| 101 | WABS | WARDANE ENTERPRISES INC | | | SCAC4 |
| 102 | WABT | WALNUT HILL TRANSPORT | | | SCAC4 |
| 103 | WABU | HOYER GMBH | | D | BIC |
| 104 | WABU | HOYER GMBH | | | SCAC4 |
| 105 | WABX | Westinghouse Air Brake Co. | 7/1923 | | NAKINA |
| 106 | WABX | WESTINGHOUSE AIR BRAKE CO. (WABCO) | | | PWRC |
| 107 | WABZ | WTL RAIL CORPORATION | | | PWRC |
| 108 | WABZ | WTL Rail Corporation | | | RSRV |
| 109 | WABZ | WTL RAIL CORPORATION | | | SCAC4 |
| 110 | WAC | World Air Network Co., Ltd. | Callsign: Wing Ace, Name changed to Air Japan Co. Ltd. ICAO designator changed to AJX. ICAO callsign changed to Air Japan | J | AVCODES |
| 111 | WAC | West African Cargo Airlines Sarl | Callsign: Westaf Cargo, | RIM | AVCODES |
| 112 | WAC | West African Cargo Airlines | | | ICAO1 |
| 113 | WACD | WATER SPIRIT FREIGHT | | | SCAC4 |
| 114 | WACF | WALDHEIM COLONY FARMS LTD | | | SCAC4 |
| 115 | WACG | WEST ATLANTIC CARGO LEASING & SERVI | | | SCAC4 |
| 116 | WACH | WASHINGTON CARRIERS INC | | | SCAC4 |
| 117 | WACK | WACEK INC | | | SCAC4 |
| 118 | WACL | WESTCHEM AGRICULTURAL CHEMICALS INC | | | SCAC4 |
| 119 | WACN | WALKER CRANE & RIGGING CORP | | | SCAC4 |
| 120 | WACO | WHITE, A C TRANSFER & | | | SCAC4 |
| 121 | WACQ | WANDERING FIRE POTTERY & TILE WORKS | | | SCAC4 |
| 122 | WACR | Washington County R.R. Corp. | added 4/1981; 1/1994; eliminated 7/1997; 7/2000-7/2005 | | NAKINA |
| 123 | WACR | Washington County R.R. Corp. | added 4/81; 1/94; eliminated 7/97; 7/2000 | | NRHS |
| 124 | WACR | WASHINGTON COUNTY RAILROAD CORPORATION | | | PWRC |
| 125 | WACR | Washington County Railroad | | | RSRV |
| 126 | WACT | WACONIA TRANSPORT COMPANY INC | | | SCAC4 |
| 127 | WACV | WHITE, A C MOVING SYSTEMS INC | | | SCAC4 |
| 128 | WACW | WANDERING ANGUS CELTIC TRADERS | | | SCAC4 |
| 129 | WACX | Albright & Wilson Co. | added 4/1990; 1/1994-7/2000; eliminated 10/2003 | | NAKINA |
| 130 | WACX | PCS Phosphate Co. | added 10/2003; 7/2005 | | NAKINA |
| 131 | WACX | Albright & Wilson Company | added 4/90; 1/94-7/2000 | | NRHS |
| 132 | WACX | *WILLARD AGRICULTURAL COMPANY | | | PWRC |
| 133 | WACX | +PCS PHOSPHATE COMPANY INCORPORATED [ALBRIGHT & WILSON COMPANY] | | | PWRC |
| 134 | WACX | Willard Agricultural Co. (PCS Phosphate) | | | RSRV |
| 135 | WACX | PCS PHOSPHATE COMPANY INC | | | SCAC4 |
| 136 | WAD | Waddington FTU | Callsign: Vulcan, | GB | AVCODES |
| 137 | WAD | Waddington FTU | | | ICAO1 |
| 138 | WADC | WHEELS ASSURED DELIVERY SYSTEMS INC | | | SCAC4 |
| 139 | WADE | WADE ENVIRONMENTAL | | | SCAC4 |
| 140 | WADE | Wade Tours | | USA | TRAFFIC |
| 141 | WADF | WAYNES CUSTOM WOODCRAFT LTD | | | SCAC4 |
| 142 | WADG | WADE TRUCKING INC | | | SCAC4 |
| 143 | WADK | WOLLMANN, ALBERT | | | SCAC4 |
| 144 | WADR | WADDELL TRANSPORT LIMITED | | | SCAC4 |
| 145 | WADS | WADSWORTH&REILLY EXPRESS, INC | | | SCAC1 |
| 146 | WADS | WADSWORTH AND REILLY EXPRESS INC | | | SCAC4 |
| 147 | WADX | The Wadley Co. | 7/1930-7/1932 | | NAKINA |
| 148 | WADX | The Wadley Co. (Harbor Tank Line) | 7/1935 | | NAKINA |
| 149 | WADX | American Refrigerator Transit Co. | added 7/1955; 10/1957-1/1975; eliminated 10/1975; 1/1980 | | NAKINA |
| 150 | WADX | American Refrigerator Transit Co. | added 7/55; 10/57-1/80 | | NRHS |
| 151 | WADX | *WADLEY CO. | | | PWRC |
| 152 | WADX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 153 | WADZ | WATKINS DISTRIBUTION | | | PWRC |
| 154 | WAE | Western Air Express | Callsign: Western Express, | USA | AVCODES |
| 155 | WAE | Western Air Express | | | ICAO1 |
| 156 | WAER | Wabash & Erie R.R. | added 1/1995; eliminated 4/1995; 7/2000-7/2005 | | NAKINA |
| 157 | WAER | Wabash & Erie R.R. | added 1/95; eliminated 4/95; 7/2000 | | NRHS |
| 158 | WAER | WABASH & ERIE RAILROAD | | | PWRC |
| 159 | WAER | Wabash and Erie Railroad | | | RSRV |
| 160 | WAEX | Cherokee Rail Equipment, LLC | 7/2005 (not listed) | | NAKINA |
| 161 | WAEX | CHEROKEE RAIL EQUIPMENT, LLC | | | PWRC |
| 162 | WAF | Flamenco Airways, Inc. | Callsign: Flamenco, Name changed to Air Flamenco | PRI | AVCODES |
| 163 | WAF | Flamenco Airways, Inc. | IATA: FK, Designator FK recalled by IATA | PRI | AVCODES |
| 164 | WAF | Air Flamenco | Callsign: Flamenco, Name changed from Flamenco Airways, Inc. | PRI | AVCODES |
| 165 | WAF | Flamenco Airways | | | ICAO1 |
| 166 | WAFF | WESTERN ALFALFA INC | | | SCAC4 |
| 167 | WAFU | BOCS GMBH | | D | BIC |
| 168 | WAFX | Western Ash Co. | added 1/1997; eliminated 7/1997; 7/2000 (not listed) | | NAKINA |
| 169 | WAFX | Western Ash Co. | added 1/97; eliminated 7/97; 7/2000 | | NRHS |
| 170 | WAFX | WESTERN ASH COMPANY | | | PWRC |
| 171 | WAFX | Western Ash | | | RSRV |
| 172 | WAG | Wisconsin Air National Guard | | USA | AVCODES |
| 173 | WAG | Wisconsin Air National Guard | | | ICAO1 |
| 174 | WAG | Wellsville, Addison & Galeton R.R. Corp. | 10/1957-1/1980; eliminated 4/1980 | | NAKINA |
| 175 | WAG | Wellsville, Addison & Galeton R.R. Corp. | 10/57-1/80; eliminated 4/80 | | NRHS |
| 176 | WAG | WELLSVILLE, ADDISON & GALETON RAILROAD CORP. | | | PWRC |
| 177 | WAG | Wellsville, Addison and Galeton Railroad | | | RSRV |
| 178 | WAG | Wellsville, Addison and Galeton Railroad | | USA | TRAFFIC |
| 179 | WAG | Westfalen Aktiengesellschaft | | DE | VKM |
| 180 | WAGA | AGRA/AUROBON | | | PWRC |
| 181 | WAGH | WEST ATLANTIC LOGISTICS CORP | | | SCAC4 |
| 182 | WAGL | WALGREEN CO | | | SCAC4 |
| 183 | WAGN | WAGNER FREIGHT LINES, INC | | | SCAC1 |
| 184 | WAGN | WAGNER FREIGHT LINES, INC | | | SCAC4 |
| 185 | WAGN | West Anglia Great Northern Railway Ltd. | | GB | TRAFFIC |
| 186 | WAGN | West Anglia Great Northern Railway | | UK | VKM |
| 187 | WAGP | WAGGONERS TRUCKING | | | SCAC1 |
| 188 | WAGP | WAGGONERS TRUCKING, THE | | | SCAC4 |
| 189 | WAGR | WAGLER, LARRY | | | SCAC4 |
| 190 | WAGR | Westrail | | AUS | TRAFFIC |
| 191 | WAGT | WAGNER TRUCKING INC | | | SCAC4 |
| 192 | WAGU | WESTFALEN AG | | D | BIC |
| 193 | WAGU | WESTFALEN AG | | | SCAC4 |
| 194 | WAGX | Occidental Chemical Corp. | added 10/1995; eliminated 4/1996 | | NAKINA |
| 195 | WAGX | PCS Phosphate Co., Inc. | added 4/1996; 7/2000-7/2005 | | NAKINA |
| 196 | WAGX | Occidental Chemical Corp. | added 10/95; eliminated 4/96 | | NRHS |
| 197 | WAGX | PCS Phosphate Co., Inc. | added 4/96; 7/2000 | | NRHS |
| 198 | WAGX | PCS PHOSPHATE COMPANY INC. [OCCIDENTAL CHEMICAL CORP.] | | | PWRC |
| 199 | WAGX | Willard Agricultural Co. (PCS Phosphate) | | | RSRV |
| 200 | WAGX | WHITE SPRINGS AGRICULTURAL CHEMICAL | | | SCAC4 |
