| 1 | WN | Southwest Airlines Co. | ICAO: SWA, Callsign: Southwest, IATA Prefix: 526, | USA | AVCODES |
| 2 | WN | Partnair | | N | AVCODES |
| 3 | WN | Western Airways Ltd. | Callsign: Westway, | GB | AVCODES |
| 4 | WN | Norfly | | N | AVCODES |
| 5 | WN | Nor-Fly A/S | ICAO: NFC, Callsign: Norship, | N | AVCODES |
| 6 | WN | Progressive Rail Inc. d/b/a Wisconsin Northern | added 7/2007 | | NAKINA |
| 7 | WN | PROGRESSIVE RAIL, INC. d/b/a WISCONSIN NORTHERN RAILROAD | | | PWRC |
| 8 | WN | Wisconsin Northern Railroad | | | RSRV |
| 9 | WN | WISCONSIN NORTHERN RAILROAD | | | SCAC4 |
| 10 | WN | Wisconsin Northern | | USA | TRAFFIC |
| 11 | WNA | Winair, Inc. | Callsign: Winair, | USA | AVCODES |
| 12 | WNA | Winair | | | ICAO1 |
| 13 | WNAD | W & A DISTRIBUTION SERVICES INC | | | SCAC4 |
| 14 | WNAI | WRIST NORTH AMERICA INC | | | SCAC4 |
| 15 | WNAL | WINAIR LOGISTICS INC | | | SCAC4 |
| 16 | WNAN | WINANS OIL INC | | | SCAC4 |
| 17 | WNAP | WHITE, WILLIAM F INTERNATIONAL INC | | | SCAC4 |
| 18 | WNAR | WARD NORTH AMERICAN | | | SCAC4 |
| 19 | WNAS | WILLIN' TRANSPORTATION INC | | | SCAC4 |
| 20 | WNAV | WNS SERVICE INC | | | SCAC4 |
| 21 | WNB | Württembergische Nebenbahnen AG | | D | TRAFFIC |
| 22 | WNBF | WINTERS, T C TRUCKING LLC | | | SCAC4 |
| 23 | WNC | Wenic Air Services | Callsign: Wenic, Ceased operations | SGP | AVCODES |
| 24 | WNCP | WATRIN CORP | | | SCAC4 |
| 25 | WNCX | Wabash National Finance Corp. | 7/2000-7/2005 (not listed) | | NAKINA |
| 26 | WNCX | Wabash National Finance Corp. | Jul-00 | | NRHS |
| 27 | WNCX | WABASH NATIONAL FINANCE CORP. | | | PWRC |
| 28 | WNCX | Wabash National Finance Corporation | | | RSRV |
| 29 | WNCZ | WABASH NATIONAL FINANCE CORPORATION | | | PWRC |
| 30 | WNCZ | Wabash National Finance Corporation | | | RSRV |
| 31 | WNCZ | WABASH NATIONAL FINANCE CORPORATION | | | SCAC4 |
| 32 | WND | Caribbean Winds Airways, Inc. | Callsign: Windy, | AG | AVCODES |
| 33 | WND | Larry Connor | Callsign: Windancer, | USA | AVCODES |
| 34 | WNDA | WINDSTAR EXPRESS INC | | | SCAC4 |
| 35 | WNDF | WINDSOR FUEL CO INC | | | SCAC4 |
| 36 | WNDI | WINDY ACRES TRUCKING INC | | | SCAC4 |
| 37 | WNDK | WINDECKER INC | | | SCAC4 |
| 38 | WNDL | WENDLAND, DAVID ALEXANDER | | | SCAC4 |
| 39 | WNDP | WIND RIDGE TRUCKING LTD | | | SCAC4 |
| 40 | WNDR | WONDER SHIPPING LINE INC | | | SCAC4 |
| 41 | WNDS | WARNER TRUCKING, INC | | | SCAC1 |
| 42 | WNDS | WINDURE S A DE C V | | | SCAC4 |
| 43 | WNDU | WND (LIAO NING) HEAVY INDUSTRY CO LTD | | PRC | BIC |
| 44 | WNDW | WIND WALKER EXPRESS | | | SCAC4 |
| 45 | WNDX | Relco Rank Line, Inc. | added 1/1991; 1/1994; eliminated 10/1997 | | NAKINA |
| 46 | WNDX | Relco Rank Line, Inc. | added 1/91; 1/94; eliminated 10/97 | | NRHS |
| 47 | WNDX | (RTLX) RELCO TANK LINE INC. | | | PWRC |
| 48 | WNDY | WINDY HILL FOLIAGE, INC. | | | SCAC1 |
| 49 | WNDY | WINDY HILL FOLIAGE INC | | | SCAC4 |
| 50 | WNE | Jackson Family Wines | Callsign: Crush, | USA | AVCODES |
| 51 | WNEE | WINTERS SALVAGE | | | SCAC4 |
| 52 | WNEL | WILSON, ERNEST L LLC | | | SCAC4 |
| 53 | WNEQ | WEST & | | | SCAC4 |
| 54 | WNF | Winfield R.R. Co. | 8/1920-1/1980; eliminated 4/1980 | | NAKINA |
| 55 | WNF | Winfield R.R. Co. | 4/38-1/80; eliminated 4/80 | | NRHS |
| 56 | WNF | WINFIELD RAILROAD | | | PWRC |
| 57 | WNF | Winfield Railroad | | | RSRV |
| 58 | WNFC | WILSON, NOEL ET FILS S N C | | | SCAC4 |
| 59 | WNFM | WENDELIN FARM INC | | | SCAC4 |
| 60 | WNFQ | WRIGHT & FILIPPIS INC | | | SCAC4 |
| 61 | WNFR | Winifrede R.R. Co. | 1/1975-1/1980; added 7/1980; 1/1994-7/2000; eliminated 10/2000 | | NAKINA |
| 62 | WNFR | Kanawha Rail Corp. | added 10/2000; 7/2005 | | NAKINA |
| 63 | WNFR | Winifrede R.R. Co. | 1/75-1/80; added 7/80; 1/94-7/2000; eliminated 10/2000 | | NRHS |
| 64 | WNFR | Kanawha Rail Corp. | added 10/2000 | | NRHS |
| 65 | WNFR | KANAWHA RAIL CORP. [WINIFREDE RAILROAD CO.] | | | PWRC |
| 66 | WNFR | Winnifrede Railroad | | | RSRV |
| 67 | WNFR | KANAWHA RAIL CORP | | | SCAC4 |
| 68 | WNG | Wing Airways (Pty) Ltd. | Callsign: Wing Air, | ZA | AVCODES |
| 69 | WNGB | WING BRIDGE SHIPPING COMPANY | | | SCAC1 |
| 70 | WNGB | WING BRIDGE SHIPPING CO | | | SCAC4 |
| 71 | WNGC | WINGARD, CARL INC | | | SCAC4 |
| 72 | WNGE | WHITE NIGHT EXPRESS | | | SCAC4 |
| 73 | WNGG | WINGS TRUCKING COMPANY INC | | | SCAC4 |
| 74 | WNGR | WENGER CORPORATION, THE | | | SCAC4 |
| 75 | WNGT | WINGS BROKERAGE INC | | | SCAC4 |
| 76 | WNGU | WNG CONTAINER SERVICE CO LIMITED | | PRC | BIC |
| 77 | WNGW | WINGS WORLDWIDE LLC | | | SCAC4 |
| 78 | WNGX | Western Natural Gas Co. | added 4/1975; 1/1980-1/1994; eliminated 10/1996; 7/2000-7/2005 (not listed) | | NAKINA |
| 79 | WNGX | Western Natural Gas Co. | added 4/75; 1/80-1/94; eliminated 10/96; 7/2000 | | NRHS |
| 80 | WNGX | WESTERN NATURAL GAS CO. | | | PWRC |
| 81 | WNGX | Western Natural Gas | | | RSRV |
| 82 | WNGX | WESTERN NATURAL GAS CO. | | | SCAC4 |
| 83 | WNI | Weathernews, Inc. | | J | AVCODES |
| 84 | WNIB | WESTERBERG, NELSON INTERNATIONAL IN | | | SCAC4 |
| 85 | WNJN | WINJEAN TRUCKING CO INC | | | SCAC4 |
| 86 | WNKC | WINKLER CANVAS LTD | | | SCAC4 |
| 87 | WNKH | WILSON TRUCKING LLC | | | SCAC4 |
| 88 | WNKN | WESTERN TRUCKING INC | | | SCAC4 |
| 89 | WNKQ | WAYNE TRUCKING CORP INC | | | SCAC4 |
| 90 | WNKR | WINKLER TRUCKING INC | | | SCAC4 |
| 91 | WNLA | WABASH NATIONAL LP | | | SCAC4 |
| 92 | WNLC | WORDEN LLC | | | SCAC4 |
| 93 | WNLI | WESTERN LOGISTICS INC | | | SCAC4 |
| 94 | WNLT | WNL TRANSPORTATION LLC | | | SCAC4 |
| 95 | WNLY | WILSON, NANCEE L | | | SCAC4 |
| 96 | WNO | WARTON & NORTHERN RR | | | PWRC |
| 97 | WNON | WINSTON TRANSPORTATION SERVICES INC | | | SCAC4 |
| 98 | WNPD | WEN-PARKER LOGISTICS INC | | | SCAC4 |
| 99 | WNR | Wondair On Demand Aviation S.L. | Callsign: Wondair, | E | AVCODES |
| 100 | WNR | Wondair on Demand Aviation | | | ICAO1 |
