| 1 | CYT | Crystal Shamrock | Callsign: Crystal Air, | USA | AVCODES |
| 2 | CYT | Crystal Air | Callsign: Crystal Air, | USA | AVCODES |
| 3 | CYT | Crystal Shamrock | | | ICAO1 |
| 4 | CYTA | CENTURY TRANSPORTATION CO | | | SCAC3 |
| 5 | CYTA | CROSBY TRANSFER INC | | | SCAC4 |
| 6 | CYTB | CHENEY TRUCK LINES INC | | | SCAC3 |
| 7 | CYTC | C & Y TRANSPORTATION COMPANY INC | | | SCAC4 |
| 8 | CYTD | CITY TRANSFER, INC | | | SCAC3 |
| 9 | CYTD | CITY TRANSFER INC | | | SCAC4 |
| 10 | CYTE | COYOTE TRUCKING INC | | | SCAC3 |
| 11 | CYTF | CAL-ARY TRANSPORT LTD | | | SCAC4 |
| 12 | CYTG | COURTNEY, TIM AUTO TRANSPORT INC | | | SCAC4 |
| 13 | CYTH | CAUSLEY TRUCKING INC | | | SCAC4 |
| 14 | CYTI | CITY TRANSFER AND STORAGE INC | | | SCAC3 |
| 15 | CYTI | CITY TRANSFER AND STORAGE INC | | | SCAC4 |
| 16 | CYTJ | CURY TRANSPORT INC | | | SCAC4 |
| 17 | CYTK | COLEY, FRED TRUCKING | | | SCAC3 |
| 18 | CYTK | CARNEY TRUCKING | | | SCAC4 |
| 19 | CYTM | CHEYENNE TRANSPORT COMPANY | | | SCAC3 |
| 20 | CYTN | COLEARY TRANSPORT INC | | | SCAC3 |
| 21 | CYTN | CODY TRANSPORT INC | | | SCAC4 |
| 22 | CYTO | CLAYTON COURIER SERVICE INC | | | SCAC3 |
| 23 | CYTP | CITY TRANSPORT COMPANY | | | SCAC3 |
| 24 | CYTP | COUNTRY TRANSPORT LLC | | | SCAC4 |
| 25 | CYTQ | CITY TRANSFER | | | SCAC3 |
| 26 | CYTQ | COUNTRYSIDE TRANSPORT LTD | | | SCAC4 |
| 27 | CYTS | CITY TRANSFER (1945) LIMITED | | | SCAC3 |
| 28 | CYTS | CITY TRANSFER INC | | | SCAC4 |
| 29 | CYTT | CORNELY, R T TRUCKING | | | SCAC3 |
| 30 | CYTT | CORNELY, R T TRUCKING INC | | | SCAC4 |
| 31 | CYTU | CRYOTANKS LTD | | GB | BIC |
| 32 | CYTW | CROWLEY TOWING & TRANSPORTATION | | | SCAC3 |
| 33 | CYTX | Construcciones Y Trituaraciones, S.A. de C.V. | added 10/1994; 7/2000; eliminated 1/2005; 7/2005 (not listed) | | NAKINA |
| 34 | CYTX | Construcciones Y Trituaraciones, S.A. de C.V. | added 10/94; 7/2000 | | NRHS |
| 35 | CYTX | CONSTRUCCIONES Y TRITUARACIONES, S.A. DE C.V. | | | PWRC |
| 36 | CYTX | Construcciones Y Trituaraciones de CV | | | RSRV |
