| 1 | WC | Wien Consolidated Airlines Ltd. | Callsign: Wien Consolidated, | USA | AVCODES |
| 2 | WC | Islena de Inversiones S.A. de C.V. d/b/a Islena Airlines | ICAO: ISV, IATA Prefix: 506, Designator WC reinstated by IATA. Founded in 1981. Name changed to Avianca Honduras. | HN | AVCODES |
| 3 | WC | Avianca Honduras | ICAO: ISV, IATA Prefix: 506, Designator WC reinstated by IATA. Founded in 1981. Name changed from Islena de Inversiones S.A. de C.V. d/b/a Islena Airlines | HN | AVCODES |
| 4 | WC | Wisconsin Central Ltd. | added 1/1988; 1/1994-7/2005 | | NAKINA |
| 5 | WC | Wisconsin Central Ltd. | added 1/88; 1/94-7/2000 | | NRHS |
| 6 | WC | CANADIAN NATIONAL RWY. [WISCONSIN CENTRAL RWY.] | | | PWRC |
| 7 | WC | Wisconsin Central Railway (Canadian National Railway) | | | RSRV |
| 8 | WC | WISCONSIN CENTRAL LIMITED | | | SCAC4 |
| 9 | WC | Wisconsin Central Limited | | USA | TRAFFIC |
| 10 | WCA | West Coast Airways Limited | Callsign: West-Leone, | WAL | AVCODES |
| 11 | WCA | West Coast Airways | | | ICAO1 |
| 12 | WCAA | WILLINGHAM CANADA | | | SCAC4 |
| 13 | WCAC | WESTWAY GROUP CANADA INC | | | SCAC4 |
| 14 | WCAF | WINDY CITY CARRIERS INC | | | SCAC4 |
| 15 | WCAI | WCA LOGISTICS LLC | | | SCAC4 |
| 16 | WCAL | WEST COAST AMUSEMENT LTD | | | SCAC4 |
| 17 | WCAM | WOOD CARRIERS INC | | | SCAC4 |
| 18 | WCAP | WILDCAT TRANSPORT SERVICE | | | SCAC4 |
| 19 | WCAQ | WEST CENTRAL AG SERVICES INC | | | SCAC4 |
| 20 | WCAR | WHITACRE, CARROLL E | | | SCAC4 |
| 21 | WCAU | WORLD CONTAINER TRADING GMBH | | | SCAC4 |
| 22 | WCAW | WHITBY TRUCKING | | | SCAC4 |
| 23 | WCAX | Westcan Rail Ltd. | 7/2000-7/2005 (not listed) | | NAKINA |
| 24 | WCAX | Westcan Rail Ltd. | Jul-00 | | NRHS |
| 25 | WCAX | WESTCAN RAIL LTD. | | | PWRC |
| 26 | WCAX | Westcan Rail Limited | | | RSRV |
| 27 | WCAX | WESTCAN RAIL LTD | | | SCAC4 |
| 28 | WCB | West Africa Airlines Ltd. | IATA: WH, Callsign: Kilo Yankee, Ceased operations. | GH | AVCODES |
| 29 | WCB | West Africa Airlines | | | ICAO1 |
| 30 | WCB | Wagon Care | | NL | TRAFFIC |
| 31 | WCB | Wagon Care B.V. | | NL | VKM |
| 32 | WCBD | WEST COAST T & D INC | | | SCAC4 |
| 33 | WCBM | WORTHINGTON COMPANY, THE | | | SCAC4 |
| 34 | WCBQ | WCB TRUCKING INC | | | SCAC4 |
| 35 | WCBR | WOODCOCK BROTHERS | | | SCAC4 |
| 36 | WCBS | WE COVER BUILDINGS | | | SCAC4 |
| 37 | WCBT | WORLD COURIER GROUND | | | SCAC4 |
| 38 | WCBY | WALLACE, BEVERLY L | | | SCAC4 |
| 39 | WCC | Sports Air Travel, Inc. | Callsign: West Coast, | USA | AVCODES |
| 40 | WCC | West Coast Aviation Services, LLC / West Coast Charters | Callsign: West Coast, | USA | AVCODES |
| 41 | WCC | Sport Air Travel | | | ICAO1 |
| 42 | WCCA | WEST COAST CARRIERS INC | | | SCAC4 |
| 43 | WCCB | WEST COAST CABINETRY (2002) LTD | | | SCAC4 |
| 44 | WCCD | WEST COAST CONTAINER SERVICES INC | | | SCAC4 |
| 45 | WCCE | WESTERN CONTAINER CARRIER INC | | | SCAC4 |
| 46 | WCCJ | WEST COAST TRANSPORT LINES INC | | | SCAC4 |
| 47 | WCCL | Wisconsin Chicago Link Ltd. | added 4/2000; 7/2000-7/2005 | | NAKINA |
| 48 | WCCL | Wisconsin Chicago Link Ltd. | added 4/2000; 7/2000 | | NRHS |
| 49 | WCCL | CANADIAN NATIONAL RWY. [WISCONSIN CHICAGO LINK LTD.; WISCONSIN CENTRAL RWY.] | | | PWRC |
| 50 | WCCL | Wisconsin Central Railway (Canadian National Railway) | | | RSRV |
| 51 | WCCL | WISCONSIN CHICAGO LINK LTD | | | SCAC4 |
| 52 | WCCL | Wisconsin Chicago Link Ltd. | | USA | TRAFFIC |
| 53 | WCCM | WEST COAST COMMODITIES INC | | | SCAC4 |
| 54 | WCCN | WIREGRASS CONSTRUCTION CO INC | | | SCAC4 |
| 55 | WCCO | WESTCOAST CONVERTERS | | | SCAC4 |
| 56 | WCCP | WILLIAM CARTER COMPANY, THE | | | SCAC4 |
| 57 | WCCQ | WHEAT CITY CONCRETE | | | SCAC4 |
| 58 | WCCS | WEST COAST CARRIERS LLC | | | SCAC4 |
| 59 | WCCT | WEST COAST CONNECTIONS INC | | | SCAC4 |
| 60 | WCCU | WEST COAST CLEAN FUELS LLC | | USA | BIC |
| 61 | WCCV | WC COOPER TRUCKING LLC | | | SCAC4 |
| 62 | WCCW | WINKLER CONSUMERS COOPERATIVE LTD | | | SCAC4 |
| 63 | WCCX | Worthington Creamery & Produce Co. | 7/1932 | | NAKINA |
| 64 | WCCX | Worthington Creamery & Produce Co. (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 65 | WCCX | Wannamaker Chemical Co., Inc. | 1/1946 (not listed); 4/1947 | | NAKINA |
| 66 | WCCX | Warren Car Co. | added 10/1957; 10/1957-1/1980; eliminated 10/1982 | | NAKINA |
| 67 | WCCX | Westmoreland Coal Co. | 1/1994 (not listed) | | NAKINA |
| 68 | WCCX | Consolidation Coal Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 69 | WCCX | Warren Car Co. | added 10/57; 10/57-1/80; eliminated 10/82 | | NRHS |
| 70 | WCCX | Westmoreland Coal Co. | Jan-94 | | NRHS |
| 71 | WCCX | Consolidation Coal Co. | added 1/98; 7/2000 | | NRHS |
| 72 | WCCX | *WORTHINGTON CREAMERY & PRODUCE CO. | | | PWRC |
| 73 | WCCX | *WANNAMAKER CHEMICAL CO., INC. | | | PWRC |
| 74 | WCCX | *WARREN CAR COMPANY | | | PWRC |
| 75 | WCCX | *WELLAND CHEMICAL INC. | | | PWRC |
| 76 | WCCX | +CONSOLIDATION COAL COMPANY [WESTMORELAND COAL COMPANY] | | | PWRC |
| 77 | WCCX | Consolidation Coal | | | RSRV |
| 78 | WCCX | RAIL CONNECTION INC | | | SCAC4 |
| 79 | WCCY | WESTERN CONTAINER CORPORATION | | | SCAC4 |
| 80 | WCCZ | WIDOWS CREEK COAL | | | PWRC |
| 81 | WCD | Kyungwoon University | Callsign: White Cloud, | ROK | AVCODES |
| 82 | WCDA | WEST COAST DRIVERS INC | | | SCAC4 |
| 83 | WCDB | WEST COAST DISTRIBUTING INC | | | SCAC4 |
| 84 | WCDC | WISENBAKER CONSTRUCTION COMPANY INC | | | SCAC4 |
| 85 | WCDOT | Westchester County DOT | | USA | TRAFFIC |
| 86 | WCDP | WESCON CEDAR PRODUCTS LTD | | | SCAC4 |
| 87 | WCDT | WEIRD CITY TRUCKING | | | SCAC4 |
| 88 | WCDX | Westcentral Cooperative Grain Co. | added 1/1966; 10/1966; eliminated 10/1968 | | NAKINA |
| 89 | WCDX | Far-Mar-Co., Inc. | added 10/1968; 4/1970-1/1980; eliminated 10/1985 | | NAKINA |
| 90 | WCDX | Farmland Industries, Inc. | 1/1994-7/2000; eliminated 4/2005 | | NAKINA |
| 91 | WCDX | Westcentral Cooperative Grain Co. | added 1/66; 10/66; eliminated 10/68 | | NRHS |
| 92 | WCDX | Far-Mar-Co., Inc. | added 10/68; 4/70-1/80 | | NRHS |
| 93 | WCDX | Farmland Industries, Inc. | 1/94-7/2000 | | NRHS |
| 94 | WCDX | *FARMLAND INDUSTRIES, INC. [FAR-MAR-CO, INC.; WESTCENTRAL COOPERATIVE GRAIN CO.] | | | PWRC |
| 95 | WCDX | *WINE COUNTRY DINNER TRAIN | | | PWRC |
| 96 | WCDX | Westcentral Cooperative Grain (Far-Mar-Co) | | | RSRV |
| 97 | WCDY | WEST COAST DRAYAGE INC | | | SCAC4 |
| 98 | WCE | West Coast Express | | | RSRV |
| 99 | WCE | West Coast Express | City: Vancouver | CDN | TRAFFIC |
| 100 | WCEB | W C ESP INC | | | SCAC4 |
