| Number | Prefix | Country | Continent | Callsign |
| 1 | 8Z4 | Saudi Arabia/Iraq NZ | AS | HZ1BS/8Z4 |
| 2 | A1 | Abu Ail & Jabal at Tair | AS | J20/Z |
| 3 | DM | German Dem. Rep. | EU | Y57WG |
| 4 | HK0/S | Serrana Bank | NA | HK0AA |
| 5 | KZ5 | Canal Zone | NA | KZ5RO |
| 6 | OK/D | Czechoslovakia | EU | OK2BSA |
| 7 | PJ2/D | Netherland Antilles | SA | PJ2/K1RM |
| 8 | PJ7/D | Saint Maarten & Saba | NA | K1CO/PJ7 |
| 9 | ST0/D | Southern Sudan | AF | PA3CXC/ST0 |
| 10 | ZS0 | Penguin Islands | AF | ZS9Z/1 |
| 11 | ZS9 | Walvis Bay | AF | ZS3LK/3 |
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