |
| BEOPO | Opont | Belgium |
| BEOPY | Oupeye | Belgium |
| BEOQC | Oisquercq | Belgium |
| BEORQ | Orcq | Belgium |
| BEOSH | Oostham | Belgium |
| BEOSI | Ophain-Bois-Seigneur-Isaac | Belgium |
| BEOSL | Oostmalle | Belgium |
| BEOSR | Oostrozebeke | Belgium |
| BEOST | Oostende (Ostend) | Belgium |
| BEOST | Ostend (Oostende) | Belgium |
| BEOSV | Oostvleteren | Belgium |
| BEOTG | Otegem | Belgium |
| BEOTH | Oud-Turnhout | Belgium |
| BEOTI | Ottignies-Louvain-la Neuve | Belgium |
| BEOTO | Ortho | Belgium |
| BEOTS | Ostiches | Belgium |
| BEOTY | Outrijve | Belgium |
| BEOUD | Oudenaarde | Belgium |
| BEOUF | Ouffet | Belgium |
| BEOUG | Ougrée | Belgium |
| BEOUT | Outer | Belgium |
| BEOVE | Overpelt | Belgium |
| BEOVR | Overijse | Belgium |
| BEOWI | Oostwinkel | Belgium |
| BEOYE | Oreye | Belgium |
| BEOZE | Oosterzele | Belgium |
| BEPAL | Paal | Belgium |
| BEPAS | Passendale | Belgium |
| BEPBE | Pellenberg | Belgium |
| BEPBI | Plombières | Belgium |
| BEPCL | Pont-à-Celles | Belgium |
| BEPCQ | Pecq | Belgium |
| BEPEE | Peer | Belgium |
| BEPEI | Peisegem | Belgium |
| BEPEP | Pepinster | Belgium |
| BEPER | Perk | Belgium |
| BEPES | Péronnes | Belgium |
| BEPFE | Profondeville | Belgium |
| BEPFV | Paifve | Belgium |
| BEPGI | Papignies | Belgium |
| BEPHI | Philippeville | Belgium |
| BEPIN | Pepingen | Belgium |
| BEPLB | Péronnes/Binche | Belgium |
| BEPLE | Pulle | Belgium |
| BEPLI | Paliseul | Belgium |
| BEPLO | Pont-de-Loup | Belgium |
| BEPLY | Petit-Lanaye | Belgium |
| BEPME | Pommeroeul | Belgium |
| BEPOL | Pollare | Belgium |
| BEPOP | Poperinge | Belgium |
| BEPPE | Poppel | Belgium |
| BEPPX | Pipaix | Belgium |
| BEPRI | Parike | Belgium |
| BEPRN | Petit-Roeulx-lez-Nivelles | Belgium |
| BEPRO | Pondrôme | Belgium |
| BEPRV | Proven | Belgium |
| BEPRW | Perwez | Belgium |
| BEPSE | Ploegsteert | Belgium |
| BEPST | Postel | Belgium |
| BEPSU | Poulseur | Belgium |
| BEPTI | Petit-Thier | Belgium |
| BEPTP | Pijp Tabak | Belgium |
| BEPTS | Pottes | Belgium |
| BEPTT | Pittem | Belgium |
| BEPUL | Pulderbos | Belgium |
| BEPUT | Putte | Belgium |
| BEPUU | Puurs | Belgium |
| BEPVX | Plainevaux | Belgium |
| BEPWE | Perwez | Belgium |
| BEPWZ | Péruwelz | Belgium |