| 1 | CEM | Central Mongolia Airways | Callsign: Central Mongolia, | MGL | AVCODES |
| 2 | CEM | Central Mongolia Airways | | | ICAO1 |
| 3 | CEMA | CEMENTOS DEL MAR S A | | | SCAC3 |
| 4 | CEMAT | Mercitalia Intermodal SpA | | I | TRAFFIC |
| 5 | CEMAT | CEMAT S.p.A. | | IT | VKM |
| 6 | CEMB | CENTRAL EASTERN MISSOURI EXPRESS | | | SCAC3 |
| 7 | CEMB | CLASS EIGHT (8) MOTOR FREIGHT LLC | | | SCAC4 |
| 8 | CEMC | C E LIMITED LIABILITY CO | | | SCAC4 |
| 9 | CEMD | CEMENT DISTRIBUTORS, INCORPORATED | | | SCAC3 |
| 10 | CEMES | CEMES | | I | TRAFFIC |
| 11 | CEMET | CEMET S.A. | | PL | VKM |
| 12 | CEMF | CENTRAL MFG SERVICES | | | SCAC4 |
| 13 | CEMG | CHEM FLEET | | | SCAC4 |
| 14 | CEMI | CADEMARTORIA TRUCKING CO | | | SCAC3 |
| 15 | CEMI | CONTRERAS DE LA ROSA, EMILIO | | | SCAC4 |
| 16 | CEMK | CHEMICAL TRANSPORT INC | | | SCAC3 |
| 17 | CEML | CEMENT TRANSPORT LTD | | | SCAC3 |
| 18 | CEMM | CEM INC | | | SCAC3 |
| 19 | CEMM | CEM MACHINE INC | | | SCAC4 |
| 20 | CEMN | CAR-ET MARINE INC. | | | SCAC3 |
| 21 | CEMN | CERCUEILS MAGOG 1994 INC | | | SCAC4 |
| 22 | CEMO | CENTRAL MOVING & STORAGE | | | SCAC3 |
| 23 | CEMQ | COLE, M C | | | SCAC3 |
| 24 | CEMR | Central Manitoba Ry., Inc. | 7/2000-7/2005 | | NAKINA |
| 25 | CEMR | Central Manitoba Ry., Inc. | Jul-00 | | NRHS |
| 26 | CEMR | CENTRAL MANITOBA RAILWAY | | | PWRC |
| 27 | CEMR | Central Manitoba Railway | | | RSRV |
| 28 | CEMR | CENTRAL MANITOBA RAILWAY INC | | | SCAC4 |
| 29 | CEMS | CENTRAL MAINE STORAGE CO | | | SCAC3 |
| 30 | CEMS | CENTRAL MAINE MOVING & STORAGE AND | | | SCAC4 |
| 31 | CEMT | CENTRAL MAINE TRANSPORT | | | SCAC4 |
| 32 | CEMU | CHEMION LOGISTIK GMBH | | D | BIC |
| 33 | CEMU | C E M A N SPECIAL CONTAINER GMBH | | | SCAC3 |
| 34 | CEMU | CHEMION LOGISTIK GMBH | | | SCAC4 |
| 35 | CEMV | COLEMANS MOVING & STORAGE LTD | | | SCAC3 |
| 36 | CEMV | CEMEX | | | SCAC4 |
| 37 | CEMW | CORPORATE MOVING SYSTEMS | | | SCAC3 |
| 38 | CEMW | CORPORATE MOVING SYSTEMS | | | SCAC4 |
| 39 | CEMX | Cemex, Inc. | added 7/2005 | | NAKINA |
| 40 | CEMX | Cemex Mexico SA de CV | added 1/2001; eliminated 7/2005; 7/2005 (not listed) | | NAKINA |
| 41 | CEMX | Sunbelt Cement, Inc. | added 7/1991; 1/1994-7/2000; eliminated 1/2001 | | NAKINA |
| 42 | CEMX | Cementos Mexicanos, S.A. | added 4/1984; eliminated 7/1991 | | NAKINA |
| 43 | CEMX | Cementos Mexicanos, S.A. | added 4/84; eliminated 7/91 | | NRHS |
| 44 | CEMX | Sunbelt Cement, Inc. | added 7/91; 1/94-7/2000; eliminated 1/2001 | | NRHS |
| 45 | CEMX | Cemex Mexico SA de CV | added 1/2001 | | NRHS |
| 46 | CEMX | CEMEX MEXICO SA DE CV [(MELX) SUNBELT CEMENT, INC.(CEMENTOS MEXICANOS SA)] | | | PWRC |
| 47 | CEMX | Cementos Mexicanos (Cemex Mexico de CV) | | | RSRV |
| 48 | CEMX | CEMEX MEXICO SA DE CV | | | SCAC4 |
| 49 | CEMX | Cemex Mexico SA | former: Cementos Mexicanos, S.A. | MEX | TRAFFIC |
| 50 | CEMY | C & E MOTOR COACH INC | | | SCAC3 |
| 51 | CEMZ | CYPRESS EMERALD MINE | | | PWRC |