| 1 | ACP | Air Cape | Callsign: Cape, Designator KP recalled by IATA | ZA | AVCODES |
| 2 | ACP | Air Cape | IATA: KP, Callsign: Cape, Designator KP recalled by IATA | ZA | AVCODES |
| 3 | ACP | Astral Aviation Ltd. | IATA: 8V, Callsign: Astral Cargo, IATA Prefix: 485, | EAK | AVCODES |
| 4 | ACP | Astral Aviation | IATA: 8V | | ICAO1 |
| 5 | ACPA | ACROPOLIS TRANSPORTATION SERVICES I | | | SCAC3 |
| 6 | ACPB | ATHENS CAPE COMPANIA NAVIERA SA | | | SCAC3 |
| 7 | ACPC | ALLIED COMMERCIAL PRODUCTS INC | | | SCAC3 |
| 8 | ACPD | AIR CARGO PICK-UP AND DELIVERY SERV | | | SCAC3 |
| 9 | ACPE | ARAB COMMERCIAL ENTERPRISES (ACE TR | | | SCAC3 |
| 10 | ACPF | AIR CAPITAL INTERNATIONAL | | | SCAC3 |
| 11 | ACPH | AIR CAPITOL MOBILE HOME TRANSPORTIN | | | SCAC3 |
| 12 | ACPI | ACME PREMIUM SUPPLY CORP | | | SCAC3 |
| 13 | ACPJ | A C D C TRUCK LEASING | | | SCAC3 |
| 14 | ACPJ | A CONTAINER TRANSPORT | | | SCAC4 |
| 15 | ACPK | A-ONE (A-1) CREATIVE PACKAGING CORP | | | SCAC3 |
| 16 | ACPL | ACCOMPLISHED MOVERS INC | | | SCAC3 |
| 17 | ACPL | AL-CA-POL LOGISTICS INC | | | SCAC4 |
| 18 | ACPM | A-COMPASS MOVERS INC | | | SCAC3 |
| 19 | ACPM | ALLIANCE CONCRETE PUMPS INC | | | SCAC4 |
| 20 | ACPN | ALL-CAL TRANSPORTATION INC | | | SCAC3 |
| 21 | ACPO | AUTO CITY PIGGYBACK INC | | | SCAC3 |
| 22 | ACPO | ACE PYRO LLC | | | SCAC4 |
| 23 | ACPP | ACTION TRANSPORTATION SERVICES INC | | | SCAC3 |
| 24 | ACPP | ACAPULCO POOLS | | | SCAC4 |
| 25 | ACPQ | A C T TRUCKING CORP | | | SCAC3 |
| 26 | ACPQ | ACTION IMPORTS INC | | | SCAC4 |
| 27 | ACPR | ACCURATE PAPER RECYCLING CORP | | | SCAC3 |
| 28 | ACPS | ALL COVER PORTABLE SYSTEMS | | | SCAC4 |
| 29 | ACPT | ACE TRANSPORT LTD | | | SCAC3 |
| 30 | ACPU | CARDIGAS | | | SCAC4 |
| 31 | ACPV | AIR CAPITOL TRANSFER & STORAGE INC | | | SCAC3 |
| 32 | ACPV | AGROCOOPERATIVE LTD | | | SCAC4 |
| 33 | ACPW | A-CORP INC | | | SCAC3 |
| 34 | ACPW | AGLAND CO OP INC | | | SCAC4 |
| 35 | ACPX | Union Tank Car Co. | added 10/2003; 7/2005 | | NAKINA |
| 36 | ACPX | BP Products North America Inc. | added 1/2003; eliminated 10/2003 | | NAKINA |
| 37 | ACPX | Amoco Oil Co. | added 1/1998; 7/2000; eliminated 1/2003 | | NAKINA |
| 38 | ACPX | CGTX Inc. | added 1/1993; 1/1994; eliminated 10/1997 | | NAKINA |
| 39 | ACPX | Amoco Canada Petroleum Co., Ltd. | added 1/1981; 1/1985; eliminated 1/1993 | | NAKINA |
| 40 | ACPX | Amoco Canada Petroleum Co., Ltd. | added 1/81; eliminated 1/93 | | NRHS |
| 41 | ACPX | CGTX Inc. | added 1/93; 1/94; eliminated 10/97 | | NRHS |
| 42 | ACPX | Amoco Oil Co. | added 1/98; 7/2000 | | NRHS |
| 43 | ACPX | *AMOCO CANADA PETROLEUM COMPANY LTD. | | | PWRC |
| 44 | ACPX | *BP PRODUCTS NORTH AMERICA INC. [CGTX,INC.; AMOCO OIL CO.] | | | PWRC |
| 45 | ACPX | +UNION TANK CAR CO. | | | PWRC |
| 46 | ACPX | Amoco Canada Petroleum (Union Tank Car Lines) | | | RSRV |
| 47 | ACPX | UNION TANK CAR COMPANY | | | SCAC4 |
| 48 | ACPZ | *AMERICAN CONCRETE PRODUCTS COMPANY | | | PWRC |
| 49 | ACPZ | *AMERICAN CAST IRON PIPE CO. | | | PWRC |
| 50 | ACPZ | American Concrete Products | | | RSRV |
| 51 | ACPZ | AMERICAN CONCRETE PRODUCTS COMPANY | | | SCAC4 |
