| Number | Prefix | Country | Continent | Callsign |
| 1 | 8Z4 | Saudi Arabia/Iraq NZ | AS | 8Z4A |
| 2 | DM | German Dem. Rep. | EU | Y21CL |
| 3 | HK0/B | Bajo Nuevo | NA | HK0AB |
| 4 | KZ5 | Canal Zone | NA | KZ5HI |
| 5 | OK/D | Czechoslovakia | EU | OK2SKM |
| 6 | PJ2/D | Netherland Antilles | SA | PJ4/N6IG |
| 7 | PJ7/D | Saint Maarten & Saba | NA | PJ5/K3RGD |
| 8 | ST0/D | Southern Sudan | AF | PA3CXC/ST0 |
| 9 | ZS0 | Penguin Islands | AF | ZS9Z/1 |
| 10 | ZS9 | Walvis Bay | AF | DF3EC/ZS9 |
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