| 1 | CYD | Access Air, Inc. | IATA: ZA, Callsign: Cyclone, Ceased operations on 27 February 2001. Operations to start again as Iowair 05/2000 | USA | AVCODES |
| 2 | CYD | Access Air | IATA: ZA | | ICAO1 |
| 3 | CYDA | CENTURY DEDICATED INC | | | SCAC4 |
| 4 | CYDB | CENTURY DISTRIBUTING CO | | | SCAC3 |
| 5 | CYDC | CLOYD, CLIFTON JEROME | | | SCAC3 |
| 6 | CYDD | CYCLONE DIAMOND PRODUCTS LTD | | | SCAC4 |
| 7 | CYDI | CYPERT, DALE TRUCKING | | | SCAC3 |
| 8 | CYDI | CYPRESS DISTRIBUTORS | | | SCAC4 |
| 9 | CYDP | CYCLE DISPATCH AND DELIVERY INC | | | SCAC3 |
| 10 | CYDP | CYCLE LOGISTICS INC | | | SCAC4 |
| 11 | CYDQ | CITY DELIVERY SYSTEM | | | SCAC3 |
| 12 | CYDS | CLYDES CARTAGE C0 | | | SCAC3 |
| 13 | CYDU | SIL | | F | BIC |
| 14 | CYDV | CARRY TRANSIT (DTL DIVISION) | | | SCAC4 |
| 15 | CYDX | Conrad Yelvington Distributors, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 16 | CYDX | Northbrook Corp. | 1/1994 (not listed) | | NAKINA |
| 17 | CYDX | Northbrook Corp. | Jan-94 | | NRHS |
| 18 | CYDX | Conrad Yelvington Distributors, Inc. | Jul-00 | | NRHS |
| 19 | CYDX | *NORTHBROOK CORPORATION | | | PWRC |
| 20 | CYDX | +CONRAD YELVINGTON DISTRIBUTORS INC. | | | PWRC |
| 21 | CYDX | Conrad Yelvington Distributors | | | RSRV |
| 22 | CYDZ | CONRAD YELVINGTON DISTRIBUTORS, INC. | | | PWRC |
