| 1 | CWP | Australian Customs Service | | | ICAO1 |
| 2 | CWP | Chicago Rail Link | added 1/1998; 7/2000-7/2005; eliminated 4/2006 | | NAKINA |
| 3 | CWP | Chicago, West Pullman & Southern R.R. Co. | 4/1938-1/1994; eliminated 1/1998 | | NAKINA |
| 4 | CWP | Chicago, West Pullman & Southern R.R. | 7/1923-7/1936 | | NAKINA |
| 5 | CWP | Chicago, West Pullman & Southern R.R. | 23-Jul | | NRHS |
| 6 | CWP | Chicago, West Pullman & Southern R.R. Co. | 4/38-1/94; eliminated 1/98 | | NRHS |
| 7 | CWP | Chicago Rail Link | added 1/98; 7/2000 | | NRHS |
| 8 | CWP | CHICAGO RAIL LINK [CHICAGO, WEST PULLMAN & SOUTHERN RAILROAD] | | | PWRC |
| 9 | CWP | Chicago, West Pullman and Southern Railroad (Chicago Rail Link) | | | RSRV |
| 10 | CWPC | CARSWELL PIPELINE COMPANY | | | SCAC3 |
| 11 | CWPD | CWPD TRUCKING | | | SCAC3 |
| 12 | CWPE | COMMONWEA | | | SCAC4 |
| 13 | CWPF | CROWN PACIFIC (CHINA) LTD | | | SCAC3 |
| 14 | CWPI | CWA TRANSPORT INC | | | SCAC4 |
| 15 | CWPK | CHADWICK TRUCKING INC | | | SCAC3 |
| 16 | CWPK | CAL WESTERN PACKAGING CORP | | | SCAC4 |
| 17 | CWPR | COMBS WHOLESALE PRODUCE COMPANY | | | SCAC3 |
| 18 | CWPR | CWP TRUCKING | | | SCAC4 |
| 19 | CWPS | CROWLEY PETROLEUM SERVICES INC | | | SCAC4 |
| 20 | CWPT | CROWN POINT TRUCKING | | | SCAC3 |
| 21 | CWPX | Consolidated Water Power & Paper Co. | 4/1947-7/1954; eliminated 1/1956 | | NAKINA |
| 22 | CWPX | Consolidated Water Power & Paper Co. | Jan-52 | | NRHS |
| 23 | CWPX | CONSOLIDATED WATER POWER & PAPER CO. | | | PWRC |
| 24 | CWPZ | CONTINENTAL WOOD PRODUCTS | | | PWRC |
