| 1501 | WESTL | Westfälische Localbahn e.V | | DE | VKM |
| 1502 | WESTM | Westminster Omnibus Company | City: London | GB | TRAFFIC |
| 1503 | WESU | WESTERN GLOBAL HOLDINGS LIMITED | | GB | BIC |
| 1504 | WESU | WESTERN | | | SCAC4 |
| 1505 | WESV | Wes Pro Fleet Services | | | SCAC2 |
| 1506 | WESV | WES PRO FLEET SERVICES INC | | | SCAC4 |
| 1507 | WESX | B.C. Timber Ltd. | added 1/1984; eliminated 7/1984 | | NAKINA |
| 1508 | WESX | Westar Timber Ltd. | added 7/1984; eliminated 7/1986; 1/1994-7/2005 (not listed) | | NAKINA |
| 1509 | WESX | B.C. Timber Ltd. | eliminated 7/84 | | NRHS |
| 1510 | WESX | Westar Timber Ltd. | added 7/84; eliminated 7/86; 1/94-7/2000 | | NRHS |
| 1511 | WESX | WESTAR TIMBER LTD [BC TIMBER, LTD.] | | | PWRC |
| 1512 | WESX | Westar Timber (BC Timber) | | | RSRV |
| 1513 | WESX | Wessex Trains | Wessex Trains was the primary passenger rail operator in the South West of England. The company operated trains in the region bounded by Penzance, Cardiff, Gloucester, Worcester and Brighton. In addition to running trains, Wessex Trains was responsible for the operation of 125 passenger stations. Wessex Trains merged with First Great Western and First Great Western Link on 1 April 2006. The new franchise is operated by First Group and all its services operate under the name First Great Western. | GB | TRAFFIC |
| 1514 | WESXB | Wessex Bus | | GB | TRAFFIC |
| 1515 | WESY | WINNING EAGLE SERVICES INC | | | SCAC4 |
| 1516 | WESZ | WEST ERIE SHORTLINE | | | PWRC |
| 1517 | WET | Flywet, S.A. de C.V. | Callsign: Airwet, | MEX | AVCODES |
| 1518 | WET | Nordic Sky Limited | Callsign: Barefoot, | M | AVCODES |
| 1519 | WETB | WESTERN TOWBOAT COMPANY | | | SCAC4 |
| 1520 | WETC | WESTERN TRANSPORT CO. | | | PWRC |
| 1521 | WETD | WESTDECK CARRIERS LTD | | | SCAC4 |
| 1522 | WETH | WESTHAFER TRUCKING INC | | | SCAC4 |
| 1523 | WETK | WAGNER EXPRESS TRUCKING INC | | | SCAC4 |
| 1524 | WETN | WESTERN EXPRESS TRANSPORTERS INC | | | SCAC4 |
| 1525 | WETR | WHITE EAGLE TRANSPORT INC | | | SCAC4 |
| 1526 | WETU | MOTOR CONTROLS INC. | | USA | BIC |
| 1527 | WETY | WES EGUCHI TRUCKING INC | | | SCAC4 |
| 1528 | WETZ | WEST EAST TRANSPORT COMPANY | | | PWRC |
| 1529 | WETZ | West East Transport | | | RSRV |
| 1530 | WETZ | WEST EAST TRANSPORT COMPANY | | | SCAC4 |
| 1531 | WEUP | WTO EXPRESS (USA) CORP | | | SCAC4 |
| 1532 | WEV | Victoria International Airways Ltd | Callsign: Victoria, | EAU | AVCODES |
| 1533 | WEV | Victoria International Airways | | | ICAO1 |
| 1534 | WEVB | WEVER, BERNARD A. TRUCKING, INC. | | | SCAC1 |
| 1535 | WEVB | WEVER, BERNARD A TRUCKING | | | SCAC4 |
| 1536 | WEVC | WILLIAMS EVENT SERVICES | | | SCAC4 |
| 1537 | WEVH | WEAVER, L G TRUCKING LLC | | | SCAC4 |
| 1538 | WEVL | WESTERN VAN LINES INC | | | SCAC4 |
| 1539 | WEVR | WEVER PETROLEUM INC | | | SCAC4 |
| 1540 | WEVS | WEAVERTOWN TRANSPORT LEASING INC | | | SCAC4 |
| 1541 | WEW | West Wind Aviation, Inc | Callsign: Westwind, | CDN | AVCODES |
| 1542 | WEW | West Wind Aviation | | | ICAO1 |
| 1543 | WEWC | WESTWOOD EXPRESS | | | SCAC4 |
| 1544 | WEWD | WESTWIND ENTERPRISES LLC | | | SCAC4 |
| 1545 | WEWH | WESTERN TRANSPORT INC | | | SCAC4 |
| 1546 | WEWU | THIELMANN WEW GmbH | | D | BIC |
| 1547 | WEX | Wings Express, Inc. | Callsign: Wings Express, | USA | AVCODES |
| 1548 | WEX | Wings Express | | | ICAO1 |
| 1549 | WEXC | WESTERN EXPRESS, INC | | | SCAC1 |
| 1550 | WEXC | WESTERN EXPRESS INC | | | SCAC4 |
| 1551 | WEXF | WORLDWIDE EXPRESS | | | SCAC4 |
| 1552 | WEXH | WENDOVER EXPRESS | | | SCAC4 |
| 1553 | WEXI | WEST END EXPRESS CO INC | | | SCAC4 |
| 1554 | WEXJ | WELLTON EXPRESS INC | | | SCAC4 |
| 1555 | WEXK | WEST EXPRESS TRUCKING | | | SCAC4 |
| 1556 | WEXL | WESTERN ENERGETIX LLC | | | SCAC4 |
| 1557 | WEXO | WESTWIND EXPRESS COURIER, INC. | | | SCAC1 |
| 1558 | WEXO | WESTWIND EXPRESS COURIER | | | SCAC4 |
| 1559 | WEXP | WESTERN MECHANICAL ELECTRICAL MILLW | | | SCAC4 |
| 1560 | WEXQ | WORLD EXPRESS | | | SCAC4 |
| 1561 | WEXR | WESTERN EXPRESS INC | | | SCAC4 |
| 1562 | WEXT | WOODS EXPRESS TRANSPORTATION | | | SCAC4 |
| 1563 | WEXU | WORLD EX LTD | | GE | BIC |
| 1564 | WEXZ | WESTERN EXPRESS INC | | | SCAC4 |
| 1565 | WEYC | WEYERHAUSER COMPANY DIERKS AR DIV. | | | PWRC |
| 1566 | WEYG | WEYCO GROUP INC | | | SCAC4 |
| 1567 | WEYT | Weyerhaeuser Timber Co. | | USA | TRAFFIC |
| 1568 | WEYU | WEYERHAUSER COMPANY | | | PWRC |
| 1569 | WEYU | Weyerhaeuser | | | RSRV |
| 1570 | WEZT | WENDZEL TRANSPORT | | | SCAC4 |
| 1571 | WF | Wideroe's Flyveselskap A/S | ICAO: WIF, Callsign: Wideroe, IATA Prefix: 701, | N | AVCODES |
| 1572 | WF | Wiggins Ferry Co. (East St. Louis Connecting Ry.) | 8/1920 | | NAKINA |
| 1573 | WF | The Wiggins Ferry Co. (Terminal R.R. Association of St. Louis) | 7/1923-7/1930 | | NAKINA |
| 1574 | WF | TERMINAL RAILROAD ASSOCIATION OF ST. LOUIS [EAST ST. LOUIS CONNECTING CO.; WIGGINS FERRY CO.] | | | PWRC |
| 1575 | WF&N | Wichita Falls & Northwestern Ry. | 8/1920 | | NAKINA |
| 1576 | WF&N | Wichita Falls & Northwestern Ry. (M.-K.-T. Lines) | 7/1923-7/1930 | | NAKINA |
| 1577 | WF&N | M-K-T LINES [WICHATA FALLS & NORTHWESTERN RWY.] | | | PWRC |
| 1578 | WFA | Westflug Aachen Luftfahfitgesellschaft mbH | Callsign: Westflug, | D | AVCODES |
| 1579 | WFA | WESTERN FUEL ASSOCIATION | | | PWRC |
| 1580 | WFAF | WIELERS FURNITURE AND FOOD MART LLC | | | SCAC4 |
| 1581 | WFAM | WILLOWDALE FARMS | | | SCAC4 |
| 1582 | WFAR | WHITESTONE FARMS | | | SCAC4 |
| 1583 | WFAX | Western Fuels Association, Inc. | added 4/1979; 1/1980-7/2005 | | NAKINA |
| 1584 | WFAX | Western Fuels Association, Inc. | added 4/79; 1/80-7/2000 | | NRHS |
| 1585 | WFAX | WESTERN FUELS ASSOCIATION, INC. | | | PWRC |
| 1586 | WFAX | Western Fuels Association | | | RSRV |
| 1587 | WFAX | WESTERN FUELS ASSOCIATION, INC. | | | SCAC4 |
| 1588 | WFAX | Western Fuels Association, Inc. | | USA | TRAFFIC |
| 1589 | WFB | Burlington Northern Inc. | added 10/1975; 1/1980; eliminated 4/1981 | | NAKINA |
| 1590 | WFB | Burlington Northern Inc. | 1/80; eliminated 4/81 | | NRHS |
| 1591 | WFB | Westfalenbahn GmbH | Bielefeld | D | privat-bahn.de |
| 1592 | WFB | BURLINGTON NORTHERN INC. | | | PWRC |
| 1593 | WFB | Westfalenbahn | | D | TRAFFIC |
| 1594 | WFB | WestfalenBahn GmbH | | DE | VKM |
| 1595 | WFBN | Wells Fargo Bank Northwest | | USA | TRAFFIC |
| 1596 | WFBX | Western Fruit Express Co. | added 10/1964; 7/1965-1/1975; eliminated 10/1979; 1/1980 | | NAKINA |
| 1597 | WFBX | Western Fruit Express Co. | 7/65-1/80 | | NRHS |
| 1598 | WFBX | WESTERN FRUIT EXPRESS CO. | | | PWRC |
| 1599 | WFC | Swift Copters SA | Callsign: Swiftcopters, | CH | AVCODES |
| 1600 | WFC | Swift Copters | | | ICAO1 |
