| 1 | X | HONG KONG ISLANDS LINE AMERICA SA | PWRC | ||
| 2 | X18 | TRAFFIC | |||
| 3 | X36 | TRAFFIC | |||
| 4 | X46 | TRAFFIC | |||
| 5 | X50 | TRAFFIC | |||
| 6 | X55 | TRAFFIC | |||
| 7 | XAA | Aeronautical Radio Inc | ICAO1 | ||
| 8 | XAAK | XAAK TRANSPORT INC | SCAC4 | ||
| 9 | XAB | Xabre Aerolineas | ICAO1 | ||
| 10 | XAC | Air Charter World | ICAO1 | ||
| 11 | XAD | Certified Air Dispatch | ICAO1 | ||
| 12 | XAF | Executive Air Fleet | ICAO1 | ||
| 13 | XAH | Executive Aircraft Services | ICAO1 | ||
| 14 | XAK | Airkenya | ICAO1 | ||
| 15 | XAM | AMR Services Corporation | ICAO1 | ||
| 16 | XANS | XAN SYSTEMS INC | SCAC4 | ||
| 17 | XANT | XPEDX TRANSPORTATION RICHMOND (DIV | SCAC4 | ||
| 18 | XANU | PETRO KIMIA NEGIN CO | SCAC4 | ||
| 19 | XAO | Airline Operations Services | ICAO1 | ||
| 20 | XAP | Midway Connection | ICAO1 | ||
| 21 | XAR | Travel Express Aviation Services | ICAO1 | ||
| 22 | XAS | PHH Aviation System | ICAO1 | ||
| 23 | XAT | AT and T Aviation Division | ICAO1 | ||
| 24 | XAV | Aviaprom Enterprises | ICAO1 | ||
| 25 | XAX | AirAsia X | MAL | TRAFFIC | |
| 26 | XBAR | BAY AREA RAPID TRANSIT (BART) | PWRC | ||
| 27 | XBG | City of Bangor | ICAO1 | ||
| 28 | XBO | Baseops International | ICAO1 | ||
| 29 | XBTK | X BORDER TRUCKING | SCAC4 | ||
| 30 | XC | CrossCountry trains | GB | TRAFFIC | |
| 31 | XC | Cross Country Trains Ltd | UK | VKM | |
| 32 | XCAD | XTRA CARTAGE AND DISTRIBUTION INC | SCAC4 | ||
| 33 | XCAG | XTREME CARGO INC | SCAC4 | ||
| 34 | XCC | Ecoturistica de Xcalak | ICAO1 | ||
| 35 | XCCX | Xavier Chemical Co. | added 10/1999; 7/2000; eliminated 4/2002; 7/2005 (not listed) | NAKINA | |
| 36 | XCCX | Xavier Chemical Co. | added 10/99; 7/2000 | NRHS | |
| 37 | XCCX | XAVIER CHEMICAL CO. | PWRC | ||
| 38 | XCCX | Xavier Chemical Corporation | RSRV | ||
| 39 | XCEL | X-CEL X-RAY CORP | SCAC4 | ||
| 40 | XCFS | XCF SA DE CV | SCAC4 | ||
| 41 | XCHZ | XTRA INTERMODAL | SCAC4 | ||
| 42 | XCIC | XPRESS CONNECTIONS INC | SCAC4 | ||
| 43 | XCL | Contel ASC | ICAO1 | ||
| 44 | XCLH | XOXXOX CHARTER BUS SERVICE INC | SCAC4 | ||
| 45 | XCLU | TEXTAINER SPECIAL EQUIP. LTD (SUBSID. OF TEXTAINER) | PWRC | ||
| 46 | XCLU | Textainer Special Equip. Limited | RSRV | ||
| 47 | XCLX | Xcel Energy | added 1/2006 | NAKINA | |
| 48 | XCLX | XCEL ENERGY | PWRC | ||
| 49 | XCLX | Xcel Energy | RSRV | ||
| 50 | XCLX | XCEL ENERGY | SCAC4 | ||
| 51 | XCO | Compuflight Operations Service | ICAO1 | ||
| 52 | XCPZ | XTRA INTERMODAL | SCAC4 | ||
| 53 | XCS | Compuserve Incorporated | ICAO1 | ||
| 54 | XCSI | XPRESS COURIER SERVICES INC | SCAC4 | ||
| 55 | XCT | Aero Costa Taxi Aereo | ICAO1 | ||
| 56 | XCTA | CHICAGO TRANSIT AUTHORITY | PWRC | ||
| 57 | XCTG | XCELERATED TRANSPORTATION GROUP LLC | SCAC4 | ||
| 58 | XCTS | CLEVELAND TRANSIT SYSTEM | PWRC | ||
| 59 | XCTU | (XTRZ) XTRA INTERMODAL | PWRC | ||
| 60 | XCTU | XTRA Intermodal (WPPA Ltd) | RSRV | ||
| 61 | XCTZ | XTRA INTERMODAL | PWRC | ||
| 62 | XCTZ | XTRA Intermodal | RSRV | ||
| 63 | XCTZ | XTRA INTERMODAL | SCAC4 | ||
| 64 | XCWZ | UNION PACIFIC [(XTRA) CHICAGO & NORTH WESTERN TRANS CO] | PWRC | ||
| 65 | XCWZ | Chicago & North Western (Union Pacific Railroad) | RSRV | ||
| 66 | XCWZ | UNION PACIFIC RAILROAD COMPANY | SCAC4 | ||
| 67 | XCX | Citibank | ICAO1 | ||
| 68 | XDA | Bureau Veritas | ICAO1 | ||
| 69 | XDD | Lockheed DUATS | ICAO1 | ||
| 70 | XDEC | X D EXPRESS CORP | SCAC4 | ||
| 71 | XDEL1 | NS | USA | TRAFFIC | |
| 72 | XDGL | XENIOS DUTCH GROWERS LIMITED | SCAC4 | ||
| 73 | XDIR | XPRESS DIRECT (DIV OF U S XPRESS IN | SCAC4 | ||
| 74 | XDIT | EXPEDITE IT LLC | SCAC4 | ||
| 75 | XDS | Dispatch Services | ICAO1 | ||
| 76 | XDT | Date Transformation Corp | ICAO1 | ||
| 77 | XDTZ | (XTRZ) RETIRED 10-19-93 ATP | PWRC | ||
| 78 | XDY | Dynair Services | ICAO1 | ||
| 79 | XEC | Air Executive Charter | ICAO1 | ||
| 80 | XEL | Excel Charter | ICAO1 | ||
| 81 | XELP | EL PASO CITY LINES | PWRC | ||
| 82 | XEME | XTREME TRANSPORTATION INC | SCAC4 | ||
| 83 | XENF | XENONFS LLC | SCAC4 | ||
| 84 | XER | Xerox Corporation | ICAO1 | ||
| 85 | XESI | XTEND ENERGY SERVICES INC | SCAC4 | ||
| 86 | XFA | FlyAsianXpress | IATA: D7 | ICAO1 | |
| 87 | XFCU | HUBEI XINGFA CHEMICALS GROUP CO LTD | SCAC4 | ||
| 88 | XFCZ | (XTRZ) XTRA INTERMODAL | PWRC | ||
| 89 | XFEZ | FLORIDA EAST COAST RWY | PWRC | ||
| 90 | XFEZ | Florida East Coast Railway | RSRV | ||
| 91 | XFS | American Flight Service Systems | ICAO1 | ||
| 92 | XFSI | XTREME FREIGHT SERVICE INC | SCAC4 | ||
| 93 | XFTC | X-FACTOR TRANSPORTATION COMPANY | SCAC4 | ||
| 94 | XFX | Airways Corporation of New Zealand | ICAO1 | ||
| 95 | XGA | General Aviation Terminal | ICAO1 | ||
| 96 | XGG | IMP Group Aviation Services | ICAO1 | ||
| 97 | XGPR | X G PRODUCTIONS | SCAC4 | ||
| 98 | XGS | Global System | ICAO1 | ||
| 99 | XGSI | XPRESS GLOBAL SYSTEMS INC | SCAC4 | ||
| 100 | XGW | Global Weather Dynamics | ICAO1 |