| 1 | CWS | Air Swazi Cargo (Pty) Ltd. | Callsign: Swazi Cargo, Ceased operations. ICAO designator changed from ZSC | SD | AVCODES |
| 2 | CWS | Cretan Wings | Callsign: Cretan, Established in January 2018. | GR | AVCODES |
| 3 | CWSA | CROSSROADS WEST AUTO TRANSPORT INC | | | SCAC3 |
| 4 | CWSA | CLEAR WATER SHIPPING INC | | | SCAC4 |
| 5 | CWSB | CAROLINA WHOLESALE BAIT | | | SCAC3 |
| 6 | CWSC | CAPITAL WEST & SOUTH | | | SCAC3 |
| 7 | CWSC | CHARTWORLD SHIPPING CORPORATION | | | SCAC4 |
| 8 | CWSE | CON-WAY SOUTHERN EXPRESS INC | | | SCAC3 |
| 9 | CWSE | CON-WAY FREIGHT SOUTHERN (DIV OF CO | | | SCAC4 |
| 10 | CWSG | COLORADO WESTERN STAGES INC | | | SCAC3 |
| 11 | CWSG | CROWN SHIPPING LTD | | | SCAC4 |
| 12 | CWSH | CRAIN WALNUT SHELLING INC | | | SCAC4 |
| 13 | CWSI | C W S INC | | | SCAC3 |
| 14 | CWSJ | COMMUNITY WASTE SOLUTIONS | | | SCAC4 |
| 15 | CWSK | CLARK, WALTER S & SONS INC | | | SCAC4 |
| 16 | CWSL | CARIBOO WEST STAGES LTD | | | SCAC3 |
| 17 | CWSL | COLUMBUS WHOLESALE FISHBAIT INC | | | SCAC4 |
| 18 | CWSM | CHEMICAL WASTE MANAGEMENT INC | | | SCAC3 |
| 19 | CWSN | CLAWSON, T K INC | | | SCAC3 |
| 20 | CWSN | CONTRACT WAREHOUSE ASSOCIATES INC | | | SCAC4 |
| 21 | CWSO | CHRISTIAN, W & SON | | | SCAC3 |
| 22 | CWSO | CONWEST TRANSPORT LTD | | | SCAC4 |
| 23 | CWSP | CHISWELL SHIPPING LTD. | | | SCAC3 |
| 24 | CWSQ | CWS LOGISTICS LTD | | | SCAC4 |
| 25 | CWSR | CENTRAL WEST MOTOR STAGES INC | | | SCAC3 |
| 26 | CWSS | COSCO WALLEM SHIP MANAGEMENT CO LTD | | | SCAC4 |
| 27 | CWST | CAL WESTERN SHIPPERS | | | SCAC3 |
| 28 | CWSU | GCATAINER BV | | NL | BIC |
| 29 | CWSU | GCATAINER BV | | | SCAC4 |
| 30 | CWSW | CON-WAY SOUTHWEST EXPRESS INC | | | SCAC3 |
| 31 | CWSW | CON-WAY SOUTHWEST EXPRESS INC | | | SCAC4 |
| 32 | CWSX | Cardella Waste Service of New Jersey | 7/2005 (not listed) | | NAKINA |
| 33 | CWSX | USS-Posco Industries | added 1/1987; eliminated 4/1990 | | NAKINA |
| 34 | CWSX | USS Fabrication Division United States Steel Corp. | added 10/1981; eliminated 1/1987 | | NAKINA |
| 35 | CWSX | American Bridge Division United States Steel Corp. | added 7/1964; 7/1965-1/1980; eliminated 10/1981 | | NAKINA |
| 36 | CWSX | Consolidation Western Steel Division, United States Steel Corp. | added 1/1964; eliminated 7/1964 | | NAKINA |
| 37 | CWSX | Department of the Army, Transportation Supply and Maintenance Command, St. Louis 1, Missouri | added 10/1955; eliminated 10/1956 | | NAKINA |
| 38 | CWSX | Department of the Army, Transportation Materiel Command, Marietta, Pennsylvania | eliminated 10/1955 | | NAKINA |
| 39 | CWSX | Department of the Army, Office of the Chief of Transportation, Railway Transport Division | 1/1950-1/1952 | | NAKINA |
| 40 | CWSX | Department of the Army | added 7/1953 | | NAKINA |
| 41 | CWSX | Department of the Army, Office of the Chief of Transportation, Movements Division, Tank Car Section | 1/1950-1/1952 | | NAKINA |
| 42 | CWSX | War Department, U.S.A., Office of Chief of Transportation | 1/1945-4/1947 | | NAKINA |
| 43 | CWSX | War Department, U.S.A., Chemical Warfare Service, Huntsville Arsenal | 1/1943 | | NAKINA |
| 44 | CWSX | Department of the Army, Office of the Chief of Transportation, Movements Division, Tank Car Section | Jan-52 | | NRHS |
| 45 | CWSX | Consolidation Western Steel Division, United States Steel Corp. | eliminated 7/64 | | NRHS |
| 46 | CWSX | American Bridge Division United States Steel Corp. | added 7/64; 7/65-1/80; eliminated 10/81 | | NRHS |
| 47 | CWSX | USS Fabrication Division United States Steel Corp. | added 10/81; eliminated 1/87 | | NRHS |
| 48 | CWSX | USS-Posco Industries | added 1/87; eliminated 4/90 | | NRHS |
| 49 | CWSX | *DEPARTMENT OF THE ARMY | | | PWRC |
| 50 | CWSX | *USS FABRICATION DIVISION (US STEEL CORP.) | | | PWRC |
| 51 | CWSX | +CARDELLA WASTE SERVICE OF NEW JERSEY | | | PWRC |
| 52 | CWSX | United States Steel Corporation (Cardella Waste Service of New Jersey) | | | RSRV |
| 53 | CWSX | AMERICAN BRIDGE DIV US STEEL CORP | | | SCAC3 |
