| 1 | ACS | Air Cess (Liberia), Inc. | | LB | AVCODES |
| 2 | ACS | Air Central, Inc. | Callsign: Air Central, | USA | AVCODES |
| 3 | ACS | Aircraft Sales and Services (Pvt) Ltd | Callsign: Aircraft Sales, | PK | AVCODES |
| 4 | ACS | Air Cess | | | ICAO1 |
| 5 | ACS | ALASKA CARRIER SERVICES | | | SCAC4 |
| 6 | ACSA | ACTIVE SUBURBAN TAXI | | | SCAC3 |
| 7 | ACSB | ATLANTIC CITY SHUTTLE AND BUS SERVI | | | SCAC3 |
| 8 | ACSB | A C S BUSINESS PROCESS SOLUTIONS DE | | | SCAC4 |
| 9 | ACSC | ANCHOR CONTAINER SERVICE CO | | | SCAC3 |
| 10 | ACSD | ACS EXPRESS INC | | | SCAC3 |
| 11 | ACSE | ATLANTIC COAST EXPRESS INC | | | SCAC3 |
| 12 | ACSE | ADVANCED CARGO SAC | | | SCAC4 |
| 13 | ACSF | ALAMEDA CHEMICAL & SCIENTIFIC INC | | | SCAC4 |
| 14 | ACSG | ACC SHIPPING LTD | | | SCAC4 |
| 15 | ACSH | A-C TRUCK SERVICE INC | | | SCAC3 |
| 16 | ACSI | ACE STORAGE & MOVING COMPANY INC | | | SCAC3 |
| 17 | ACSI | AAA COURIER SERVICE INC | | | SCAC4 |
| 18 | ACSJ | ACE RELOCATION SYSTEMS INC OF S J | | | SCAC4 |
| 19 | ACSK | ATLANTIC COASTAL TRUCKING CO | | | SCAC3 |
| 20 | ACSK | ATLANTIC COASTAL TRUCKING CO INC | | | SCAC4 |
| 21 | ACSL | AMERICAN COASTAL LINES INC | | | SCAC3 |
| 22 | ACSL | ACE SALES | | | SCAC4 |
| 23 | ACSO | ACTION SERVICE INC | | | SCAC3 |
| 24 | ACSO | ACS TRANSPORTATION LLC | | | SCAC4 |
| 25 | ACSP | ACME TRADING & SUPPLY CO | | | SCAC3 |
| 26 | ACSP | ALL COMMODITIES TRANSPORT LLC | | | SCAC4 |
| 27 | ACSQ | A C S DELIVERY SERVICE | | | SCAC3 |
| 28 | ACSR | ALLIED CONTAINER SERVICE INC | | | SCAC3 |
| 29 | ACSS | ACCESS TRANSPORTATION LTD | | | SCAC4 |
| 30 | ACST | ATLANTIC TRUCKING EXPRESS INC | | | SCAC3 |
| 31 | ACSU | Commonwealth Independent States Navigation (2019) Inc | | CDN | BIC |
| 32 | ACSU | ATLANTIC CARGO SERVICES | | | PWRC |
| 33 | ACSU | Atlantic Cargo Services, AB | | | RSRV |
| 34 | ACSU | ATLANTIC CARGO SERVICES | | | SCAC3 |
| 35 | ACSU | COMMONWEALTH INDEPENDENT STATES NAV | | | SCAC4 |
| 36 | ACSV | ACTION COURIER SERVICES INC | | | SCAC4 |
| 37 | ACSX | Honeywell International, Inc. | added 7/2000; 7/2000-7/2005 | | NAKINA |
| 38 | ACSX | AlliedSignal Inc. | added 1/1999; eliminated 7/2000 | | NAKINA |
| 39 | ACSX | First Union Properties, Inc. | added 10/1964; 7/1965-1/1994; eliminated 1/1999 | | NAKINA |
| 40 | ACSX | Allied Chemical Corp. | added 10/1963; eliminated 10/1964 | | NAKINA |
| 41 | ACSX | First Union Properties, Inc. | 7/65-1/94; eliminated 1/99 | | NRHS |
| 42 | ACSX | AlliedSignal Inc. | added 1/99; eliminated 7/2000 | | NRHS |
| 43 | ACSX | Honeywell International | added 7/2000; 7/2000 | | NRHS |
| 44 | ACSX | *FIRST UNION PROPERTIES, INC. (ALLIED CHEMICAL; ALLIED SIGNAL; HONEYWELL INTL. LESSEES) | | | PWRC |
| 45 | ACSX | +HONEYWELL INTERNATIONAL, INC. | | | PWRC |
| 46 | ACSX | Allied Chemical (First Union Properties) | | | RSRV |
| 47 | ACSX | HONEYWELL INTERNATIONAL INC | | | SCAC4 |
| 48 | ACSY | ACOUSTICAL SPECIALTIES & SUPPLY INC | | | SCAC3 |
| 49 | ACSY | ACUTEC SYSTEMS LTD | | | SCAC4 |
| 50 | ACSZ | *AMERICAN CARRIER EQUIPMENT | | | PWRC |
| 51 | ACSZ | *AMERICAN CRYSTAL SUGAR | | | PWRC |
| 52 | ACSZ | American Carrier Equipment | | | RSRV |
| 53 | ACSZ | AMERICAN CARRIER EQUIPMENT | | | SCAC4 |
