| 1 | WSI | Wind Spirit Air, Inc. | Callsign: Wind Spirit, | USA | AVCODES |
| 2 | WSI | Wind Spirit Air | | | ICAO1 |
| 3 | WSIA | WESTERN SPECIALIZED INC | | | SCAC4 |
| 4 | WSIB | WORLDWIDE SHIPPERS INC | | | SCAC4 |
| 5 | WSIC | WAREHOUSE SPECIALISTS INC | | | SCAC4 |
| 6 | WSID | WESTERN STATES INTERMODAL INC | | | SCAC4 |
| 7 | WSIG | WESTRING INC | | | SCAC4 |
| 8 | WSIJ | WES SCOTT INC | | | SCAC4 |
| 9 | WSIL | WEST INDIES LINES | | | PWRC |
| 10 | WSIN | WINDSOR INDUSTRIAL SERVICES | | | SCAC4 |
| 11 | WSIO | WE STOW INCORPORATED | | | SCAC4 |
| 12 | WSIP | WHALE SHIPPING INC | | | SCAC4 |
| 13 | WSIS | WRIGHTWAY SYSTEMS INC | | | SCAC4 |
| 14 | WSIU | WESOTRA SPEDITION UND TRANSPORT GMB | | | SCAC4 |
| 15 | WSIX | Watco Switching Indiana | 7/2000-7/2005 (not listed) | | NAKINA |
| 16 | WSIX | Watco Switching Indiana | Jul-00 | | NRHS |
| 17 | WSIX | WATCO SWITCHING INDIANA | | | PWRC |
| 18 | WSIX | Watco Switching Indiana | | | RSRV |
| 19 | WSIZ | WSI UNION SEED | | | PWRC |
