| M2 | SMS/Chat: Me too |
| ma | Internet: Landekode for Marokko |
| mc | Internet: Landekode for Monaco |
| md | Internet: Landekode for Moldova |
| Mdm. | Forkortelse: Madam, i betydningen "frue" |
| me | Internet: Landekode for Montenegro |
| mg | Internet: Landekode for Madagascar |
| MGT | SMS/Chat: Meget |
| mh | Internet: Landekode for Marshalløerne |
| mk | Internet: Landekode for Makedonien |
| ml | Internet: Landekode for Mali |
| mm | Internet: Landekode for Myanmar |
| mn | Internet: Landekode for Mongoliet |
| MN | SMS/Chat: Men |
| mo | Internet: Landekode for Macao |
| MOB | SMS/Chat: Mobil |
| MORN | SMS/Chat: Godmorgen, Morgen |
| mp | Internet: Landekode for Nordmarianerne |
| mq | Internet: Landekode for Martinique |
| mr | Internet: Landekode for Mauritanien |
| ms | Internet: Landekode for Montserrat |
| mt | Internet: Landekode for Malta |
| mu | Internet: Landekode for Mauritius |
| mv | Internet: Landekode for Maldiverne |
| mw | Internet: Landekode for Malawi |
| mx | Internet: Landekode for Mexico |
| my | Internet: Landekode for Malaysia |
| MYM | SMS/Chat: Mind your manners |
| MYZ | SMS/Chat: Kys |
| mz | Internet: Landekode for Mozambique |
| MÅZ | SMS/Chat: Kys |