| Code | Name | Region |
|---|---|---|
| CNMZU | Muzhou | GD |
| CNGYN | Nanan | GD |
| CNMSP | Maoshan Pt | HB |
| CNMTZ | Matouzhen | JX |
| CNMWN | Mawan Pt | GD |
| CNMAW | Mawei Pt | FJ |
| CNMAY | Mayong | GD |
| CNMZS | Mazongshan | GS |
| CNMCI | Mcid - Private Terminal | |
| CNMIO | Meiao | ZJ |
| CNMGG | Meigeng | AH |
| CNMLI | Meilin | FJ |
| CNMSA | Meisha Pt | GD |
| CNMSN | Meishan | ZJ |
| CNMSG | Meishan Pt | ZJ |
| CNEIX | Meixian | 61 |
| CNMXZ | Meixian Changgangji Apt | GD |
| CNMEZ | Meizhou | GD |
| CNMZW | Meizhouwan | FJ |
| CNMCX | Mengcheng | AH |
| CNMDN | Mengding | YN |
| CNMLN | Menglian | YN |
| CNLWN | Luwan | SH |
| CNLXP | Luxikou Pt | HB |
| CNLZI | Luzhai | GX |
| CNLUZ | Luzhou | SC |
| CNMAA | Ma'anshan | AH |
| CNMBI | Mabian Island | GD |
| CNMCH | Machong | GD |
| CNMAC | Macun | HI |
| CNSHM | Mafang | GD |
| CNMJS | Maji Shan | ZJ |
| CNMJD | Majiadian | HB |
| CNMAJ | Majistan/zhoushan | ZJ |
| CNMAN | Manas | XJ |
| CNMDL | Mandula | NM |
| CNMLX | Manzhouli | NM |
| CNNZH | Manzhouli Xijiao Apt | NM |
| CNMOG | Maogang | GD |
| CNMLG | Maoling | GX |
| CNMMI | Maoming | GD |
| CNMPP | Maoping Pt | HB |
| CNLUH | Lu-hua Shan | ZJ |
| CNLNN | Lunan | AH |
| CNLJO | Lunjiao | GD |
| CNLUB | Luobei | HL |
| CNLCW | Luochongwei | GD |
| CNLCN | Luocun | GD |
| CNLUO | Luoding | GD |
| CNLUG | Luogang | GD |