| 1 | WR | Royal Tongan Airlines | ICAO: HRH, Callsign: Tonga Royal, IATA Prefix: 971, Ceased operatioins | TO | AVCODES |
| 2 | WR | Aviaprad, Joint-Stock Company | ICAO: VID, Callsign: Aviaprad, Founded in 1996. Ceased operations on 05 February 2008. | RUS | AVCODES |
| 3 | WR | Westjet Encore Ltd. | ICAO: WEN, Callsign: Encore, Commenced operations on 24 June 2013. | CDN | AVCODES |
| 4 | WR | Wincanton Rail GmbH | St. Ingbert | D | privat-bahn.de |
| 5 | WR | WHIPPANY RIVER | | | PWRC |
| 6 | WR | Westrail | | AUS | TRAFFIC |
| 7 | WRA | White River Air Services Ltd. | | CDN | AVCODES |
| 8 | WRA | White River Air Services | | | ICAO1 |
| 9 | WRA | CSX TRANSPORTATION [SEABOARD SYSTEM; WESTERN RAILWAY OF ALABAMA] | | | PWRC |
| 10 | WRA | Western Railway of Alabama (CSX Transportation) | | | RSRV |
| 11 | WRA | Western Railway of Alabama | | USA | TRAFFIC |
| 12 | WRAA | WILLIAMS, R A & SONS | | | SCAC4 |
| 13 | WRAB | WESTGATE, RICHARD TRUCKING | | | SCAC4 |
| 14 | WRAC | WRIGHT, A C TRUCKING INC | | | SCAC4 |
| 15 | WRAE | WILLIAMS, R TRUCKING | | | SCAC4 |
| 16 | WRAF | WRIGHTS RAINBOWS | | | SCAC4 |
| 17 | WRAI | WESTAR INC | | | SCAC4 |
| 18 | WRAJ | WEST, R A INTERNATIONAL INC | | | SCAC4 |
| 19 | WRAK | WARACK TRUCKING | | | SCAC4 |
| 20 | WRAM | WU, RAMON | | | SCAC4 |
| 21 | WRAS | WRIGHT AIR SERVICE INC (AIR CODE 8V | | | SCAC4 |
| 22 | WRAX | The Wine Railway Appliance Co. | 7/1930-1/1941 | | NAKINA |
| 23 | WRAX | The Wine Railway Appliance Co. | Apr-38 | | NRHS |
| 24 | WRAX | *WINE RAILWAY APPLIANCE CO. | | | PWRC |
| 25 | WRAX | *WESTERN RAIL SWITCHING | | | PWRC |
| 26 | WRAY | WILLIAMS, RAY TRUCKING | | | SCAC4 |
| 27 | WRBH | WERNER ENTERPRISES INC (DEDICATED B | | | SCAC4 |
| 28 | WRBO | WARRIOR BOATS | | | SCAC4 |
| 29 | WRBS | WRIGHT BROTHERS TRUCKING INC | | | SCAC4 |
| 30 | WRBX | W.R. Bonsal Co. | added 4/1968; 4/1970; eliminated 4/1971 | | NAKINA |
| 31 | WRBX | W.R. Bonsal Co. | added 4/68; 4/70; eliminated 4/71 | | NRHS |
| 32 | WRBX | W. R. BONSAL CO. | | | PWRC |
| 33 | WRC | Wind Rose Aviation Company Ltd t/a WINDROSE Airlines | IATA: 7W, Callsign: Wind Rose, IATA designator changed to 7W. | UA | AVCODES |
| 34 | WRC | Wind Rose Aviation Company Ltd t/a WINDROSE Airlines | IATA: 7W, Callsign: Wind Rose, IATA designator changed from 7W*. | UA | AVCODES |
| 35 | WRC | WOLFEBORO RAILROAD CO. | | | PWRC |
| 36 | WRCA | WEST RACE CARS | | | SCAC4 |
| 37 | WRCC | WINNIPESAUKEE RAILROAD CORP. | | | PWRC |
| 38 | WRCE | WESTGATE RV CENTRE LTD | | | SCAC4 |
| 39 | WRCG | WRC LOGISTICS INC | | | SCAC4 |
| 40 | WRCI | WOOLLEY TRUCKING LLC | | | SCAC4 |
| 41 | WRCK | WONDRACK DISTRIBUTING INC | | | SCAC4 |
| 42 | WRCL | WHITE ROCK COURIER LTD | | | SCAC4 |
| 43 | WRCP | WHITE RIVER CO-OP | | | SCAC4 |
| 44 | WRCR | WTL RAIL CORPORATION | | | SCAC4 |
| 45 | WRCS | WISCONSIN RIVER CO-OP SERVICES | | | SCAC4 |
| 46 | WRCT | WARCO TRANSPORTATION INC | | | SCAC4 |
| 47 | WRCU | PCA-PEUGEOT CITROEN AUTOMOBILES | | | SCAC4 |
| 48 | WRCX | Warren Refining Co. | 8/1920-7/1923 | | NAKINA |
| 49 | WRCX | Warren Refining Co. (Refiners Car Corp.) | 7/1930 | | NAKINA |
| 50 | WRCX | Wisconsin Rendering Co., Inc. | 1/1946-4/1970; eliminated 1/1971 | | NAKINA |
| 51 | WRCX | Wisconsin Rendering Co., Inc. | 1/52-4/70; eliminated 1/71 | | NRHS |
| 52 | WRCX | *REFINERS CAR CORP. (WARREN REFINING CO.) | | | PWRC |
| 53 | WRCX | *WISCONSIN RENDERING CO., INC. | | | PWRC |
| 54 | WRCX | WRCX COMPANY | | | SCAC4 |
| 55 | WRD | World Airlines Limited | IATA: W2, Callsign: Eclipse, Ceased operations | GB | AVCODES |
| 56 | WRDE | WEITNAUER DUTY FREE | | | SCAC4 |
| 57 | WRDF | WESTERN ROAD DISTRIBUTION INC | | | SCAC4 |
| 58 | WRDG | WARD TRUCKING | | | SCAC4 |
| 59 | WRDL | WORLDLINQ LOGISTIC SYSTEMS LLC | | | SCAC4 |
| 60 | WRDM | WARD, MARVIN TRUCKING INC | | | SCAC4 |
| 61 | WRDR | WORDEN COMPANY, THE | | | SCAC4 |
| 62 | WRDS | WESTERN REGIONAL DELIVERY SERVICE | | | SCAC4 |
| 63 | WRDT | WARD, THOMAS WHOLESALE HAY & STRAW | | | SCAC4 |
| 64 | WRDV | WESTERN REGIONAL DELIVERY SERVICE ( | | | SCAC4 |
| 65 | WRDX | Ward Tank Car Line | 7/1930-4/1938 | | NAKINA |
| 66 | WRDX | Ward Tank Line | 1/1941 | | NAKINA |
| 67 | WRDX | Ward Tank Line (Mrs. W.J. Ward, owner) | 1/1943 | | NAKINA |
| 68 | WRDX | Wyodak Resources Development Corp. | added 1/1980; 1/1980; eliminated 10/1982 | | NAKINA |
| 69 | WRDX | Iowa-Illinois Gas & Electric Co. | added 10/1982; eliminated 7/1983 | | NAKINA |
| 70 | WRDX | Iowa-Gas & Electric Co. | added 10/1983; 1/1994 | | NAKINA |
| 71 | WRDX | Iowa-Illinois Gas & Electric Co. | eliminated 4/1996 | | NAKINA |
| 72 | WRDX | MidAmerican Energy Co. | added 4/1996; 7/2000-7/2005 | | NAKINA |
| 73 | WRDX | Ward Tank Car Line | Apr-38 | | NRHS |
| 74 | WRDX | Wyodak Resources Development Corp. | added 1/80; 1/80; eliminated 10/82 | | NRHS |
| 75 | WRDX | Iowa-Illinois Gas & Electric Co. | added 10/82 | | NRHS |
| 76 | WRDX | Iowa-Gas & Electric Co. | added 10/83; 1/94 | | NRHS |
| 77 | WRDX | Iowa-Illinois Gas & Electric Co. | eliminated 4/96 | | NRHS |
| 78 | WRDX | MidAmerican Energy Co. | added 4/96; 7/2000 | | NRHS |
| 79 | WRDX | *WARD TANK LINE | | | PWRC |
| 80 | WRDX | *WYODAKE RESOURCES DEVELOPMENT CORP. | | | PWRC |
| 81 | WRDX | +MIDAMERICAN ENERGY COMPANY [IOWA-ILLINOIS GAS & ELECTRIC CO.] | | | PWRC |
| 82 | WRDX | Iowa-Illinois Gas and Electric (MidAmerican Energy) | | | RSRV |
| 83 | WRDZ | WYODAKE RESOURCES DEVELOPMENT CORP. | | | PWRC |
| 84 | WREA | WARREN TRUCKING INC | | | SCAC4 |
| 85 | WREC | WAMEGO RECYCLING | | | SCAC4 |
| 86 | WREE | WILLYS RECYCLE | | | SCAC4 |
| 87 | WREH | WAGNER, REINHART | | | SCAC4 |
| 88 | WREL | WILBUR-ELLIS COMPANY | | | SCAC4 |
| 89 | WRER | WILLOW RANGE ENTERPRISES | | | SCAC4 |
| 90 | WREX | Western Railroad Equipment Co. | added 1/1999; 7/2000-7/2005 | | NAKINA |
| 91 | WREX | Western Railroad Equipment Co. | added 1/99; 7/2000 | | NRHS |
| 92 | WREX | WESTERN REFRIGERATOR EXPRESS [WESTERN RAILROAD EQUIPMENT COMPANY] | | | PWRC |
| 93 | WREX | Western Refrigerator Express | | | RSRV |
| 94 | WREX | WESTERN RAILROAD EQUIPMENT COMPANY | | | SCAC4 |
| 95 | WREY | WORLEY TRANSPORTATION INC | | | SCAC4 |
| 96 | WREZ | WESTERN RAILROAD EQUIPMENT COMPANY | | | SCAC4 |
| 97 | WRF | Wright Air Service, Inc. | IATA: 8V, Callsign: Wright Flyer, | USA | AVCODES |
| 98 | WRF | Wright Air Service | IATA: 8V | | ICAO1 |
| 99 | WRFA | WEAVER FARMS | | | SCAC4 |
| 100 | WRFB | WESTERN RESERVE FARM COOPERATIVE IN | | | SCAC4 |
