| 1 | WB | Servicios Aereos Nacionales (SAN), S.A. | ICAO: SAN, Callsign: Aereos, Founded in 1964. Ceased operations in 1999. | EC | AVCODES |
| 2 | WB | Rwandair Express | ICAO: RWD, Callsign: Rwandair, Commenced operations on 01 December 2002. IATA code changed to WB | RWA | AVCODES |
| 3 | WB | Rwandair Express | ICAO: RWD, Callsign: Rwandair, Commenced operations on 01 December 2002. Name changed to RwandAir Limited in March 2009. IATA code changed from WB* | RWA | AVCODES |
| 4 | WB | RwandAir Limited | ICAO: RWD, Callsign: Rwandair, Commence operation on 01 December 2002. Name changed from Rwandair Express in March 2009. IATA code changed from WB* | RWA | AVCODES |
| 5 | WB | Weserbahn | Bremen | D | privat-bahn.de |
| 6 | WB | WiehltalBahn GmbH | Wiehl | D | privat-bahn.de |
| 7 | WB | Waldenburgerbahn | | CH | TRAFFIC |
| 8 | WB | Wales& Borders Trains | | UK | VKM |
| 9 | WB&A | Washington, Baltimore and Annapolis Electric R.R. Co. | 7/1923-7/1935 | | NAKINA |
| 10 | WB&A | WASHINGTON, BALTIMORE & ANNAPOLIS ELECTRIC RAILROAD CO. | | | PWRC |
| 11 | WBA | Etela-Pohjanmaan Lentokeskus Oy (West Bird Aviation) | IATA: FC, Callsign: Westbird, | FIN | AVCODES |
| 12 | WBA | Finnish Commuter Airlines Oy | IATA: FC, Callsign: Westbird, ICAO designator changed to FCM. ICAO callsign changed to Finncomm. Name changed from Finnish Commuter Airlines Oy dba West Bird Aviation | FIN | AVCODES |
| 13 | WBA | Finnish Commuter Airlines Oy | IATA: FC, Callsign: Westbird, Name changed to Finncomm | FIN | AVCODES |
| 14 | WBA | Air Albatros | Callsign: albajet, Ceased operations. | F | AVCODES |
| 15 | WBA | Finncomm Airlines | IATA: FC | | ICAO1 |
| 16 | WBA | Wadle Bauuternehmung GmbH, Altheim | | DE | VKM |
| 17 | WBAC | WEBSTER, AL CLASSIC CARS | | | SCAC4 |
| 18 | WBAI | WRIGHT BROTHERS AERO INC | | | SCAC4 |
| 19 | WbÄJ | Varberg - Ätran Järnväg | 1911 - 1936 | S | svenska-lok.se |
| 20 | WBAO | WOOD BOYS TRANSPORT | | | SCAC4 |
| 21 | WBAV | WARBELOWS AIR VENTURES INC (AIR COD | | | SCAC4 |
| 22 | WBB | Windbergbahn e.V. | Dresden | D | privat-bahn.de |
| 23 | WBBI | WBB INVESTMENTS LLC | | | SCAC4 |
| 24 | WBBM | WALLACEBURG BOOKBINDING AND MFG CO | | | SCAC4 |
| 25 | WBBQ | WILLIAMSON BROS BAR-B-Q | | | SCAC4 |
| 26 | WBBR | WEBBS TRANSPORTATION CO | | | SCAC4 |
| 27 | WBBS | WISENBAKE | | | SCAC4 |
| 28 | WBC | FTV Aviation, LLC | Callsign: Wabac, | USA | AVCODES |
| 29 | WBC | Wilkes-Barre Connecting R.R. | 1/1975-1/1980 | | NAKINA |
| 30 | WBC | Wilkes-Barre Connecting R.R. | 1/75-1/80 | | NRHS |
| 31 | WBC | WILKES-BARRE CONNECTING RAILROAD | | | PWRC |
| 32 | WBC | Wilkes-Barre Connecting Railroad | | | RSRV |
| 33 | WBC | Wycombe Bus Company | | GB | TRAFFIC |
| 34 | WBCA | WESTERN BULK CARRIERS | | | SCAC1 |
| 35 | WBCG | WBC TRUCKING INC | | | SCAC4 |
| 36 | WBCH | WILGENBUSCH CHAROLAIS | | | SCAC4 |
| 37 | WBCL | WATERLOO BEDDING COMPANY LIMITED | | | SCAC4 |
| 38 | WBCN | W B CONTAINER SERVICE | | | SCAC4 |
| 39 | WBCP | WESTERN BULK CARRIERS AS | | | SCAC4 |
| 40 | WBCQ | WOODRUFF BLOCK COMPANY INC | | | SCAC4 |
| 41 | WBCR | Wabash Central R.R. Corp. | added 7/1998; 7/2000-7/2005 | | NAKINA |
| 42 | WBCR | Wabash Central R.R. Corp. | added 7/98; 7/2000 | | NRHS |
| 43 | WBCR | WABASH CENTRAL RAILROAD | | | PWRC |
| 44 | WBCR | Wabash Central Railroad Corporation | | | RSRV |
| 45 | WBCR | WABASH CENTRAL RAILROAD CORPORATION | | | SCAC4 |
| 46 | WBCS | WESTBANK CONTAINER SERVICES INC (DI | | | SCAC4 |
| 47 | WBCW | WESTWOOD BANANA CO INC | | | SCAC4 |
| 48 | WBCX | Warren Bros. Co. | 8/1920 | | NAKINA |
| 49 | WBCX | Williams Bros. Concrete, Inc. | added 11/1973; 1/1975-1/1980; eliminated 7/1985 | | NAKINA |
| 50 | WBCX | Williams Bros., Inc. | added 7/1985; eliminated 4/1991 | | NAKINA |
| 51 | WBCX | Williams Bros. Division, Blue Circle Inc. | added 4/1991; eliminated 1/1994 | | NAKINA |
| 52 | WBCX | Blue Circle Inc. | added 1/1994; 7/2000-7/2005 | | NAKINA |
| 53 | WBCX | Williams Bros. Concrete, Inc. | added 11/73; 1/75-1/80 | | NRHS |
| 54 | WBCX | Williams Bros., Inc. | eliminated 4/91 | | NRHS |
| 55 | WBCX | Williams Bros. Division, Blue Circle Inc. | added 4/91; eliminated 1/94 | | NRHS |
| 56 | WBCX | Blue Circle Inc. | added 1/94; 7/2000 | | NRHS |
| 57 | WBCX | *WARREN BROS. CO. | | | PWRC |
| 58 | WBCX | +BLUE CIRCLE, INC. [WILLIAMS BROTHERS INC.] | | | PWRC |
| 59 | WBCX | Williams Brothers Concrete | | | RSRV |
| 60 | WBCX | BLUE CIRCLE, INC. | | | SCAC4 |
| 61 | WBDI | WAGNER, B & D NC | | | SCAC4 |
| 62 | WBDN | WEINBERGER, DENNIS | | | SCAC4 |
| 63 | WBDS | WEBER, D S ENTERPRISES LTD | | | SCAC4 |
| 64 | WBDT | WALTER, B & D TRUCKING LTD | | | SCAC4 |
| 65 | WBDV | WIEBE, DAVE TRUCKING | | | SCAC4 |
| 66 | WBEE | W E B | | | SCAC4 |
| 67 | WBEL | WEIBEL, INCORPORATED | | | SCAC1 |
| 68 | WBEN | WEBER ENTERPRISES INC | | | SCAC4 |
| 69 | WBEP | WALLY BEE EXPRESS | | | SCAC4 |
| 70 | WBER | WIEBE, BRIAN | | | SCAC4 |
| 71 | WBEY | WHIDBEY MOVING AND STORAGE INC | | | SCAC4 |
| 72 | WBFL | WHITE BUFFALO SERVICES LLC | | | SCAC4 |
| 73 | WBFM | WEST BEND FARMS LLC | | | SCAC4 |
| 74 | WBFS | WHITE BUFFALO LOGISTICS LLC | | | SCAC4 |
| 75 | WBFT | WHITE BUFFALO TRUCKING INC | | | SCAC4 |
| 76 | WBFU | WINE & BRANDY FACTORY ALLIANCE-1892 | | RUS | BIC |
| 77 | WBFV | WINDING BROOK SERVICES LLC | | | SCAC4 |
| 78 | WBG | WeserBahn GmbH | | DE | VKM |
| 79 | WBGA | WIEBE TRANSPORT | | | SCAC4 |
| 80 | WBHF | WILDE BROTHERS FARMS | | | SCAC4 |
| 81 | WBHS | WESTBANK HARBOR SERVICE INC | | | SCAC4 |
| 82 | WBHT | WARD BROTHERS TRUCKING | | | SCAC4 |
| 83 | WBIC | WIEDMEYE | | | SCAC4 |
| 84 | WBID | WEIR BROS INC | | | SCAC4 |
| 85 | WBII | WEIGHBRIDGE INDUSTRIES INC | | | SCAC4 |
| 86 | WBIL | WILL BILL EXPRESS INC | | | SCAC4 |
| 87 | WBIN | WATKINS BROTHERS INC | | | SCAC4 |
| 88 | WBIO | Wratislavia – Bio Sp. z o.o. | | PL | VKM |
| 89 | WBIQ | WERDCO BC INC | | | SCAC4 |
| 90 | WBIV | WEBB INVESTMENTS | | | SCAC4 |
| 91 | WBJ | Varberg - Borås Järnväg | 1880 - 1930 | S | svenska-lok.se |
| 92 | WBJG | WOOD BROTHERS-JTG RACING INC | | | SCAC4 |
| 93 | WBJR | WILLIAMS, BRICE JR | | | SCAC4 |
| 94 | WBKC | WESTERN BULK CARRIERS | | | SCAC1 |
| 95 | WBKC | WESTERN BULK CARRIERS (SEATTLE) INC | | | SCAC4 |
| 96 | WBKG | W&B TRUCKING, INC | | | SCAC1 |
| 97 | WBKG | W & B TRUCKING INC | | | SCAC4 |
| 98 | WBKL | WEBER TRUCKING LLC | | | SCAC4 |
| 99 | WBKQ | WESTBROOK VAN & STORAGE COMPANY | | | SCAC4 |
| 100 | WBKS | WESTERN BULK CARRIERS KS | | | SCAC4 |
