| From | To | Region |
|---|---|---|
| AAAA | DZZZ | South-west Pacific, Arctic Circle, Canada, West Africa |
| EAAA | EZZZ | Northern Europe |
| FAAA | FVZZ | Africa |
| FWAA | HZZZ | Africa |
| KAAA | KZZZ | United States of America |
| LAAA | LZZZ | Southern Europe |
| MAAA | NZZZ | Central America, Southern Pacific |
| OAAA | OZZZ | Middle East |
| PAAA | RZZZ | United States of America, Northern Pacific, Eastern Pacific Rim |
| SAAA | SZZZ | South America |
| TAAA | UZZZ | Caribbean, Russian Federation |
| VAAA | WZZZ | Far East |
| YAAA | YZZZ | Australia |
| ZAAA | ZZZZ | China, Mongolia, North Korea |
| Examples | |||||||
|---|---|---|---|---|---|---|---|
| L | Southern Europe | L | Southern Europe | L | Southern Europe | E | Northern Europe |
| Y | Serbia (Yugoslavia) | E | España | O | Österreich | S | Sweden |
| B | Belgrade Nikola Tesla Intl. |
M | Madrid Barajas Intl. |
W | Wien Schwechat |
S | Stockholm |
| E | D | W | A | Arlanda | |||