| 2601 | ACQ | Aryan Cargo & Express Logistics (P) Ltd. (ACE) | IATA: YE, Callsign: Ace Cargo, IATA Prefix: 185, Ceased operations on 01 June 2010. | IND | AVCODES |
| 2602 | ACQ | Nuevo Continente | IATA: N6 | | ICAO1 |
| 2603 | ACQA | AFRICA CAR CARRIER | | | SCAC4 |
| 2604 | ACQB | ACORN TRANSPORTATION SERVICES INC | | | SCAC3 |
| 2605 | ACQC | AMERICAN CARTAGE CO INC | | | SCAC3 |
| 2606 | ACQD | AIR CARGO DELIVERY OF FAYETTEVILLE | | | SCAC3 |
| 2607 | ACQD | AIR CARGO DELIVERY OF FAYETTEVILLE | | | SCAC4 |
| 2608 | ACQE | AC & E TRANSPORT INC | | | SCAC3 |
| 2609 | ACQF | ACORN FREIGHT INC | | | SCAC3 |
| 2610 | ACQF | ANDERSON COLUMBIA CO INC | | | SCAC4 |
| 2611 | ACQG | ATLANTA CARTAGE INC | | | SCAC3 |
| 2612 | ACQH | ACE SHIPPING CORP | | | SCAC3 |
| 2613 | ACQH | A C TRANSPORTATION | | | SCAC4 |
| 2614 | ACQI | AAA COURIERS INTERNATIONAL | | | SCAC3 |
| 2615 | ACQI | ACRIART INC | | | SCAC4 |
| 2616 | ACQJ | A C COURIER | | | SCAC3 |
| 2617 | ACQJ | ATC LOGISTICS CORP | | | SCAC4 |
| 2618 | ACQK | ALS CARTAGE LTD | | | SCAC3 |
| 2619 | ACQL | A C L MESSENGER SERVICE | | | SCAC3 |
| 2620 | ACQM | ACE QUALITY MOVERS | | | SCAC3 |
| 2621 | ACQM | ACQUISITION SCRAP METALS | | | SCAC4 |
| 2622 | ACQN | A-CAR-CARRIER | | | SCAC3 |
| 2623 | ACQN | A & C TRANSPORT | | | SCAC4 |
| 2624 | ACQP | ACCEL TRANSPORT CO | | | SCAC3 |
| 2625 | ACQR | ALLEN COUNTY TOWING | | | SCAC3 |
| 2626 | ACQS | AMERICAN COURIER SERVICE INC | | | SCAC3 |
| 2627 | ACQS | ACQUARIO SHIPHOLDING INTERNATIONAL | | | SCAC4 |
| 2628 | ACQT | ARCET EQUIPMENT CO INC | | | SCAC3 |
| 2629 | ACQU | ACUBENS SHIPPING & TRADING PTE.LTD. | | SGP | BIC |
| 2630 | ACQU | AUTO CONTAINERS | | | SCAC4 |
| 2631 | ACQV | A C TRANSPORTATION SERVICE | | | SCAC3 |
| 2632 | ACQV | AUTOEXPRESS EL CHARQUENO SA DE CV | | | SCAC4 |
| 2633 | ACQW | ALCO INC | | | SCAC3 |
| 2634 | ACQW | AC PIPE & EQUIPMENT CO | | | SCAC4 |
| 2635 | ACQY | A CANDIES COACHWORKS INC | | | SCAC4 |
| 2636 | ACR | ASA, Air Starline AG | Callsign: Aircruise, | CH | AVCODES |
| 2637 | ACR | Aerocenter, Escuela de Formacion de Pilotos Privados de Avion | Callsign: Aerocenter, | E | AVCODES |
| 2638 | ACR | Air Caravane, Inc. | Callsign: Caravane, | CDN | AVCODES |
| 2639 | ACR | Aerocenter, Escuela de Formacion de Pioltos Privad | | | ICAO1 |
| 2640 | ACR | ALGOMA CENTRAL RAILWAY | | | PWRC |
| 2641 | ACRA | ACERRA, RICHARD INC | | | SCAC3 |
| 2642 | ACRA | ACERRA TRANSPORTATION GROUP INC | | | SCAC4 |
| 2643 | ACRB | AMERICAN CARRIERS INC | | | SCAC3 |
| 2644 | ACRB | AMERICAN CARRIERS INC | | | SCAC4 |
| 2645 | ACRC | Andalusia & Conecuh R.R. Co., Inc. | added 7/1983; 1/1985; eliminated 10/1990; 1/1994 | | NAKINA |
| 2646 | ACRC | Andalusia & Conecuh R.R. Co., Inc. | eliminated 10/90; 1/94 | | NRHS |
| 2647 | ACRC | ANDALUSA & CONECUH RAILROAD CO. | | | PWRC |
| 2648 | ACRC | Andalusia and Conecuh Railroad | | | RSRV |
| 2649 | ACRD | ACORN DELIVERY SERVICE INC | | | SCAC3 |
| 2650 | ACRF | ALL CRANE RENTAL OF GEORGIA INC | | | SCAC4 |
| 2651 | ACRH | ACTIVE CARHAUL LLC | | | SCAC4 |
| 2652 | ACRI | ACRON TRANSPORTATION INC | | | SCAC3 |
| 2653 | ACRJ | AL-CAR TRANSPORTERS INC | | | SCAC3 |
| 2654 | ACRJ | ACTION COURIERS INC | | | SCAC4 |
| 2655 | ACRL | AMERICAN CENTRAL TRANSPORT INC | | | SCAC3 |
| 2656 | ACRL | AMERICAN CENTRAL TRANSPORT INC | | | SCAC4 |
| 2657 | ACRM | ALS CARTAGE | | | SCAC3 |
| 2658 | ACRM | AMARO CAZAREZ, ISMAEL | | | SCAC4 |
| 2659 | ACRN | ACORN PIPELINE COMPANY | | | SCAC3 |
| 2660 | ACRO | ACORN TRANSPORTATION, INC | | | SCAC3 |
| 2661 | ACRP | ACE TRUCK RENTAL CORP | | | SCAC3 |
| 2662 | ACRP | ARCON METAL PROCESSING | | | SCAC4 |
| 2663 | ACRQ | A C TRANSPORT INC | | | SCAC3 |
| 2664 | ACRQ | AMES CONSTRUCTION INC | | | SCAC4 |
| 2665 | ACRR | ALLEGANY CENTRAL RAILROAD | | | PWRC |
| 2666 | ACRR | ACERET TRUCKING | | | SCAC3 |
| 2667 | ACRS | A B INC | | | SCAC4 |
| 2668 | ACRT | AMERICAN TRANSPORTERS | | | SCAC3 |
| 2669 | ACRU | ACCIPITER OILFIELD EQUIPMENT | | PRC | BIC |
| 2670 | ACRV | ACCESS DELIVERY SERVICE | | | SCAC3 |
| 2671 | ACRW | ABC CARRIERS INC | | | SCAC3 |
| 2672 | ACRX | Elementis Chromium, LP | added 10/2003; 7/2005 | | NAKINA |
| 2673 | ACRX | American Chrome & Chemicals Inc. | added 4/1980; 1/1985-1/1994; eliminated 7/1998; 7/2000 (not listed) | | NAKINA |
| 2674 | ACRX | American Chrome & Chemicals Inc. | added 4/80; 1/94; eliminated 7/98; 7/2000 | | NRHS |
| 2675 | ACRX | ELEMENTIS CHROMIUM LP [AMERICAN CHROME & CHEMICALS INC.] | | | PWRC |
| 2676 | ACRX | American Chrome and Chemicals (Elementis Chromium) | | | RSRV |
| 2677 | ACRX | ELEMENTIS CHROMIUM LP | | | SCAC4 |
| 2678 | ACRY | ARKANSAS CENTRAL RAILWAY CO. | | | PWRC |
| 2679 | ACRY | ACCORD MOVING & STORAGE COMPANY | | | SCAC3 |
| 2680 | ACS | Air Cess (Liberia), Inc. | | LB | AVCODES |
| 2681 | ACS | Air Central, Inc. | Callsign: Air Central, | USA | AVCODES |
| 2682 | ACS | Aircraft Sales and Services (Pvt) Ltd | Callsign: Aircraft Sales, | PK | AVCODES |
| 2683 | ACS | Air Cess | | | ICAO1 |
| 2684 | ACS | ALASKA CARRIER SERVICES | | | SCAC4 |
| 2685 | ACSA | ACTIVE SUBURBAN TAXI | | | SCAC3 |
| 2686 | ACSB | ATLANTIC CITY SHUTTLE AND BUS SERVI | | | SCAC3 |
| 2687 | ACSB | A C S BUSINESS PROCESS SOLUTIONS DE | | | SCAC4 |
| 2688 | ACSC | ANCHOR CONTAINER SERVICE CO | | | SCAC3 |
| 2689 | ACSD | ACS EXPRESS INC | | | SCAC3 |
| 2690 | ACSE | ATLANTIC COAST EXPRESS INC | | | SCAC3 |
| 2691 | ACSE | ADVANCED CARGO SAC | | | SCAC4 |
| 2692 | ACSF | ALAMEDA CHEMICAL & SCIENTIFIC INC | | | SCAC4 |
| 2693 | ACSG | ACC SHIPPING LTD | | | SCAC4 |
| 2694 | ACSH | A-C TRUCK SERVICE INC | | | SCAC3 |
| 2695 | ACSI | ACE STORAGE & MOVING COMPANY INC | | | SCAC3 |
| 2696 | ACSI | AAA COURIER SERVICE INC | | | SCAC4 |
| 2697 | ACSJ | ACE RELOCATION SYSTEMS INC OF S J | | | SCAC4 |
| 2698 | ACSK | ATLANTIC COASTAL TRUCKING CO | | | SCAC3 |
| 2699 | ACSK | ATLANTIC COASTAL TRUCKING CO INC | | | SCAC4 |
| 2700 | ACSL | AMERICAN COASTAL LINES INC | | | SCAC3 |
