| 1 | WCI | Air Care (SW) Ltd. | Callsign: Drake, | GB | AVCODES |
| 2 | WCIC | WINGS CENTURY TRUCKING | | | SCAC4 |
| 3 | WCID | WORLD COURIER INC | | | SCAC4 |
| 4 | WCIE | WELLBORN CABINET INC | | | SCAC4 |
| 5 | WCIF | WAGNER CONSTRUCTION INC | | | SCAC4 |
| 6 | WCII | WESCAST INDUSTRIES INC | | | SCAC4 |
| 7 | WCIK | WINECONSOLIDATORS.C | | | SCAC4 |
| 8 | WCIL | WORLD CARGO INTERNATIONAL SERVICES | | | SCAC4 |
| 9 | WCIM | WORLD WIDE CONTAINERS TRANSPORTATIO | | | SCAC4 |
| 10 | WCIN | WASTE CONTROL INTL | | | SCAC4 |
| 11 | WCIQ | WEAVER CO INC | | | SCAC4 |
| 12 | WCIR | WISE COACHES INCORPORATED | | | SCAC4 |
| 13 | WCIU | TEXTAINER EQUIPMENT MANAGEMENT LTD | | BM | BIC |
| 14 | WCIU | TEXTAINER EQUIPMENT MANAGEMENT LIMI | | | SCAC4 |
| 15 | WCIX | Western Chemical Industries, Ltd. | 1/1945 (not listed); 1/1946-4/1947; added 1/1953; 7/1954; eliminated 4/1957 | | NAKINA |
| 16 | WCIX | Witco Chemical Co. | added 1/1959; eliminated 7/1959 | | NAKINA |
| 17 | WCIX | Witco Chemical Co., Inc. | added 7/1959; 4/1961-10/1966; eliminated 1/1969 | | NAKINA |
| 18 | WCIX | Witco Chemical Corp. | added 1/1969; 4/1970-1/1975; eliminated 4/1976 | | NAKINA |
| 19 | WCIX | Western Chemical Industries, Ltd. | added 1/53; eliminated 4/57 | | NRHS |
| 20 | WCIX | Witco Chemical Co. | added 1/59; eliminated 7/59 | | NRHS |
| 21 | WCIX | Witco Chemical Co., Inc. | added 7/59; 4/61-10/66; eliminated 1/69 | | NRHS |
| 22 | WCIX | Witco Chemical Corp. | added 1/69; 4/70-1/75; eliminated 4/76 | | NRHS |
| 23 | WCIX | WITCO CHEMICAL CORP. [WESTERN CHEMICAL INDUSTRIES, LTD.] | | | PWRC |
| 24 | WCIX | WITCO CHEMICAL CO INC | | | SCAC4 |
| 25 | WCIZ | WOODS COUNTY INDUSTRIAL DEVELOPMENT AUTHORITY | | | PWRC |
