| 1 | WSP | WorldSpan | IATA: 1P, Computer Reservation System | USA | AVCODES |
| 2 | WSP | Travelport d/b/a WorldSpan | IATA: 1P, Computer Reservation System | USA | AVCODES |
| 3 | WSP | VeriJet, Inc. | Callsign: Whisper Jet, | USA | AVCODES |
| 4 | WSPA | WIND SPIRIT ART AND GALLERY | | | SCAC4 |
| 5 | WSPB | WHITE STALLION PRODUCTIONS INC | | | SCAC4 |
| 6 | WSPD | WASP TRANSPORT INC | | | SCAC4 |
| 7 | WSPG | WILLIAMS, SHUMAKER PC | | | SCAC4 |
| 8 | WSPI | WESTERN STATES PROPERTIES INC. | | | PWRC |
| 9 | WSPI | WILLIAMS SHOW PRODUCTIONS INC | | | SCAC4 |
| 10 | WSPL | WESTERN EQUIPMENT LIMITED | | | SCAC4 |
| 11 | WSPN | WESTPORT EXPRESS INC | | | SCAC4 |
| 12 | WSPO | Werkspoor: Nederlandsche Fabriek van Werktuigen en Spoorwegmaterieel | | NL | TRAFFIC |
| 13 | WSPS | WHOLESALE PRODUCE SUPPLY LLC | | | SCAC4 |
| 14 | WSPW | WELLARD SHIPS PTE LTD | | | SCAC4 |
| 15 | WSPX | Wheelstar Corp. | 1/1994-7/2005 (not listed) | | NAKINA |
| 16 | WSPX | Wheelstar Corp. | 1/94-7/2000 | | NRHS |
| 17 | WSPX | WHEELSTAR CORP. | | | PWRC |
| 18 | WSPX | Wheelstar Corporation | | | RSRV |
| 19 | WSPX | WHEELSTAR CORP. | | | SCAC4 |
| 20 | WSPY | WHITE STAR PUMP COMPANY LTD | | | SCAC4 |
