| 2601 | HLVS | HALVORSON, RALPH | SCAC4 | ||
| 2602 | HLW | Heliworks | ICAO1 | ||
| 2603 | HLWC | HLW INC | SCAC4 | ||
| 2604 | HLWE | HOWARD, LEWIS E TRUCKING INC | SCAC4 | ||
| 2605 | HLWG | HOLLOWAY TRUCKING LLC | SCAC4 | ||
| 2606 | HLWI | HOLWIN TOOLING SYSTEMS INC | SCAC4 | ||
| 2607 | HLX | Hapag-Lloyd Express (TUIfly) | IATA: X3 | ICAO1 | |
| 2608 | HLX | North American Car Corp. | 7/1937-4/1947 | NAKINA | |
| 2609 | HLX | Humane Live Stock Car Co. (North American Car Corp.) | 7/1930-7/1935 | NAKINA | |
| 2610 | HLX | (North American Car Corp.) | Apr-38 | NRHS | |
| 2611 | HLX | NORTH AMERICAN CAR CORP. (HUMANE LIVE STOCK CAR CO.) | PWRC | ||
| 2612 | HLXA | HALL EXPRESS | SCAC4 | ||
| 2613 | HLXC | HELIX COURIER LIMITED | SCAC4 | ||
| 2614 | HLXI | HULL TRANSPORTATION INC | SCAC4 | ||
| 2615 | HLXL | HELIX LOGISTICS LLC | SCAC4 | ||
| 2616 | HLXM | HL TRANSPORTES | SCAC4 | ||
| 2617 | HLXN | HALLS TRANSPORTATION | SCAC4 | ||
| 2618 | HLXO | HALL TRANSPORT | SCAC4 | ||
| 2619 | HLXP | HOTLINE EXPRESS LLC | SCAC4 | ||
| 2620 | HLXS | HELIX SEISMIC EXPLORATION INC | SCAC4 | ||
| 2621 | HLXT | HILLTRUX TANK LINES INC | SCAC4 | ||
| 2622 | HLXU | HAPAG LLOYD A G | SCAC4 | ||
| 2623 | HLYS | HOLLYS SUPER GAS | SCAC4 | ||
| 2624 | HLYX | Holly Sugar Corp. | 1/1950-10/1966; eliminated 7/1968 | NAKINA | |
| 2625 | HLYX | Holly Sugar Corp. | 1/52-10/66; eliminated 7/68 | NRHS | |
| 2626 | HLYX | HOLLY SUGAR CORP. | PWRC | ||
| 2627 | HLZA | HOLZMAN TRUCKING INC | SCAC4 | ||
| 2628 | HLZC | HILTZ, CAM TRUCKING | SCAC4 | ||
| 2629 | HLZM | HOLTZ, MIKE TRUCKING | SCAC4 | ||
| 2630 | HLZN | HERMANOS LOZANO TRUCKING | SCAC4 | ||
| 2631 | HLZO | HOLTZMAN OIL CORP | SCAC4 | ||
| 2632 | HLZR | HILTZ MOVING & STORAGE INC | SCAC4 | ||
| 2633 | HLZT | HALZIT (MARATHON ASHLAND PETROLEUM | SCAC4 | ||
| 2634 | HM | Hasselmann GmbH | DE | VKM | |
| 2635 | HMA | Air Tahoma | ICAO1 | ||
| 2636 | HMAA | HAL-MARI INC | SCAC4 | ||
| 2637 | HMAB | HIGH MOUNTAIN TRANSPORT INC | SCAC4 | ||
| 2638 | HMAD | HARDIN DELIVERY INC | SCAC4 | ||
| 2639 | HMAE | H M TRUCKING | SCAC4 | ||
| 2640 | HMAF | British Armed Forces | Her Majesty's Armed Forces | GB | TRAFFIC |
| 2641 | HMAG | HOME AGAIN INC | SCAC4 | ||
| 2642 | HMAH | HERBERT, MARCIA | SCAC4 | ||
| 2643 | HMAI | HAMORI AUTO INC | SCAC4 | ||
| 2644 | HMAL | HARMAC AMERICA INC | SCAC4 | ||
| 2645 | HMAM | HER-MAN TRANSFER | SCAC4 | ||
| 2646 | HMAN | H. Manhart GmbH | AT | VKM | |
| 2647 | HMAO | HUNTSVILLE MARINE AND RECREATION | SCAC4 | ||
| 2648 | HMAP | HARDESTY MOVING AND STORAGE CORP | SCAC4 | ||
| 2649 | HMAQ | H M TRANSPORT | SCAC4 | ||
| 2650 | HMAR | HOMAR ENTERPRISES LIMITED | SCAC4 | ||
| 2651 | HMAS | HOMAN, D S | SCAC4 | ||
| 2652 | HMAX | Huntsman Petrochemical Corp. | added 4/2003; 7/2005 | NAKINA | |
| 2653 | HMAX | Huntsman Corp. | added 4/1996; 7/2000; eliminated 4/2003 | NAKINA | |
| 2654 | HMAX | Huntsman Specialty Chemicals Corp. | added 7/1994; eliminated 4/1996 | NAKINA | |
| 2655 | HMAX | Huntsman Specialty Chemicals Corp. | added 7/94; eliminated 4/96 | NRHS | |
| 2656 | HMAX | Huntsman Corp. | added 4/96; 7/2000 | NRHS | |
| 2657 | HMAX | HUNTSMAN SPECIALTY CHEMICALS CORPORATION (HUNTSMAN PETROCHEMICAL) | PWRC | ||
| 2658 | HMAX | Huntsman Petrochemical | RSRV | ||
| 2659 | HMAX | HUNTSMAN PETROCHEMICAL CORPORATION | SCAC4 | ||
| 2660 | HMAY | HASKELL, M A & SONS LLC | SCAC4 | ||
| 2661 | HMB | Härtsfeld-Museumsbahn e.V. | Neresheim | D | privat-bahn.de |
| 2662 | HMBAU | H&M Bau GmbH | DE | VKM | |
| 2663 | HMBC | HAMBONE TRUCKING LLC | SCAC4 | ||
| 2664 | HMBD | HAMILTON CONSTRUCTION LLC | SCAC4 | ||
| 2665 | HMBE | HAMMONIA REEDERE | SCAC4 | ||
| 2666 | HMBI | HOMAN & CO INC | SCAC4 | ||
| 2667 | HMBK | H M B TRUCKING | SCAC4 | ||
| 2668 | HMBS | HALCOMB, R & J TRANSPORTATION INC | SCAC4 | ||
| 2669 | HMBX | HELM Financial Corp. | added 1/2007 | NAKINA | |
| 2670 | HMBX | HELM FINANCIAL CORP. | PWRC | ||
| 2671 | HMBX | HELM FINANCIAL CORPORATION | SCAC4 | ||
| 2672 | HMBY | H & M BAY INC | SCAC4 | ||
| 2673 | HMBZ | HELLMANS BREWING CO. | PWRC | ||
| 2674 | HMC | Heliamerica De Mexico | ICAO1 | ||
| 2675 | HMCA | HOFFER, PETER CONTEMPORARY ART INC | SCAC4 | ||
| 2676 | HMCD | HERMAN FARM | SCAC4 | ||
| 2677 | HMCE | HIS MAJESTY COACHES INC | SCAC4 | ||
| 2678 | HMCG | H M C TRANSPORTATION INC | SCAC4 | ||
| 2679 | HMCH | HEARTLAND MOTOR COACH INC | SCAC4 | ||
| 2680 | HMCI | HEWES MARINE CO INC | SCAC4 | ||
| 2681 | HMCJ | HAGIE MANUFACTURING CO INC | SCAC4 | ||
| 2682 | HMCO | HAIRE MACHINE CORPORATION | SCAC4 | ||
| 2683 | HMCP | HENKE MANUFACTURING CORPORATION | SCAC4 | ||
| 2684 | HMCQ | H & M CONTAINER TRANSPORT INC | SCAC4 | ||
| 2685 | HMCR | The Huntsville and Madison County R.R. Authority | added 7/1985; 1/1994; eliminated 4/1997; 7/2000-7/2005 | NAKINA | |
| 2686 | HMCR | The Huntsville and Madison County R.R. Authority | 1/94; eliminated 4/97; 7/2000 | NRHS | |
| 2687 | HMCR | HUNTSVILLE & MADISON COUNTY RR AUTHORITY | PWRC | ||
| 2688 | HMCR | Huntsville and Madison County Railroad | RSRV | ||
| 2689 | HMCT | HAMILL CREEK TIMBERWRIGHTS INC | SCAC4 | ||
| 2690 | HMCU | HATSU MARINE LTD | SCAC4 | ||
| 2691 | HMCX | SC Rail Leasing America, Inc. d/b/a Southern Illinois Railcar Co. | added 1/2008 | NAKINA | |
| 2692 | HMCX | Southern Illinois Railcar Co. | added 4/2004; 7/2005; eliminated 1/2008 | NAKINA | |
| 2693 | HMCX | HoltraChem Manufacturing Co., L.L.C. | added 7/1995; eliminated 7/1997; 7/2000 (not listed) | NAKINA | |
| 2694 | HMCX | HoltraChem Manufacturing Co., L.L.C. | added 7/95; eliminated 7/97; 7/2000 | NRHS | |
| 2695 | HMCX | *HOLTRACHEM MANUFACTURING CO., LLC | PWRC | ||
| 2696 | HMCX | +SC RAIL LEASING AMERICA d/b/a SOUTHERN ILLINOIS RAILCAR CO. | PWRC | ||
| 2697 | HMCX | HoltraChem Manufacturing | RSRV | ||
| 2698 | HMCX | VTG RAIL INC | SCAC4 | ||
| 2699 | HMCY | HOFFMANN MACHINE COMPANY INC | SCAC4 | ||
| 2700 | HMD | Charlie Hammonds Flying Service | ICAO1 |