| 3101 | WMSS | WAYNE MOVING & STORAGE INC | | | SCAC4 |
| 3102 | WMSU | WALLENIUS LINES | | | SCAC1 |
| 3103 | WMSU | WALLENIUS LINES | | | SCAC4 |
| 3104 | WMSV | WAINWRIGHT MARINE SERVICES LTD | | | SCAC4 |
| 3105 | WMSZ | Schneider & Schneider GmbH | | DE | VKM |
| 3106 | WMT | Wizz Air Malta Limited | IATA: W4, Callsign: Wizzairmalta, | M | AVCODES |
| 3107 | WMTB | WILLIAMS TRUCKING | | | SCAC4 |
| 3108 | WMTE | WINNIPEG MOTOR EXPRESS INC | | | SCAC4 |
| 3109 | WMTF | WILLIAMS TRANSFER AND STORAGE | | | SCAC4 |
| 3110 | WMTI | WESTMORELAND TRANSPORTATION INC | | | SCAC4 |
| 3111 | WMTJ | WEBER MANUFACTURING TECHNOLOGIES IN | | | SCAC4 |
| 3112 | WMTL | WILLIAMS TANK LINES INC | | | SCAC4 |
| 3113 | WMTN | WILLIAMS TRANSPORTATION SERVICE INC | | | SCAC4 |
| 3114 | WMTP | WILLIAMS TRANSPORTATION AND STORAGE | | | SCAC4 |
| 3115 | WMTQ | WILLIAMS, MIKE TRUCKING LLC | | | SCAC4 |
| 3116 | WMTR | WAYMORE TRANSPORTATION INC | | | SCAC4 |
| 3117 | WMTS | WILLIAMS TRANSPORTATION AND STORAGE | | | SCAC4 |
| 3118 | WMTU | MAREK WOLFGANG TRANSPORTE GMBH | | | SCAC4 |
| 3119 | WMTZ | WAL-MART STORES INC | | | SCAC4 |
| 3120 | WMU | Western Michigan University College of Aviation | Callsign: Skybronco, | USA | AVCODES |
| 3121 | WMWL | WMW LOGISTICS INC | | | SCAC4 |
| 3122 | WMWN | The Weatherford, Mineral Wells and Northwestern Ry. Co. | 1/1975-1/1980 | | NAKINA |
| 3123 | WMWN | The Weatherford, Mineral Wells and Northwestern Ry. Co. | 1/75-1/80 | | NRHS |
| 3124 | WMWN | UP [MISSOURI PACIFIC] [WEATHERFORD MINERAL WELLS & NORTHWESTERN RWY] | | | PWRC |
| 3125 | WMWN | Weatherford, Mineral Wells and Northwestern Railway | | | RSRV |
| 3126 | WMWQ | WACCAMA | | | SCAC4 |
| 3127 | WMWX | WASTE MANAGEMENT OF WISCONSIN | | | PWRC |
| 3128 | WMX | Western Meat Co. | 8/1920-7/1923 | | NAKINA |
| 3129 | WMX | Westmoreland Coal Co. | added 11/1934; 7/1937-1/1945; 1/1946 (not listed) | | NAKINA |
| 3130 | WMX | Westmoreland Coal Co. | Apr-38 | | NRHS |
| 3131 | WMX | WESTMORELAND COAL CO. | | | PWRC |
| 3132 | WMXG | WMX LOGISTICS INC | | | SCAC4 |
| 3133 | WMXN | WILLIAMS, D C TRANSPORTATION LLC | | | SCAC4 |
| 3134 | WMXO | WILLIAMS TRANSPORT | | | SCAC4 |
| 3135 | WMXP | WATROUS MOTOR EXPRESS, INC | | | SCAC1 |
| 3136 | WMXS | WESTERN MARITIME EXPRESS INC | | | SCAC4 |
| 3137 | WMXT | WALTZ, MAX TRUCKING | | | SCAC4 |
| 3138 | WMYR | WIEDMEYE | | | SCAC4 |
| 3139 | WN | Southwest Airlines Co. | ICAO: SWA, Callsign: Southwest, IATA Prefix: 526, | USA | AVCODES |
| 3140 | WN | Partnair | | N | AVCODES |
| 3141 | WN | Western Airways Ltd. | Callsign: Westway, | GB | AVCODES |
| 3142 | WN | Norfly | | N | AVCODES |
| 3143 | WN | Nor-Fly A/S | ICAO: NFC, Callsign: Norship, | N | AVCODES |
| 3144 | WN | Progressive Rail Inc. d/b/a Wisconsin Northern | added 7/2007 | | NAKINA |
| 3145 | WN | PROGRESSIVE RAIL, INC. d/b/a WISCONSIN NORTHERN RAILROAD | | | PWRC |
| 3146 | WN | Wisconsin Northern Railroad | | | RSRV |
| 3147 | WN | WISCONSIN NORTHERN RAILROAD | | | SCAC4 |
| 3148 | WN | Wisconsin Northern | | USA | TRAFFIC |
| 3149 | WNA | Winair, Inc. | Callsign: Winair, | USA | AVCODES |
| 3150 | WNA | Winair | | | ICAO1 |
| 3151 | WNAD | W & A DISTRIBUTION SERVICES INC | | | SCAC4 |
| 3152 | WNAI | WRIST NORTH AMERICA INC | | | SCAC4 |
| 3153 | WNAL | WINAIR LOGISTICS INC | | | SCAC4 |
| 3154 | WNAN | WINANS OIL INC | | | SCAC4 |
| 3155 | WNAP | WHITE, WILLIAM F INTERNATIONAL INC | | | SCAC4 |
| 3156 | WNAR | WARD NORTH AMERICAN | | | SCAC4 |
| 3157 | WNAS | WILLIN' TRANSPORTATION INC | | | SCAC4 |
| 3158 | WNAV | WNS SERVICE INC | | | SCAC4 |
| 3159 | WNB | Württembergische Nebenbahnen AG | | D | TRAFFIC |
| 3160 | WNBF | WINTERS, T C TRUCKING LLC | | | SCAC4 |
| 3161 | WNC | Wenic Air Services | Callsign: Wenic, Ceased operations | SGP | AVCODES |
| 3162 | WNCP | WATRIN CORP | | | SCAC4 |
| 3163 | WNCX | Wabash National Finance Corp. | 7/2000-7/2005 (not listed) | | NAKINA |
| 3164 | WNCX | Wabash National Finance Corp. | Jul-00 | | NRHS |
| 3165 | WNCX | WABASH NATIONAL FINANCE CORP. | | | PWRC |
| 3166 | WNCX | Wabash National Finance Corporation | | | RSRV |
| 3167 | WNCZ | WABASH NATIONAL FINANCE CORPORATION | | | PWRC |
| 3168 | WNCZ | Wabash National Finance Corporation | | | RSRV |
| 3169 | WNCZ | WABASH NATIONAL FINANCE CORPORATION | | | SCAC4 |
| 3170 | WND | Caribbean Winds Airways, Inc. | Callsign: Windy, | AG | AVCODES |
| 3171 | WND | Larry Connor | Callsign: Windancer, | USA | AVCODES |
| 3172 | WNDA | WINDSTAR EXPRESS INC | | | SCAC4 |
| 3173 | WNDF | WINDSOR FUEL CO INC | | | SCAC4 |
| 3174 | WNDI | WINDY ACRES TRUCKING INC | | | SCAC4 |
| 3175 | WNDK | WINDECKER INC | | | SCAC4 |
| 3176 | WNDL | WENDLAND, DAVID ALEXANDER | | | SCAC4 |
| 3177 | WNDP | WIND RIDGE TRUCKING LTD | | | SCAC4 |
| 3178 | WNDR | WONDER SHIPPING LINE INC | | | SCAC4 |
| 3179 | WNDS | WARNER TRUCKING, INC | | | SCAC1 |
| 3180 | WNDS | WINDURE S A DE C V | | | SCAC4 |
| 3181 | WNDU | WND (LIAO NING) HEAVY INDUSTRY CO LTD | | PRC | BIC |
| 3182 | WNDW | WIND WALKER EXPRESS | | | SCAC4 |
| 3183 | WNDX | Relco Rank Line, Inc. | added 1/1991; 1/1994; eliminated 10/1997 | | NAKINA |
| 3184 | WNDX | Relco Rank Line, Inc. | added 1/91; 1/94; eliminated 10/97 | | NRHS |
| 3185 | WNDX | (RTLX) RELCO TANK LINE INC. | | | PWRC |
| 3186 | WNDY | WINDY HILL FOLIAGE, INC. | | | SCAC1 |
| 3187 | WNDY | WINDY HILL FOLIAGE INC | | | SCAC4 |
| 3188 | WNE | Jackson Family Wines | Callsign: Crush, | USA | AVCODES |
| 3189 | WNEE | WINTERS SALVAGE | | | SCAC4 |
| 3190 | WNEL | WILSON, ERNEST L LLC | | | SCAC4 |
| 3191 | WNEQ | WEST & | | | SCAC4 |
| 3192 | WNF | Winfield R.R. Co. | 8/1920-1/1980; eliminated 4/1980 | | NAKINA |
| 3193 | WNF | Winfield R.R. Co. | 4/38-1/80; eliminated 4/80 | | NRHS |
| 3194 | WNF | WINFIELD RAILROAD | | | PWRC |
| 3195 | WNF | Winfield Railroad | | | RSRV |
| 3196 | WNFC | WILSON, NOEL ET FILS S N C | | | SCAC4 |
| 3197 | WNFM | WENDELIN FARM INC | | | SCAC4 |
| 3198 | WNFQ | WRIGHT & FILIPPIS INC | | | SCAC4 |
| 3199 | WNFR | Winifrede R.R. Co. | 1/1975-1/1980; added 7/1980; 1/1994-7/2000; eliminated 10/2000 | | NAKINA |
| 3200 | WNFR | Kanawha Rail Corp. | added 10/2000; 7/2005 | | NAKINA |
