| 1 | CMR | Cam Air Management Ltd. | Callsign: Cameo, | GB | AVCODES |
| 2 | CMR | CAM Air Management | | | ICAO1 |
| 3 | CMR | Central Midland Ry. Co. | 7/2005 (not listed); added 10/2007 | | NAKINA |
| 4 | CMR | CENTRAL MIDLAND RWY. CO. | | | PWRC |
| 5 | CMR | Central Midland Railway | | | RSRV |
| 6 | CMR | CENTRAL MIDLAND RAILWAY COMPANY | | | SCAC4 |
| 7 | CMRB | CUMMINGS, ROBERT A | | | SCAC3 |
| 8 | CMRC | COLUMBIA RECYCLE 1996 LTD | | | SCAC4 |
| 9 | CMRD | CHICAGO-MILWAUKEE RUSH DELIVERY INC | | | SCAC3 |
| 10 | CMRD | CANCHOLA MARTINEZ, DAVID | | | SCAC4 |
| 11 | CMRE | CARLINES MARING TOWING INC | | | SCAC3 |
| 12 | CMRE | CENTRE MARAICHER EUGENE GUINOIS JR | | | SCAC4 |
| 13 | CMRG | CAMS TRUCKING | | | SCAC3 |
| 14 | CMRG | CRUCES MARGUEL | | | SCAC4 |
| 15 | CMRH | COMMERCIAL HAULING CO INC | | | SCAC3 |
| 16 | CMRH | CROWN MARINE MANAGEMENT S A OF MARS | | | SCAC4 |
| 17 | CMRI | CONTAINER MASTER INC | | | SCAC3 |
| 18 | CMRI | CARGO MARITIME INC | | | SCAC4 |
| 19 | CMRJ | CAMROSE COACH LINES LTD | | | SCAC3 |
| 20 | CMRK | CAMAR LIMITED | | | SCAC4 |
| 21 | CMRL | COMMERCIAL TRANSPORTATION INC | | | SCAC3 |
| 22 | CMRM | COMPUTER MOVERS INC | | | SCAC3 |
| 23 | CMRN | CAMERON FREIGHT LINE INC | | | SCAC3 |
| 24 | CMRO | COMMERCE TRANSPORTATION CO | | | SCAC3 |
| 25 | CMRP | CMR PARCEL SERVICE INC | | | SCAC3 |
| 26 | CMRQ | CENTRAL MANOR CARTAGE | | | SCAC3 |
| 27 | CMRQ | CAMEO CARDS | | | SCAC4 |
| 28 | CMRR | CATSKILL MOUNTAIN RAILROAD | | | PWRC |
| 29 | CMRR | COMSTOCK MOUNTAIN LION RAILROAD | | | SCAC4 |
| 30 | CMRS | CMS TRUCKING CO | | | SCAC3 |
| 31 | CMRT | CAMRETT LOGISTICS INC | | | SCAC4 |
| 32 | CMRU | AIR LIQUIDE CAMOA | | | SCAC4 |
| 33 | CMRV | COMPANIA MARITIMA VILLA NOVA S A , | | | SCAC3 |
| 34 | CMRW | CHEESEMAN, ROBERT W INC | | | SCAC3 |
| 35 | CMRW | CANADIAN MR SWEEPER INC | | | SCAC4 |
| 36 | CMRX | Cimarron Gas Companies Inc. | added 10/1993; 1/1994; eliminated 1/1996 | | NAKINA |
| 37 | CMRX | Chicago Macaroni Co. | 7/1935 | | NAKINA |
| 38 | CMRX | Cimarron Gas Liquids Co. | added 10/1988; eliminated 10/1993 | | NAKINA |
| 39 | CMRX | Cudahy's Milwaukee Refrigerator Line | 8/1920 | | NAKINA |
| 40 | CMRX | Cimarron Gas Liquids Co. | added 10/88; eliminated 10/93 | | NRHS |
| 41 | CMRX | Cimarron Gas Companies Inc. | added 10/93; 1/94; eliminated 1/96 | | NRHS |
| 42 | CMRX | *CUDAHY'S MILWAUKEE REFRIGERATOR LINE | | | PWRC |
| 43 | CMRX | *CIMARRON GAS COMPANIES INC. | | | PWRC |
| 44 | CMRX | COOPERSVILLE & MARNE RAILROAD | | | PWRC |
