Morse
Active stations or variants:
| ID | Country | Active counterparts | Inactive counterparts |
|---|---|---|---|
| M01 | Russia | ||
| M01a | |||
| M12 | E07, V07, XPA, XPA2, XPB, F07, P07 | G07, S07, V07f, XP | |
| M14 | E06, S06, F01, F06 | E17, G06, V06, V23 | |
| M23 | France |
Inactive stations or variants:
| ID | Country | Active counterparts | Inactive counterparts |
|---|---|---|---|
| M01b | Russia | ||
| M02 | Austria | E12, G12, V12, V18 | |
| M03 | Poland | E11, S11a, F03, P03 | G11, S11, F11 |
| M03a | E11c | ||
| M03b | |||
| M03c | E11b, S11b, F11 | ||
| M03d | |||
| M03e | |||
| M03f | |||
| M04 | Poland | G02a, E23 | |
| M05 | United Kingdom(?) | ||
| M06 | Czechia | S05b | |
| M06a | Czechoslovakia | S05a | |
| M07 | Czechia | ||
| M08 | Cuba | V02 | |
| M08a | HM01 | V02a, SK01 | |
| M10 | Czechia | S10d | |
| M10c | Czechoslovakia | S10b | |
| M11 | ? | S10e | |
| M13 | Bulgaria | E18, G22, S04 | |
| M13a | |||
| M13b | |||
| M13c | |||
| M13d | |||
| M13e | |||
| M17 | ? | E01 | |
| M29 | Hungary | G04 | |
| M29a | |||
| M39 | Czechia | ||
| M40 | North Korea | ||
| M45 | Russia | S21 | |
| M94 | South Korea | V24 | |
| M97 | Vietnam | V30 |