| Port Code | Port Name | Country |
| NLMKE | Munnekeburen | Netherlands |
| NLMKK | Meerkerk | Netherlands |
| NLMKN | Marken | Netherlands |
| NLMKP | Moerkapelle | Netherlands |
| NLMKZ | Munnekezijl | Netherlands |
| NLMLA | Middelaar | Netherlands |
| NLMLL | Mill | Netherlands |
| NLMLR | Millingen aan de Rijn | Netherlands |
| NLMNN | Monnickendam | Netherlands |
| NLMNT | Montfoort | Netherlands |
| NLMNU | Menaldum | Netherlands |
| NLMOE | Moerdijk | Netherlands |
| NLMOG | Molenaarsgraaf | Netherlands |
| NLMOK | Mook | Netherlands |
| NLMON | Monster | Netherlands |
| NLMOO | Moordrecht | Netherlands |
| NLMOT | Molenschot | Netherlands |
| NLMRS | Maarssenbroek | Netherlands |
| NLMRT | Maartensdijk | Netherlands |
| NLMRU | Marssum | Netherlands |
| NLMSB | Maasbracht | Netherlands |
| NLMSD | Maasdam | Netherlands |
| NLMSL | Maassluis | Netherlands |
| NLMSS | Maarssen | Netherlands |
| NLMST | Maastricht | Netherlands |
| NLMSV | Maasvlakte | Netherlands |
| NLMSW | Mensingeweer | Netherlands |
| NLMUD | Muiden | Netherlands |
| NLMVE | Middelie | Netherlands |
| NLNAA | Naarden | Netherlands |
| NLNAM | Nieuw-Amsterdam | Netherlands |
| NLNAW | Naaldwijk | Netherlands |
| NLNBG | Nieuwerbrug | Netherlands |
| NLNBU | Nieuwe Brug | Netherlands |
| NLNDB | Nederhorst den Berg | Netherlands |
| NLNDI | Nieuwediep | Netherlands |
| NLNDL | Noordwijk aan Zee | Netherlands |
| NLNDP | Nootdorp | Netherlands |
| NLNEC | Neck | Netherlands |
| NLNEE | Neede | Netherlands |
| NLNER | Neer | Netherlands |
| NLNES | Nes | Netherlands |
| NLNHE | Nijehaske | Netherlands |
| NLNHM | Nieuwehorne | Netherlands |
| NLNIE | Nieuwerkerk aan den IJssel | Netherlands |
| NLNIH | Nieuwenhagen | Netherlands |
| NLNIJ | Nijmegen | Netherlands |
| NLNIS | Nispen | Netherlands |
| NLNIU | Nieuwdorp | Netherlands |
| NLNKK | Nijkerk | Netherlands |
| NLNKV | Nijkerkerveen | Netherlands |
| NLNLG | Nagele | Netherlands |
| NLNLK | Nieuw-Lekkerland | Netherlands |
| NLNMD | Nijemirdum | Netherlands |
| NLNNE | Annen | Netherlands |
| NLNNN | Nuenen | Netherlands |
| NLNOJ | Noordwijkerhout | Netherlands |
| NLNPK | Nieuwe Pekela | Netherlands |
| NLNRW | Nederweert | Netherlands |
| NLNSA | Nes aan de Amstel | Netherlands |
| NLNSB | Nieuwe Schans | Netherlands |
| NLNSC | Nieuweschans | Netherlands |
| NLNSD | Nieuw-Scheemda | Netherlands |
| NLNSS | Nisse | Netherlands |
| NLNSU | Nessersluis | Netherlands |
| NLNSW | Noord-Scharwoude | Netherlands |
| NLNSZ | Nieuwe Statenzijl | Netherlands |
| NLNTH | Nuth | Netherlands |
| NLNTO | Ten Boer | Netherlands |
| NLNUD | Numansdorp | Netherlands |
| NLNUI | Nuis | Netherlands |
| NLNUN | Nunspeet | Netherlands |
| NLNVD | Nijverdal | Netherlands |
| NLNVE | Nieuw-Vennep | Netherlands |
| NLNVO | Nieuw-Vossemeer | Netherlands |
| NLNVP | Nieuw-Vennep | Netherlands |
| NLNWG | Nieuwegein | Netherlands |
| NLNWK | Nieuwkoop | Netherlands |
| NLNWL | Nieuwleusen | Netherlands |
| NLNWO | Nieuwolda | Netherlands |
| NLNWP | Nieuwpoort | Netherlands |
| NLNWS | Nieuwstadt | Netherlands |
| NLNWT | Nieuwe-Tonge | Netherlands |
| NLNWV | Nieuwveen | Netherlands |
| NLNZI | Niezijl | Netherlands |
| NLNZJ | Nijezijl | Netherlands |
| NLOAI | Ouderkerk aan den IJssel | Netherlands |
| NLOBD | Obdam | Netherlands |
| NLOBG | Oostburg | Netherlands |
| NLOBL | Oud-Beijerland | Netherlands |
| NLOBO | Oudenbosch | Netherlands |
| NLOCC | Ochten | Netherlands |
| NLODH | Oudenhoorn | Netherlands |
| NLODK | Odijk | Netherlands |
| NLODP | Oude Pekela | Netherlands |
| NLODR | Ouderkerk aan de Amstel | Netherlands |
| NLODT | Oude-Tonge | Netherlands |
| NLODW | Oudewater | Netherlands |
| NLOED | St Oedenrode | Netherlands |
| NLOGE | Oegstgeest | Netherlands |