| Code | Name | Region |
|---|---|---|
| BEOEV | Oevel | VAN |
| BEOGY | Ogy | WHT |
| BEOHA | Ohain | WBR |
| BEOHY | Ohey | WNA |
| BEOQC | Oisquercq | WBR |
| BEOKG | Okegem | VOV |
| BEOLN | Olen | VAN |
| BEOGS | Ollignies | WHT |
| BEOLM | Olmen | VAN |
| BEONE | Olne | WLG |
| BEOLS | Olsene | VOV |
| BENCO | Neuville-en-condroz | WLG |
| BENHY | Neuville-sous-huy | WLG |
| BENVL | Nevele | VOV |
| BENDM | Nidrum | WLG |
| BENIL | Niel | VAN |
| BENWO | Nieuwenhove | VOV |
| BENWK | Nieuwerkerken | VLI |
| BENWE | Nieuwerkerken | VOV |
| BENKW | Nieuwkerken-waas | VOV |
| BENIE | Nieuwpoort | VWV |
| BENRO | Nieuwrode | VBR |
| BENYL | Nijlen | VAN |
| BENBA | Nimy | WHT |
| BENNV | Ninove | VOV |
| BENIV | Nivelles | WBR |
| BENVN | Noeveren | VAN |
| BENFO | Noirefontaine | WLX |
| BENOK | Nokere | VOV |
| BENVX | Nollevaux | WLX |
| BENDW | Noorderwijk | VAN |
| BENSO | Nassogne | WLX |
| BENTE | Natoye | WNA |
| BENZH | Nazareth | VOV |
| BENBL | Nederboelare | VOV |
| BENED | Nederokkerzeel | VBR |
| BENVH | Neder-over-heembeek | VBR |
| BENHR | Nederzwalm-hermelgem | VOV |
| BENHA | Neerharen | VLI |
| BENLA | Neerlanden | VBR |
| BENRT | Neeroeteren | VLI |
| BENRP | Neerpelt | VLI |
| BENFE | Neffe | WNA |
| BENEG | Neigem | VOV |
| BENES | Nessonvaux | WLG |
| BENCA | Neufchateau | WLG |
| BENCU | Neufchateau | WLX |
| BENMA | Neufmaison | WHT |
| BENEU | Neufvilles | WHT |
| BENMO | Neu-moresnet | WLG |