| 1 | SKC | Skymaster Air Lines Ltda | Callsign: Skymaster Air, Established on 30 November 1995 and started operations in 1997. Ceased operations. | BR | AVCODES |
| 2 | SKC | Skymaster Air Lines | | | ICAO1 |
| 3 | SKCB | SENKO CO LTD | | | SCAC4 |
| 4 | SKCC | SCHECKLA, CRAIG LLC | | | SCAC4 |
| 5 | SKCE | STARLINK CONSOLIDATION SERVICE | | | SCAC4 |
| 6 | SKCF | SITKA COURIER LLC | | | SCAC4 |
| 7 | SKCG | STRICKLAND OIL CO INC | | | SCAC4 |
| 8 | SKCI | SKIERS CHOICE INC | | | SCAC4 |
| 9 | SKCJ | SKYTRUCK CONTAINER LINES | | | SCAC4 |
| 10 | SKCO | SRA KARTING INTERNATIONAL | | | SCAC4 |
| 11 | SKCQ | STICKY MEDIA INC | | | SCAC4 |
| 12 | SKCR | SKY COURIER NETWORK | | | SCAC4 |
| 13 | SKCU | MAMMOET EUROPE BV | | NL | BIC |
| 14 | SKCU | ALE HEAVYLIFT LIMITED | | | SCAC4 |
| 15 | SKCW | SOFILINK CONTINENTAL INC | | | SCAC4 |
| 16 | SKCX | Spartan Co-operative Creamery Co. (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 17 | SKCX | Sinclair-Koppers Co. | added 1/1968; 4/1970; eliminated 1/1974 | | NAKINA |
| 18 | SKCX | Arco Polymers, Inc. | added 1/1974; eliminated 10/1974 | | NAKINA |
| 19 | SKCX | ARCO/Polymers, Inc. | added 10/1974; 1/1975; eliminated 10/1979 | | NAKINA |
| 20 | SKCX | ARCO Polymers, Inc. | added 10/1979; 1/1980; eliminated 10/1982 | | NAKINA |
| 21 | SKCX | ARCO Chemical Co. | added 10/1982; eliminated 1/1984; 1/1994-7/2005 (not listed) | | NAKINA |
| 22 | SKCX | Sinclair-Koppers Co. | added 1/68; 4/70 | | NRHS |
| 23 | SKCX | ARCO Polymers, Inc. | 1/75-1/80; eliminated 10/82 | | NRHS |
| 24 | SKCX | ARCO Chemical Co. | added 10/82; 1/94-7/2000 | | NRHS |
| 25 | SKCX | ARCO CHEMICAL CO. [SINCLAIR-KOPPERS CO.] | | | PWRC |
| 26 | SKCX | ARCO Chemical | | | RSRV |
| 27 | SKCY | SKY COUNTRY TRANSPORTATION SERVICES | | | SCAC4 |
