| 2001 | SCVL | SANTA CLARA VALLEY TRANSPORTATION A | | | SCAC4 |
| 2002 | SCVM | STAR COURIER & MESSENGER SERVICE | | | SCAC4 |
| 2003 | SCVN | STOUTS CHARTER SERVICE INC | | | SCAC4 |
| 2004 | SCVQ | SCV FREIGHT INC | | | SCAC4 |
| 2005 | SCVS | SELECT VAN & STORAGE | | | SCAC4 |
| 2006 | SCVT | SEUBERT EXCAVATORS INCORPORATED | | | SCAC4 |
| 2007 | SCVU | SECORA CONTAINERS SP. Z O.O. | | PL | BIC |
| 2008 | SCVU | SCVU | | | PWRC |
| 2009 | SCVW | STOREY TRUCKING COMPANY INC | | | SCAC4 |
| 2010 | SCW | Malmo Aviation AB | IATA: TF, Callsign: Scanwings, Name changed to Braathens Regional Aviation AB. Designator 6E recalled by IATA / Name and ICAO callsign changed. Name changed from Braathens Malmo Aviation AB | S | AVCODES |
| 2011 | SCW | Malmo Aviation AB | IATA: 6E, Callsign: Scanwings, Designator 6E recalled by IATA | S | AVCODES |
| 2012 | SCW | Braathens Malmo Aviation AB | Callsign: Scanwings, Designator 6E recalled by IATA / Name and ICAO callsign changed. Formerly Malmo Aviation / Name reverted to Malmo Aviation AB | S | AVCODES |
| 2013 | SCW | Malmo Aviation AB | Callsign: Scanwings, | S | AVCODES |
| 2014 | SCW | Malmo Aviation AB | IATA: QO, Callsign: Scanwings, IATA designator changed top 6E | S | AVCODES |
| 2015 | SCW | Braathens Regional Aviation AB | IATA: TF, Callsign: Scanwings, Merged into Braathens Regional Airways AB on 18 March 2020. Name changed from Malmo Aviation AB. Designator 6E recalled by IATA / Name and ICAO callsign changed. Name changed from Braathens Malmo Aviation AB | S | AVCODES |
| 2016 | SCW | SkyWest Charter LLC | IATA: CW, Callsign: Charter West, Subsidiary of SkyWest Airlines. | USA | AVCODES |
| 2017 | SCW | MalmA~¶ Aviation | IATA: TF | | ICAO1 |
| 2018 | SCW | Malmo Aviation | | | ICAO1 |
| 2019 | SCWB | Stagecoach Western Buses | | GB | TRAFFIC |
| 2020 | SCWC | SW CATTLE | | | SCAC4 |
| 2021 | SCWF | SCHLOMBS, W INC | | | SCAC4 |
| 2022 | SCWH | SOUTH COAST WAREHOUSING-DISTRIBUTIO | | | SCAC4 |
| 2023 | SCWK | SCHWANKE CO | | | SCAC4 |
| 2024 | SCWP | SINO CROWN TRANSPORTATION LIMITED | | | SCAC4 |
| 2025 | SCWU | J. SCHWARZER GMBH & CO SERVICE KG | | D | BIC |
| 2026 | SCWV | SCHLUMBERGER | | | SCAC4 |
| 2027 | SCWW | SCHEWE, TOM TRUCKING INC | | | SCAC4 |
| 2028 | SCWX | South Carolina Public Service Authority | added 4/1979; 1/1980-1/1994; eliminated 1/1999; 7/2000-7/2005 (not listed) | | NAKINA |
| 2029 | SCWX | South Carolina Public Service Authority | added 4/79; 1/80-1/94; eliminated 1/99; 7/2000 | | NRHS |
| 2030 | SCWX | SOUTH CAROLINA PUBLIC SERVICES AUTHORITY | | | PWRC |
| 2031 | SCWX | South Carolina Public Service Authority | | | RSRV |
| 2032 | SCWX | SOUTH CAROLINA PUBLIC SERVICES AUTH | | | SCAC4 |
| 2033 | SCWY | SCOTTS WAY | | | SCAC4 |
| 2034 | SCWZ | SEA CONTAINERS | | | PWRC |
| 2035 | SCWZ | Sea Containers | | | RSRV |
| 2036 | SCWZ | SEA CONTAINERS | | | SCAC4 |
| 2037 | SCX | Sun Country Airlines | IATA: SY, Callsign: Sun Country, IATA Prefix: 337, Name changed to MN Airlines, LLC d/b/a Sun Country Airlines w.e.f. July 2011. | USA | AVCODES |
| 2038 | SCX | MN Airlines, LLC d/b/a Sun Country Airlines | IATA: SY, Callsign: Sun Country, IATA Prefix: 337, Name changed from Sun Country Airlines w.e.f. July 2011. | USA | AVCODES |
| 2039 | SCX | Sun Country Inc d/b/a Sun Country Airlines | IATA: SY, Callsign: Sun Country, IATA Prefix: 337, Name changed from MN Airlines, LLC d/b/a Sun Country Airlines and previously from Sun Country Airlines w.e.f. July 2011. | USA | AVCODES |
| 2040 | SCX | Sun Country Airlines | IATA: SY | | ICAO1 |
| 2041 | SCX | The Shasta Water Co. | 7/1937-1/1952 | | NAKINA |
| 2042 | SCX | The Shasta Water Co. | 4/38-1/52 | | NRHS |
| 2043 | SCX | SHASTA WATER CO. | | | PWRC |
| 2044 | SCXA | SOUTH CENTRAL TEXAS RAILROAD, INC. | | | PWRC |
| 2045 | SCXA | ST CROIX TRANSFER INC | | | SCAC4 |
| 2046 | SCXB | SUGAR CREEK TAXIDERMY STUDIO | | | SCAC4 |
| 2047 | SCXE | SUNCORE XPRESS INC | | | SCAC4 |
| 2048 | SCXF | South Central Florida Express, Inc. | added 1/1995; added 4/1995; 7/2000-7/2005 | | NAKINA |
| 2049 | SCXF | South Central Florida Express, Inc. | added 1/95; added 4/95; 7/2000 | | NRHS |
| 2050 | SCXF | SOUTH CENTRAL FLORIDA EXPRESS | | | PWRC |
| 2051 | SCXF | South Central Florida Express | | | RSRV |
| 2052 | SCXF | SOUTH CENTRAL FLORIDA EXPRESS INC | | | SCAC4 |
| 2053 | SCXG | SUN COAST LOGISTICS LLC | | | SCAC4 |
| 2054 | SCXJ | SEA CRUISE EXPRESS INC | | | SCAC4 |
| 2055 | SCXK | SATCHELL CREEK EXPRESS INC | | | SCAC4 |
| 2056 | SCXN | SCOTT'S EXPRESS INC. | | | PWRC |
| 2057 | SCXN | SCOTTS EXPRESS INC | | | SCAC4 |
| 2058 | SCXO | SCI TRANSPORT LLC | | | SCAC4 |
| 2059 | SCXT | SALVESEN, CHRISTIAN TRANSPORT CO IN | | | SCAC4 |
| 2060 | SCXU | SEACO SRL | | BDS | BIC |
| 2061 | SCXU | ALNERY NO. 954 LIMITED (U.K.) | | | PWRC |
| 2062 | SCXU | Alnery No. 954 Limited | | | RSRV |
| 2063 | SCXU | SEA CONTAINERS LTD | | | SCAC4 |
| 2064 | SCXV | SUPERIOR CARRIERS INC (DTL DIVISION | | | SCAC4 |
| 2065 | SCXW | SIERRA FREIGHT LLC | | | SCAC4 |
| 2066 | SCXY | St. Croix Valley R.R. Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 2067 | SCXY | St. Croix Valley R.R. Co. | added 1/98; 7/2000 | | NRHS |
| 2068 | SCXY | ST. CROIX VALLEY RAILROAD COMPANY | | | PWRC |
| 2069 | SCXY | St. Croix Valley Railroad | | | RSRV |
| 2070 | SCXY | ST CROIX VALLEY RAILROAD COMPANY | | | SCAC4 |
| 2071 | SCY | Air Scandic | Callsign: Airscan, Ceased operations in September 2006. | GB | AVCODES |
| 2072 | SCY | SEAVIEW COMPANY | | | PWRC |
| 2073 | SCYA | ST CHARLES COUNTY COOPERATIVE COMPA | | | SCAC4 |
| 2074 | SCYC | STERICYCLE INC | | | SCAC4 |
| 2075 | SCYF | STACYS SERVICE COMPANY LLC | | | SCAC4 |
| 2076 | SCYH | STAR TRANS CONTAINER LINE LTD | | | SCAC4 |
| 2077 | SCYI | SOUCY INTERNATIONAL INC | | | SCAC4 |
| 2078 | SCYK | SCOTTYS TRUCKING | | | SCAC4 |
| 2079 | SCYL | SUN COUNTRY LOGISTICS LLC | | | SCAC4 |
| 2080 | SCYM | SCOTTYS OIL CO INC | | | SCAC4 |
| 2081 | SCYN | SO CAL METAL RECYCLING INC | | | SCAC4 |
| 2082 | SCYR | SCULLY TRANSPORTATION | | | SCAC4 |
| 2083 | SCYS | SOUTHWEST CARGO SYSTEMS LLC | | | SCAC4 |
| 2084 | SCYU | SEA CONTAINERS AMERICA INC | | | SCAC4 |
| 2085 | SCYX | Farmers Cooperative Association of York, Nebraska | added 4/1981; eliminated 7/1988 | | NAKINA |
| 2086 | SCYX | U.S. Rail Services, Inc. | added 7/1988; 1/1994; eliminated 4/1994 | | NAKINA |
| 2087 | SCYX | USL Capital Rail Services | added 4/1994; eliminated 10/1996 | | NAKINA |
| 2088 | SCYX | First Union Rail | added 10/1996; 7/2000-7/2005 | | NAKINA |
| 2089 | SCYX | Farmers Cooperative Association of York, Nebraska | added 4/81; eliminated 7/88 | | NRHS |
| 2090 | SCYX | U.S. Rail Services, Inc. | added 7/88; 1/94; eliminated 4/94 | | NRHS |
| 2091 | SCYX | USL Capital Rail Services | added 4/94; eliminated 10/96 | | NRHS |
| 2092 | SCYX | First Union Rail | added 10/96; 7/2000 | | NRHS |
| 2093 | SCYX | *FARMERS COOPERATIVE ASSOCIATION OF YORK, NEBRASKA | | | PWRC |
| 2094 | SCYX | +FIRST UNION RAIL [(RUSX) USL CAPITAL RAIL SERVICES] | | | PWRC |
| 2095 | SCYX | Farmers Cooperative Association of York, Nebraska | | | RSRV |
| 2096 | SCYZ | SEA CONTAINERS | | | PWRC |
| 2097 | SCYZ | Sea Containers | | | RSRV |
| 2098 | SCYZ | SEA CONTAINERS | | | SCAC4 |
| 2099 | SCZ | SWIFT & CO. | | | PWRC |
| 2100 | SCZC | SCHATZ CROSS ROADS TRUCK STOP INC | | | SCAC4 |
