Real world company prefixes
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Q& QA QB QC QD QE QF QG QH QI QJ QK QL QM QN QO QP QQ QR QS QT QU QV QW QX QY
Q& QA QB QC QD QE QF QG QH QI QJ QK QL QM QN QO QP QQ QR QS QT QU QV QW QX QY
| 601 | QTTX | Trailer Train Co. (no definition) | 1/75-1/80 | NRHS | |
| 602 | QTTX | Trailer Train Co. | added 7/91; eliminated 1/92 | NRHS | |
| 603 | QTTX | TTX Co. | added 1/92 | NRHS | |
| 604 | QTTX | TTX Co. (heavy capacity special type flats AAR mechanical designations FD and FM ranging in capacity from 110-ton to 245-ton of various lengths) | Jan-94 | NRHS | |
| 605 | QTTX | TTX Co. (heavy capacity special type flats AAR mechanical designations FD and FM ranging in capacity from 105-ton to 370-ton of various lengths, equipped with end of car cush.) | Jul-00 | NRHS | |
| 606 | QTUI | Q2U INC | SCAC4 | ||
| 607 | QTUK | Q TRUCKING INC | SCAC3 | ||
| 608 | QTUM | QUANTUM TRANSPORTATION LLC | SCAC4 | ||
| 609 | QTX | Quaker City Tank Line (General American Transportation Corp.) | Apr-38 | NRHS | |
| 610 | QTX | Quantex Environmental | ICAO1 | ||
| 611 | QTX | QUAKER CITY TANK LINE | PWRC | ||
| 612 | QTX | General American Transportation Corp. | 7/1937-1/1943 | NAKINA | |
| 613 | QTX | Quaker City Tank Line (General American Tank Car Corp.) | 7/1935 | NAKINA | |
| 614 | QTX | Quaker City Tank Line | 7/1930-7/1932 | NAKINA | |
| 615 | QTXI | QUICK TRUX INC | SCAC3 | ||
| 616 | QTXI | QUEST EXPRESS TRUCKING | SCAC4 | ||
| 617 | QTXL | QUALITY TRANSPORT LLC | SCAC4 | ||
| 618 | QTYS | QUIK-TRIP | SCAC3 | ||
| 619 | QUAB | QUABOAG TRANSFER INC | SCAC3 | ||
| 620 | QUAC | QUAKER CITY FORWARDERS, INC | SCAC3 | ||
| 621 | QUAD | QUAD CITIES SPOTTING SERVICE | SCAC3 | ||
| 622 | QUADR | QUADRUM BVBA | BE | VKM | |
| 623 | QUAE | QUASAR EXPRESS | SCAC3 | ||
| 624 | QUAF | QUICK AIR FREIGHT INC | SCAC3 | ||
| 625 | QUAF | QUICK AIR FREIGHT INC | SCAC4 | ||
| 626 | QUAI | QUALITY MOVING & STORAGE INC | SCAC3 | ||
| 627 | QUAK | QUAKER TRANSPORT, INC | SCAC3 | ||
| 628 | QUAK | QUAKER TRANSPORT INC | SCAC4 | ||
| 629 | QUAM | QUALITY TEAM 1 | SCAC4 | ||
| 630 | QUAN | QUANDT TANK LINES | SCAC3 | ||
| 631 | QUAN | QUANTUM TRANSPORTATION LTD | SCAC4 | ||
| 632 | QUAO | QUALITY CONTAINER TRANSPORT INC | SCAC4 | ||
| 633 | QUAR | QUARRY TRUCK CO INC | SCAC3 | ||
| 634 | QUAS | QUAST TRANSFER, INC | SCAC3 | ||
| 635 | QUAS | QUAY TRANSPORT SERVICES INC | SCAC4 | ||
| 636 | QUAT | QUAKER TRANSIT CO INC | SCAC3 | ||
| 637 | QUAX | Quality Rail Services, LLC | added 1/2000; 7/2000; eliminated 4/2001 | NRHS | |
| 638 | QUAX | *QUALITY RAIL SERVICES, LLC | PWRC | ||
| 639 | QUAX | +REDSTREAK, LLC | PWRC | ||
| 640 | QUAX | Redstreak, LLC | 7/2005 (not listed); added 1/2007 | NAKINA | |
| 641 | QUAX | Quality Rail Services, LLC | added 1/2000; 7/2000; eliminated 4/2001 | NAKINA | |
| 642 | QUAX | Quality Rail Services | RSRV | ||
| 643 | QUAX | REDSTREAK LLC | SCAC4 | ||
| 644 | QUAY | QUALITY COURIER&EXPRESS SERVICE | SCAC3 | ||
| 645 | QUAY | QUALITY COURIER & EXPRESS SERVICE | SCAC4 | ||
| 646 | QUBC | QUEBEC PARCEL SERVICE | SCAC3 | ||
| 647 | QUBM | QUALITY BELT MAINTENANCE LTD | SCAC4 | ||
| 648 | QUBR | QUIN BROS CORP | SCAC3 | ||
| 649 | QUBR | QUALITY SOLUTIONS GROUP LLC | SCAC4 | ||
| 650 | QUBT | QUECKBOERNER TRUCKING INC | SCAC3 | ||
| 651 | QUCA | QUALITY CARTAGE, INC | SCAC3 | ||
| 652 | QUCC | QUEEN CARPET CORP | SCAC3 | ||
| 653 | QUCC | QUALITY DRIVE AWAY INC | SCAC4 | ||
| 654 | QUCD | QUICK DELIVERY CO | SCAC3 | ||
| 655 | QUCF | QUAD CITY FREIGHT SERVICE INC | SCAC3 | ||
| 656 | QUCF | QUAD CITY FREIGHT SERVICE INC | SCAC4 | ||
| 657 | QUCG | QUALITY CARTAGE INC | SCAC3 | ||
| 658 | QUCI | QUARRY CONCRETE INC | SCAC3 | ||
| 659 | QUCI | QUEEN CITY FUEL OIL | SCAC4 | ||
| 660 | QUCK | QUICKS MOTOR EXPRESS INC | SCAC3 | ||
| 661 | QUCK | QUICK TRANSFER LTD | SCAC4 | ||
| 662 | QUCL | QUADRA CARTAGE LTD | SCAC3 | ||
| 663 | QUCL | QUADRA COAST CARRIERS LTD | SCAC4 | ||
| 664 | QUCN | QUALITY CONTAINER SERVICE CORP INC | SCAC3 | ||
| 665 | QUCN | QUALFIN INC | SCAC4 | ||
| 666 | QUCO | QUALITY WAREHOUSE CO | SCAC3 | ||
| 667 | QUCW | QUALITY COACHWAY INC | SCAC4 | ||
| 668 | QUDC | QUAD CITIES TRANSPORT INC | SCAC3 | ||
| 669 | QUDI | QUALITY DELIVERY INC | SCAC3 | ||
| 670 | QUDN | QUALITY DINETTES INC | SCAC3 | ||
| 671 | QUDS | QUALITY DELIVERY SERVICE | SCAC3 | ||
| 672 | QUE | Quebec Government Air Service | ICAO1 | ||
| 673 | QUEB | QUEENS TAXI | SCAC3 | ||
| 674 | QUED | QUEENSLAND DISTRIBUTORS LTD | SCAC3 | ||
| 675 | QUEE | QUEENAIRE TECHNOLOGIES INC | SCAC4 | ||
| 676 | QUEI | QUEIROLO, ANTHONY HENRY | SCAC3 | ||
| 677 | QUEL | QUELL PETROLEUM SERVICES INC | SCAC4 | ||
| 678 | QUEN | QUEEN & MCDONALD, INCORPORATED | SCAC3 | ||
| 679 | QUES | QUESTAR TRANSPORTATION INC | SCAC3 | ||
| 680 | QUES | QUESOS DEL PUEBLO | SCAC4 | ||
| 681 | QUEY | QUALITY ENERGY INC | SCAC4 | ||
| 682 | QUFI | QUAITY FOODS INC | SCAC3 | ||
| 683 | QUFM | QUINCY FARMS | SCAC3 | ||
| 684 | QUFM | QUINCY FARMS | SCAC4 | ||
| 685 | QUFS | QUICKWAY FREIGHT SYSTEMS | SCAC4 | ||
| 686 | QUFT | QUIRIN, FRITZ, TRUCKING, INC | SCAC3 | ||
| 687 | QUFT | QUIRIN, FRITZ TRUCKING INC | SCAC4 | ||
| 688 | QUGO | QUICK DELIVERY SERVICE INC | SCAC3 | ||
| 689 | QUGO | QUICK DELIVERY SERVICE | SCAC4 | ||
| 690 | QUGS | QUANDAHLS GRAIN SERVICE | SCAC3 | ||
| 691 | QUHY | QUEST HYDRAULICS INC | SCAC4 | ||
| 692 | QUI | Aero Quimmco | ICAO1 | ||
| 693 | QUID | QUINN, D L CO INC | SCAC3 | ||
| 694 | QUID | QUINTANA SAMANO, ROBERTO AND DROBER | SCAC4 | ||
| 695 | QUIF | QUALITY FREIGHT INC | SCAC3 | ||
| 696 | QUIG | QUIRING MOTORS LTD | SCAC4 | ||
| 697 | QUII | QUALITY INDUSTRIES INC | SCAC3 | ||
| 698 | QUII | QUINTAINE, J & SON LTD | SCAC4 | ||
| 699 | QUIK | QUIKRETE COMPANIES INC, THE | SCAC4 | ||
| 700 | QUIL | QUINN OIL INC | SCAC4 |