| 1 | HYA | Hyack Air | ICAO1 | ||
| 2 | HYAJ | HYATT, JIM PRODUCE CO INC | SCAC4 | ||
| 3 | HYAP | HYDRA TRANSPORTATION | SCAC4 | ||
| 4 | HYAR | HILLYARD FARMS | SCAC4 | ||
| 5 | HYAT | HYBRID TRANSIT SYSTEMS INC | SCAC4 | ||
| 6 | HYAU | PETROCHEMICA | SCAC4 | ||
| 7 | HYBB | HOLIWAY TRANSPORT | SCAC4 | ||
| 8 | HYBD | HYBUR LTD | SCAC4 | ||
| 9 | HYBE | HYBELS, BERT R INC | SCAC4 | ||
| 10 | HYBH | HARDY BROTHERS INC | SCAC4 | ||
| 11 | HYBI | HYBRID INTERMODAL TRANSPORTATION LL | SCAC4 | ||
| 12 | HYBL | HYBRID LOGISTICS INC | SCAC4 | ||
| 13 | HYBM | HAPPY BURRITO, THE | SCAC4 | ||
| 14 | HYBS | HONEYCOMB MAILING SERVICES LIMITED | SCAC4 | ||
| 15 | HYBU | HYBUR LTD | SCAC1 | ||
| 16 | HYBU | HYBUR LTD | SCAC4 | ||
| 17 | HYC | Hydro Air Flight Operations | ICAO1 | ||
| 18 | HYCB | HYMARK EXPRESS INC | SCAC4 | ||
| 19 | HYCC | HAPPY YELLOW CHECKER CAB | SCAC4 | ||
| 20 | HYCD | HAYCOCK DISTRIBUTING CO INC | SCAC4 | ||
| 21 | HYCI | HAY, CLIFFORD C INC | SCAC4 | ||
| 22 | HYCK | HAY CREEK EXPRESS INC | SCAC4 | ||
| 23 | HYCM | HYDRO CHEM INDUSTRIAL SERVICES INC | SCAC4 | ||
| 24 | HYCO | HUSKEY BUS & TRANSPORTATION SERVICE | SCAC4 | ||
| 25 | HYCQ | HOMETOWN ENERGY LLC | SCAC4 | ||
| 26 | HYCT | HUNEYCUTT TRANSPORT | SCAC4 | ||
| 27 | HYCW | HAYWORTH, C & V TRUCKING CO | SCAC4 | ||
| 28 | HYD | Hydro-QuA~©bec | ICAO1 | ||
| 29 | HYDA | HYDER TRANSPORTATION LLC | SCAC4 | ||
| 30 | HYDB | HYDER BOYS TRANSPORT LLC | SCAC4 | ||
| 31 | HYDC | HAYDEN TRANSPORTATION LLC | SCAC4 | ||
| 32 | HYDD | HIGIENICOS Y DESECHABLES DEL BAJIO | SCAC4 | ||
| 33 | HYDG | HYDE, GENE TRUCKING CO INC | SCAC4 | ||
| 34 | HYDK | HAYDUK ENTERPRISES INC | SCAC4 | ||
| 35 | HYDL | HYDE, GENE LOGISTICS INC | SCAC4 | ||
| 36 | HYDN | HAYDEN TRANSPORT INC | SCAC4 | ||
| 37 | HYDP | HYDRO TECHNOLOGIES (CANADA) INC | SCAC4 | ||
| 38 | HYDR | HYDRAULICS UNLIMITED | SCAC4 | ||
| 39 | HYDR | Hydrema Baumaschinen GmbH | DE | VKM | |
| 40 | HYDS | HYDROUSSA SHIPPING CO. S A | SCAC4 | ||
| 41 | HYDU | HYDE SHIPPING | SCAC1 | ||
| 42 | HYDU | Hyundai | SCAC2 | ||
| 43 | HYDU | AMPHIBIOUS CONTAINERS LEASING LTD | SCAC4 | ||
| 44 | HYDX | Praxair, Inc. | added 1/1993; 1/1994-7/2005 | NAKINA | |
| 45 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 1/1993 | NAKINA | |
| 46 | HYDX | Union Carbide Corp. | added 5/1983 | NAKINA | |
| 47 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 5/1983 | NAKINA | |
| 48 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 10/1980 | NAKINA | |
| 49 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/1980 | NAKINA | |
| 50 | HYDX | Union Carbide Corp. | eliminated 10/1980 | NAKINA | |
| 51 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/1980 | NAKINA | |
| 52 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 1/1979; 1/1980; eliminated 7/1980 | NAKINA | |
| 53 | HYDX | Union Carbide Corp., Chemicals and Plastics Operations Division | added 1/1968; 4/1970-1/1975; eliminated 1/1979 | NAKINA | |
| 54 | HYDX | Union Carbide Corp., Chemicals and Plastics | added 10/1967; eliminated 1/1968 | NAKINA | |
| 55 | HYDX | Union Carbide Corp., Chemicals Division | added 7/1961; 7/1965-10/1966; eliminated 10/1967 | NAKINA | |
| 56 | HYDX | Union Carbide Corp., Chemicals Division | 7/65-10/66; eliminated 10/67 | NRHS | |
| 57 | HYDX | Union Carbide Corp., Chemicals and Plastics | added 10/67; eliminated 1/68 | NRHS | |
| 58 | HYDX | Union Carbide Corp., Chemicals and Plastics Operations Division | added 1/68; 4/70-1/75; eliminated 1/79 | NRHS | |
| 59 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 1/79; 1/80; eliminated 7/80 | NRHS | |
| 60 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/80 | NRHS | |
| 61 | HYDX | Union Carbide Corp. | eliminated 10/80 | NRHS | |
| 62 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/80 | NRHS | |
| 63 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 10/80 | NRHS | |
| 64 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 5/83 | NRHS | |
| 65 | HYDX | Union Carbide Corp. | added 5/83 | NRHS | |
| 66 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 1/93 | NRHS | |
| 67 | HYDX | Praxair, Inc. | added 1/93; 1/94-7/2000 | NRHS | |
| 68 | HYDX | (UCOX) PRAXAIR, INC. [UNION CARBIDE CORP.] | PWRC | ||
| 69 | HYDX | Union Carbide Corporation (Praxair) | RSRV | ||
| 70 | HYDX | PRAXAIR, INC. | SCAC4 | ||
| 71 | HYEC | HAYLES EXPRESS CARRIER | SCAC4 | ||
| 72 | HYED | HARDY, EDWIN TRUCKING INC | SCAC4 | ||
| 73 | HYEG | HERRERA, YEGUADA | SCAC4 | ||
| 74 | HYES | HAYES, STEPHEN | SCAC4 | ||
| 75 | HYFA | HERBTHYME FARMS | SCAC4 | ||
| 76 | HYFC | HYDE FUEL CO | SCAC4 | ||
| 77 | HYFM | HYMAN FARMS TRUCKING | SCAC4 | ||
| 78 | HYGR | HYGRID LOGISTICS INC | SCAC4 | ||
| 79 | HYGX | North American Car Corp. | 4/1947-7/1965; eliminated 10/1965 | NAKINA | |
| 80 | HYGX | North American Car Corp. | 1/52-7/65; eliminated 10/65 | NRHS | |
| 81 | HYGX | NORTH AMERICAN CAR CORP. | PWRC | ||
| 82 | HYH | Heli Hungary | ICAO1 | ||
| 83 | HYHI | HAILEYS HAULING INC | SCAC4 | ||
| 84 | HYHY | HAYES & HAYES TRUCKING INC | SCAC4 | ||
| 85 | HYIL | HYATT INDUSTRIES LIMITED | SCAC4 | ||
| 86 | HYJA | HAYNES, JOHN A TRUCKING | SCAC4 | ||
| 87 | HYJC | HURLEY, J C | SCAC4 | ||
| 88 | HYJE | HAYWARD, JEFF | SCAC4 | ||
| 89 | HYJF | HYJAK FARMS | SCAC4 | ||
| 90 | HYJS | HEANEY, JOHN S | SCAC4 | ||
| 91 | HYKL | HOYT, KRIS L | SCAC4 | ||
| 92 | HYLA | HYLAND, M TRADESHOW & EXHIBITS CARR | SCAC4 | ||
| 93 | HYLC | HAYSTATION LLC, THE | SCAC4 | ||
| 94 | HYLG | HAYES LOGISTICS | SCAC4 | ||
| 95 | HYLI | HY-LINE EXPRESS LTD | SCAC4 | ||
| 96 | HYLK | HYTEK LTD | SCAC4 | ||
| 97 | HYLS | HYLENES TRANSPORT SERVICES LLC | SCAC4 | ||
| 98 | HYLT | HYL TRANSPORTATION LTD | SCAC4 | ||
| 99 | HYMF | HYMAN FREIGHTWAYS, INC | SCAC1 | ||
| 100 | HYMN | HONGYUAN MARINE CO LTD | SCAC4 |