| Andorra | C3- | 29- | No known registrations |
| Austria | OE- | 37- | |
| Austria | A- | 19-39 | numbers |
| Belgium | O-B | 19-29 | |
| Belgium | OO- | 29- | |
| Cyprus | VQ-C | 29- | No pre-war registrations |
| Danzig | Dz- | 29-39 | |
| Danzig (Germany/Poland) | Y-M | 19-29 | |
| Danzig (Germany/Poland) | YM- | 29-39 | |
| France | F- | 19- | |
| France | F-O | 29- | French Overseas Territories |
| France | FC- | 40-46 | Free French |
| Germany | WL- | -45 | Wehrmacht/Luftwafe |
| Germany | D- | 19-34 | numbers |
| Germany | D- | 34- | letters |
| Gibraltar | VR-G | 29-95 | No known pre-war registrations |
| Great Britain | G-E | 19-29 | |
| Great Britain | G-A | 29- | |
| Great Britain | G-F | 19-29 | Lighter than air |
| Great Britain | G-G | 37-37 | Gliders |
| British Territories | VP-,VQ-,VR- | 19- | |
| Greece | S-G | 19-29 | No known registrations |
| Greece | SX- | 29- | |
| Iceland | TF- | 37- | |
| Iceland | ISLAND- | 30-37 | |
| Ireland | EI- | 29- | |
| Italy | I- | 19- | |
| Liechenstein | HB-L | 35- | No known registrations |
| Luxembourg | UL- | 29-39 | |
| Luxembourg | LX- | 39- | |
| Luxembourg | L-U | 19- | No known registrations |
| Malta | VP-M | 29-68 | No registrations pre 1962 |
| Monaco | M-O | 19-29 | No known registrations |
| Monaco | CZ- | 29-49 | No known registrations |
| Netherlands | PH- | 29- | |
| Netherlands | H-N | 19-29 | |
| Portugal | C-P | 19-29 | |
| Portugal | CS- | 29- | |
| Portugal | CR- | 29- | Portuguese Overseas Territories |
| Saar Territories | EZ- | 29-35 | |
| Saar Territories | TS- | 29-35 | |
| Spain | EC- | 29- | |
| Spain | M- | 19-29 | |
| Switzerland | C-H | 19-29 | No known registrations |
| Switzerland | CH- | 29-36 | numbers |
| Switzerland | HB- | 35- | |
| Turkey | TC- | 29- | |
| Vatican City | HV- | | No known registrations |