| 1 | WEC | Universal Airlines, Inc. | Callsign: Airgo, | USA | AVCODES |
| 2 | WEC | Universal Airlines | | | ICAO1 |
| 3 | WEC | WALKER ESTATE CORP., A. T. | | | PWRC |
| 4 | WECC | W E C LINES B V | | | SCAC4 |
| 5 | WECD | WEIDA FREIGHT SYSTEM CO LTD | | | SCAC4 |
| 6 | WECG | WEBERS DE BAJA CALIFORNIA SA DE CV | | | SCAC4 |
| 7 | WECK | WECKERLY FARMS | | | SCAC4 |
| 8 | WECL | WESCO OIL INC | | | SCAC4 |
| 9 | WECM | WEST COAST MILL SUPPLIES INC | | | SCAC4 |
| 10 | WECN | WILSON EURO CARRIERS AS | | | SCAC4 |
| 11 | WECO | WELLCO TANK TRUCKS INC | | | SCAC4 |
| 12 | WECP | WEBER, BOB INC | | | SCAC4 |
| 13 | WECU | WEC LINES BV | | NL | BIC |
| 14 | WECU | WEC LINES | | | SCAC4 |
| 15 | WECX | Westinghouse Electric Corp. | 1/1952-7/2005; eliminated 1/2009/TD> | | NAKINA |
| 16 | WECX | Westinghouse Electric Corp. | 1/52-7/2000 | | NRHS |
| 17 | WECX | WESTINGHOUSE ELECTRIC CORP. | | | PWRC |
| 18 | WECX | Westinghouse Electric Corporation | | | RSRV |
| 19 | WECY | WILES ENTERPRISES CO INC | | | SCAC4 |
| 20 | WECZ | WESTERN CONSTRUCTION COMPANY | | | PWRC |
