| Code | Name | Region |
|---|---|---|
| CHNWG | Niederweningen | ZH |
| CHNWT | Niederwichtrach | BE |
| CHNOR | Noranco | TI |
| CHNOT | Nottwil | LU |
| CHNOZ | Novazzano | TI |
| CHNEF | Nafels | GL |
| CHNKN | Nanikon | ZH |
| CHNAT | Naters | VS |
| CHNBK | Nebikon | LU |
| CHNRH | Neerach | ZH |
| CHNFH | Neftenbach | ZH |
| CHNDZ | Nendaz | VS |
| CHNES | Nesslau | SG |
| CHNTL | Netstal | GL |
| CHQNC | Neuchatel | NE |
| CHNER | Neudorf | LU |
| CHNEU | Neuendorf | SO |
| CHNGG | Neuenegg | BE |
| CHNHF | Neuenhof | AG |
| CHNEK | Neuenkirch | LU |
| CHNUS | Neuhaus | SG |
| CHNHR | Neuhausen Am Rheinfall | SH |
| CHNHM | Neuheim | ZG |
| CHNKS | Neunkirch | SH |
| CHNEN | Neuwilen | TG |
| CHMPF | Mumpf | AG |
| CHMNB | Munchenbuchsee | BE |
| CHMUS | Munchenstein | BL |
| CHMWR | Munchenwiler | BE |
| CHMUN | Munchwilen | AG |
| CHMWI | Munchwilen | TG |
| CHMSN | Munsingen | BE |
| CHMSL | Munsterlingen | TG |
| CHMYY | Muntschemier | BE |
| CHMUO | Muolen | SG |
| CHMTH | Muotathal | SZ |
| CHMUG | Murg | SG |
| CHMRG | Murgenthal | AG |
| CHMUR | Muri | AG |
| CHMBB | Muri Bei Bern | BE |
| CHMTN | Murten | FR |
| CHMSR | Mustair | GR |
| CHMUW | Muswangen | LU |
| CHMUT | Muttenz | BL |
| CHMUZ | Muzzano | TI |
| CHVVD | Mont-sur-rolle | VD |
| CHMLU | Moosleerau | AG |
| CHMSF | Moosseedorf | BE |
| CHMOE | Morel | VS |
| CHMOS | Morges | VD |