| 1 | CMP | Compania Panamena de Aviacion, S.A. (COPA) | IATA: CM, Callsign: COPA, IATA Prefix: 230, Name changed from COPA - Airlines. Name changed from COPA - Compania Panamena de Aviacion, S.A. | PA | AVCODES |
| 2 | CMP | Copa Airlines, Inc | IATA: CM, Callsign: COPA, IATA Prefix: 230, Name changed from Compania Panamena de Aviacion, S.A. (COPA) and previously from COPA - Airlines. Name changed from COPA - Compania Panamena de Aviacion, S.A. | PA | AVCODES |
| 3 | CMP | Copa Airlines | IATA: CM | | ICAO1 |
| 4 | CMPA | Madison R.R., Division of City of Madison Port Authority | added 1/1979; 1/1980; eliminated 7/1990; 1/1994-7/2005 | | NAKINA |
| 5 | CMPA | Madison R.R., Division of City of Madison Port Authority | added 1/79; 1/80; eliminated 7/90; 1/94-7/2000 | | NRHS |
| 6 | CMPA | MADISON RAILROAD (CITY OF MADISON PORT AUTHORITY) | | | PWRC |
| 7 | CMPA | City of Madison Port Authority | | | RSRV |
| 8 | CMPB | CAMPBELL BROTHERS HAULING | | | SCAC3 |
| 9 | CMPC | COMPUTRANS INC | | | SCAC3 |
| 10 | CMPD | CALYPSO MARINE COMPANY LIMITED | | | SCAC4 |
| 11 | CMPE | CAMPOS EXPRESS INC | | | SCAC3 |
| 12 | CMPF | COMPASS FORWARDING CO INC | | | SCAC3 |
| 13 | CMPF | COMPASS FORWARDING CO INC | | | SCAC4 |
| 14 | CMPG | CAMP TRUCKING, INCORPORATED | | | SCAC3 |
| 15 | CMPG | CONTINENTAL METAL PRODUCST AND DAKO | | | SCAC4 |
| 16 | CMPH | CAMP TRUCKING | | | SCAC3 |
| 17 | CMPH | CAMPOS, HUGO C H B | | | SCAC4 |
| 18 | CMPI | CAMPBELL TRUCK INC | | | SCAC3 |
| 19 | CMPI | CAMPLIN, WILLIS JOHN | | | SCAC4 |
| 20 | CMPK | COMPAK TRANSPORT | | | SCAC3 |
| 21 | CMPK | COMPONENT REPAIR & SUPPLY INC | | | SCAC4 |
| 22 | CMPM | CAMPBELL MOVING AND STORAGE CO | | | SCAC3 |
| 23 | CMPM | CAMPBE | | | SCAC4 |
| 24 | CMPO | CHAMPION SPARK PLUG CO | | | SCAC3 |
| 25 | CMPP | COUNTRY MEAT PACKERS INC | | | SCAC4 |
| 26 | CMPQ | COMPETENT SHIPPING CORPORATION | | | SCAC3 |
| 27 | CMPR | CENTRAL MACHINING & PUMP REPAIR INC | | | SCAC4 |
| 28 | CMPS | COMPLETE TRANSFER & STORAGE INC | | | SCAC3 |
| 29 | CMPT | COMPTON, T R, INC | | | SCAC3 |
| 30 | CMPT | COMPTON, T R INC | | | SCAC4 |
| 31 | CMPU | COMPLETE LOGISTICS COMPANY | | | PWRC |
| 32 | CMPU | Complete Logistics | | | RSRV |
| 33 | CMPU | COMPLETE LOGISTICS COMPANY | | | SCAC3 |
| 34 | CMPU | F LLI CAMPIONI SRL | | | SCAC4 |
| 35 | CMPV | COMPUTRANS INC | | | SCAC3 |
| 36 | CMPW | CHARLOTTETOWN METAL PRODUCTS | | | SCAC4 |
| 37 | CMPX | Compass Capital Corp. | added 7/2005; 7/2005 | | NAKINA |
| 38 | CMPX | Chemical Products Corp. | 7/1935-10/1957; eliminated 4/1961 | | NAKINA |
| 39 | CMPX | Chemical Products Corp. | 4/38-10/57; eliminated 4/61 | | NRHS |
| 40 | CMPX | *CHEMICAL PRODUCTS CORP. | | | PWRC |
| 41 | CMPX | +COMPASS CAPITAL CORP. | | | PWRC |
| 42 | CMPX | COMPASS CAPITAL CORPORATION | | | SCAC4 |
| 43 | CMPY | CAMPYS EPXRESS | | | SCAC3 |
| 44 | CMPY | CAMPYS EXPRESS | | | SCAC4 |