

| XAB | Abbeville | Abbeville | France |
| XAC | Arcachon | La Teste-de-Buch | France |
| XAL | Alamos | Alamos | Mexico |
| XAP | Chapeco | Serafin Enoss Bertaso Airport | Brazil |
| XAR | Aribinda | Aribinda | Burkina Faso |
| XAU | Saul | Saul | French Guiana |
| XAY | Xayabury | Xayabury | Laos |
| XBB | Blubber Bay | Blubber Bay | Canada |
| XBE | Bearskin Lake | Bearskin Lake | Canada |
| XBG | Bogande | Bogande | Burkina Faso |
| XBJ | Birjand | Birjand International Airport | Iran |
| XBL | Buno Bedele | Buno Bedele | Ethiopia |
| XBN | Biniguni | Biniguni | Papua New Guinea |
| XBO | Boulsa | Boulsa | Burkina Faso |
| XBR | Brockville | Brockville | Canada |
| XBW | Killineq | Killineq | Canada |
| XCH | Christmas Island | Christmas Island | Christmas Island |
| XCL | Cluff Lake | Cluff Lake | Canada |
| XCM | Chatham | Chatham | Canada |
| XCN | Coron | Coron | Philippines |
| XCO | Colac | Colac | Australia |
| XCR | Vatry | Paris Vatry Airport (Aircraft training and cargo airport) |
France |
| XDE | Diebougou | Diebougou | Burkina Faso |
| XDJ | Djibo | Djibo | Burkina Faso |
| XEN | Xingcheng | Xingcheng | PR China |
| XES | Lake Geneva (WI) | Municipal | USA |
| XEX | Paris | Aerogare des Invalides | France |
| XFN | Xiangfan | Xiangfan | PR China |
| XFW | Hamburg/Finkenwerder | Hamburg Finkenwerder Airport (Airbus) | Germany |
| XFZ | Quebec | Charny | Canada |
| XGA | Gaoua | Gaoua | Burkina Faso |
| XGG | Gorom-Gorom | Gorom-Gorom | Burkina Faso |
| XGN | Xangongo | Xangongo | Angola |
| XGR | Kangiqsualujjuaq | Kangiqsualujjuaq | Canada |
| XIC | Xichang | Xichang | PR China |
| XIE | Xienglom | Xienglom | Lao PDR |
| XIG | Xinguara | Municipal | Brazil |
| XIL | Xilinhot | Xilinhot | PR China |
| XIN | Xingning | Xingning | PR China |
| XIY | Xi'an | Xi'an Xianyang International Airport | Shaanxi, China |
| XKA | Kantchari | Kantchari | Burkina Faso |
| XKH | Xieng Khouang | Xieng Khouang | Lao PDR |
| XKO | Kemano | Kemano | Canada |
| XKS | Kasabonika | Kasabonika | Canada |
| XKT | Kennedy Town | Off-line Point | Hong Kong, PR China |
| XKY | Kaya | Kaya | Burkina Faso |
| XLB | Lac Brochet | Lac Brochet | Canada |
| XLF | Leaf Bay | Leaf Bay | Canada |
| XLO | Long Xuyen | Long Xuyen | Viet Nam |
| XLS | St Louis | St Louis | Senegal |
| XLU | Leo | Leo | Burkina Faso |
| XLW | Lemwerder | Lemwerder | Germany |
| XMA | Maramag | Maramag | Philippines |
| XMB | M'Bahiakro | M'Bahiakro | Cote d'Ivoire |
| XMC | Mallacoota | Mallacoota | Australia |
| XMD | Madison (SD) | Madison | USA |
| XMG | Mahendranagar | Mahendranagar | Nepal |
| XMH | Manihi | Manihi | French Polynesia |
| XMI | Masasi | Masasi | Tanzania |
| XML | Minlaton | Minlaton | Australia |
| XMN | Xiamen | Xiamen Gaoqi International Airport | Fujian, China |
| XMP | Macmillan Pass | Macmillan Pass | Canada |
| XMS | Macas | Macas | Ecuador |
| XMY | Yam Island | Yam Island | Australia |
| XNA | Fayetteville (AR) | Northwest Arkansas Rgn | USA |
| XNG | Quang Ngai | Quang Ngai | Viet Nam |
| XNN | Xining | Xining | PR China |
| XNT | Xingtai | Xingtai | PR China |
| XNU | Nouna | Nouna | Burkina Faso |
| XPA | Pama | Pama | Burkina Faso |
| XPK | Pukatawagan | Pukatawagan | Canada |
| XPL | Comayagua | Palmerola Air Base | Honduras |
| XPP | Poplar River | Poplar River | Canada |
| XPR | Pine Ridge (SD) | Pine Ridge | USA |
| XPU | West Kuparuk (AK) | West Kuparuk | USA |
| XQP | Quepos | Quepos | Costa Rica |
| XQU | Qualicum | Qualicum | Canada |
| XRR | Ross River | Ross River | Canada |
| XRY | Jerez de la Frontera | La Parra | Spain |
| XSA | Sinoe | AFC | Liberia |
| XSC | South Caicos | International | Turks and Caicos Islands |
| XSD | Tonopah (NV) | Test Range | USA |
| XSE | Sebba | Sebba | Burkina Faso |
| XSI | South Indian Lake | South Indian Lake | Canada |
| XSM | St Marys (MD) | St Marys | USA |
| XSO | Siocon | Siocon | Philippines |
| XSP | Singapore | Seletar | Singapore |
| XTG | Thargomindah | Thargomindah | Australia |
| XTL | Tadoule Lake | Tadoule Lake | Canada |
| XTO | Taroom | Taroom | Australia |
| XTR | Tara | Tara | Australia |
| XTT | Paris | Etoile | France |
| XUZ | Xuzhou | Xuzhou | PR China |
| XVL | Vinh Long | Vinh Long | Viet Nam |
| XWP | Hassleholm | Hassleholm | Sweden |
| XWQ | Enkoping | Enkoping | Sweden |
| XWZ | Nykoping | Nykoping | Sweden |
| XXA | Alvesta | Alvesta | Sweden |
| XXK | Katrineholm | Katrineholm | Sweden |
| XXU | Hedemora | Hedemora | Sweden |
| XYA | Yandina | Yandina Airport | Solomon Islands |
| XYE | Ye | Ye Airport | Myanmar |
| XYI | Flen | Flen | Sweden |
| XYO | Karlshamn | Karlshamn | Sweden |
| XYP | Avesta Krylbo | Avesta Krylbo | Sweden |
| XYR | Yellow River | Edwaki | Papua New Guinea |
| XYT | Toulouse (disused) | Montaudran | France |
| XYU | Solvesborg | Solvesborg | Sweden |
| XYX | Sala | Sala | Sweden |
| XZA | Zabre | Zabre | Burkina Faso |