| 1 | ACK | Nantucket Airlines | Callsign: Ack Air, | USA | AVCODES |
| 2 | ACK | Nantucket Airlines | IATA: DV | | ICAO1 |
| 3 | ACKA | ABC RACE TRACK TRANSPORT INC | | | SCAC3 |
| 4 | ACKB | ACTION TRUCK BROKERAGE | | | SCAC3 |
| 5 | ACKB | ACTION TRUCK BROKERAGE | | | SCAC4 |
| 6 | ACKC | A C S TRUCKING INC | | | SCAC4 |
| 7 | ACKD | AROUND THE CLOCK DELIVERY CO INC | | | SCAC3 |
| 8 | ACKE | AIR CARGO EXPRESS INC | | | SCAC3 |
| 9 | ACKE | AURORA COOP ELEVATOR COMPANY | | | SCAC4 |
| 10 | ACKG | A C TRUCKING-LOCAL AND LONG DISTANC | | | SCAC3 |
| 11 | ACKG | A C TRUCKING INC | | | SCAC4 |
| 12 | ACKH | ALL CHICAGOLAND MOVING & STORAGE CO | | | SCAC3 |
| 13 | ACKH | ALL CHICAGOLAND MOVING & STORAGE CO | | | SCAC4 |
| 14 | ACKI | ACKERS INDUSTRIES INC | | | SCAC3 |
| 15 | ACKI | ACE TRANSPORT-NC LLC | | | SCAC4 |
| 16 | ACKJ | A & C TRUCKING 1 LLC | | | SCAC4 |
| 17 | ACKK | ACCOKEEK EXPRESS INC | | | SCAC3 |
| 18 | ACKL | ACKLEY TRUCK LINE INC | | | SCAC3 |
| 19 | ACKM | ACKERMAN OIL CORPORATION | | | SCAC4 |
| 20 | ACKN | AMERICAN CHEMICAL TANKERS INC | | | SCAC3 |
| 21 | ACKO | ABC TRUCKING INC | | | SCAC3 |
| 22 | ACKP | AMERICAN CHECK TRANSPORT INC | | | SCAC3 |
| 23 | ACKP | ALLIANCE CASKET CORPORATION | | | SCAC4 |
| 24 | ACKQ | ALL COMMODITIES TRUCKING INC | | | SCAC3 |
| 25 | ACKQ | ATLANTIC COAST TRUCKING INC | | | SCAC4 |
| 26 | ACKR | ACTION TRUCK RENTAL | | | SCAC3 |
| 27 | ACKR | ACKER, BRIAN G | | | SCAC4 |
| 28 | ACKS | ABLE COURIER SERVICE | | | SCAC3 |
| 29 | ACKT | ACKERMAN TRUCKING INC | | | SCAC3 |
| 30 | ACKV | A & C TRUCKING | | | SCAC3 |
| 31 | ACKV | ACE TANKERS C V | | | SCAC4 |
| 32 | ACKX | Armstrong Cork Co. | eliminated 1/1966 | | NAKINA |
| 33 | ACKX | Armstrong Cork Co. | 7/1930-4/1938 | | NAKINA |
| 34 | ACKX | Armstrong Cork Co., Linoleum Division | 1/1941-7/1965 | | NAKINA |
| 35 | ACKX | Armstrong Cork Co. | Apr-38 | | NRHS |
| 36 | ACKX | Armstrong Cork Co., Linoleum Division | 1/52-7/65 | | NRHS |
| 37 | ACKX | Armstrong Cork Co. | eliminated 1/66 | | NRHS |
| 38 | ACKX | ARMSTRONG CORK CO. | | | PWRC |
| 39 | ACKY | ACE TRUCKING COMPANY INC | | | SCAC3 |
| 40 | ACKY | ARC & D TRUCKING LLC | | | SCAC4 |
