| 5001 | HYBH | HARDY BROTHERS INC | SCAC4 | ||
| 5002 | HYBI | HYBRID INTERMODAL TRANSPORTATION LL | SCAC4 | ||
| 5003 | HYBL | HYBRID LOGISTICS INC | SCAC4 | ||
| 5004 | HYBM | HAPPY BURRITO, THE | SCAC4 | ||
| 5005 | HYBS | HONEYCOMB MAILING SERVICES LIMITED | SCAC4 | ||
| 5006 | HYBU | HYBUR LTD | SCAC1 | ||
| 5007 | HYBU | HYBUR LTD | SCAC4 | ||
| 5008 | HYC | Hydro Air Flight Operations | ICAO1 | ||
| 5009 | HYCB | HYMARK EXPRESS INC | SCAC4 | ||
| 5010 | HYCC | HAPPY YELLOW CHECKER CAB | SCAC4 | ||
| 5011 | HYCD | HAYCOCK DISTRIBUTING CO INC | SCAC4 | ||
| 5012 | HYCI | HAY, CLIFFORD C INC | SCAC4 | ||
| 5013 | HYCK | HAY CREEK EXPRESS INC | SCAC4 | ||
| 5014 | HYCM | HYDRO CHEM INDUSTRIAL SERVICES INC | SCAC4 | ||
| 5015 | HYCO | HUSKEY BUS & TRANSPORTATION SERVICE | SCAC4 | ||
| 5016 | HYCQ | HOMETOWN ENERGY LLC | SCAC4 | ||
| 5017 | HYCT | HUNEYCUTT TRANSPORT | SCAC4 | ||
| 5018 | HYCW | HAYWORTH, C & V TRUCKING CO | SCAC4 | ||
| 5019 | HYD | Hydro-QuA~©bec | ICAO1 | ||
| 5020 | HYDA | HYDER TRANSPORTATION LLC | SCAC4 | ||
| 5021 | HYDB | HYDER BOYS TRANSPORT LLC | SCAC4 | ||
| 5022 | HYDC | HAYDEN TRANSPORTATION LLC | SCAC4 | ||
| 5023 | HYDD | HIGIENICOS Y DESECHABLES DEL BAJIO | SCAC4 | ||
| 5024 | HYDG | HYDE, GENE TRUCKING CO INC | SCAC4 | ||
| 5025 | HYDK | HAYDUK ENTERPRISES INC | SCAC4 | ||
| 5026 | HYDL | HYDE, GENE LOGISTICS INC | SCAC4 | ||
| 5027 | HYDN | HAYDEN TRANSPORT INC | SCAC4 | ||
| 5028 | HYDP | HYDRO TECHNOLOGIES (CANADA) INC | SCAC4 | ||
| 5029 | HYDR | HYDRAULICS UNLIMITED | SCAC4 | ||
| 5030 | HYDR | Hydrema Baumaschinen GmbH | DE | VKM | |
| 5031 | HYDS | HYDROUSSA SHIPPING CO. S A | SCAC4 | ||
| 5032 | HYDU | HYDE SHIPPING | SCAC1 | ||
| 5033 | HYDU | Hyundai | SCAC2 | ||
| 5034 | HYDU | AMPHIBIOUS CONTAINERS LEASING LTD | SCAC4 | ||
| 5035 | HYDX | Praxair, Inc. | added 1/1993; 1/1994-7/2005 | NAKINA | |
| 5036 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 1/1993 | NAKINA | |
| 5037 | HYDX | Union Carbide Corp. | added 5/1983 | NAKINA | |
| 5038 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 5/1983 | NAKINA | |
| 5039 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 10/1980 | NAKINA | |
| 5040 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/1980 | NAKINA | |
| 5041 | HYDX | Union Carbide Corp. | eliminated 10/1980 | NAKINA | |
| 5042 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/1980 | NAKINA | |
| 5043 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 1/1979; 1/1980; eliminated 7/1980 | NAKINA | |
| 5044 | HYDX | Union Carbide Corp., Chemicals and Plastics Operations Division | added 1/1968; 4/1970-1/1975; eliminated 1/1979 | NAKINA | |
| 5045 | HYDX | Union Carbide Corp., Chemicals and Plastics | added 10/1967; eliminated 1/1968 | NAKINA | |
| 5046 | HYDX | Union Carbide Corp., Chemicals Division | added 7/1961; 7/1965-10/1966; eliminated 10/1967 | NAKINA | |
| 5047 | HYDX | Union Carbide Corp., Chemicals Division | 7/65-10/66; eliminated 10/67 | NRHS | |
| 5048 | HYDX | Union Carbide Corp., Chemicals and Plastics | added 10/67; eliminated 1/68 | NRHS | |
| 5049 | HYDX | Union Carbide Corp., Chemicals and Plastics Operations Division | added 1/68; 4/70-1/75; eliminated 1/79 | NRHS | |
| 5050 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 1/79; 1/80; eliminated 7/80 | NRHS | |
| 5051 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/80 | NRHS | |
| 5052 | HYDX | Union Carbide Corp. | eliminated 10/80 | NRHS | |
| 5053 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | added 7/80 | NRHS | |
| 5054 | HYDX | Union Carbide Corp., Chemicals and Plastics Division | added 10/80 | NRHS | |
| 5055 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 5/83 | NRHS | |
| 5056 | HYDX | Union Carbide Corp. | added 5/83 | NRHS | |
| 5057 | HYDX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 1/93 | NRHS | |
| 5058 | HYDX | Praxair, Inc. | added 1/93; 1/94-7/2000 | NRHS | |
| 5059 | HYDX | (UCOX) PRAXAIR, INC. [UNION CARBIDE CORP.] | PWRC | ||
| 5060 | HYDX | Union Carbide Corporation (Praxair) | RSRV | ||
| 5061 | HYDX | PRAXAIR, INC. | SCAC4 | ||
| 5062 | HYEC | HAYLES EXPRESS CARRIER | SCAC4 | ||
| 5063 | HYED | HARDY, EDWIN TRUCKING INC | SCAC4 | ||
| 5064 | HYEG | HERRERA, YEGUADA | SCAC4 | ||
| 5065 | HYES | HAYES, STEPHEN | SCAC4 | ||
| 5066 | HYFA | HERBTHYME FARMS | SCAC4 | ||
| 5067 | HYFC | HYDE FUEL CO | SCAC4 | ||
| 5068 | HYFM | HYMAN FARMS TRUCKING | SCAC4 | ||
| 5069 | HYGR | HYGRID LOGISTICS INC | SCAC4 | ||
| 5070 | HYGX | North American Car Corp. | 4/1947-7/1965; eliminated 10/1965 | NAKINA | |
| 5071 | HYGX | North American Car Corp. | 1/52-7/65; eliminated 10/65 | NRHS | |
| 5072 | HYGX | NORTH AMERICAN CAR CORP. | PWRC | ||
| 5073 | HYH | Heli Hungary | ICAO1 | ||
| 5074 | HYHI | HAILEYS HAULING INC | SCAC4 | ||
| 5075 | HYHY | HAYES & HAYES TRUCKING INC | SCAC4 | ||
| 5076 | HYIL | HYATT INDUSTRIES LIMITED | SCAC4 | ||
| 5077 | HYJA | HAYNES, JOHN A TRUCKING | SCAC4 | ||
| 5078 | HYJC | HURLEY, J C | SCAC4 | ||
| 5079 | HYJE | HAYWARD, JEFF | SCAC4 | ||
| 5080 | HYJF | HYJAK FARMS | SCAC4 | ||
| 5081 | HYJS | HEANEY, JOHN S | SCAC4 | ||
| 5082 | HYKL | HOYT, KRIS L | SCAC4 | ||
| 5083 | HYLA | HYLAND, M TRADESHOW & EXHIBITS CARR | SCAC4 | ||
| 5084 | HYLC | HAYSTATION LLC, THE | SCAC4 | ||
| 5085 | HYLG | HAYES LOGISTICS | SCAC4 | ||
| 5086 | HYLI | HY-LINE EXPRESS LTD | SCAC4 | ||
| 5087 | HYLK | HYTEK LTD | SCAC4 | ||
| 5088 | HYLS | HYLENES TRANSPORT SERVICES LLC | SCAC4 | ||
| 5089 | HYLT | HYL TRANSPORTATION LTD | SCAC4 | ||
| 5090 | HYMF | HYMAN FREIGHTWAYS, INC | SCAC1 | ||
| 5091 | HYMN | HONGYUAN MARINE CO LTD | SCAC4 | ||
| 5092 | HYMT | HYMAN TRANSPORTATION | PWRC | ||
| 5093 | HYND | HAYNES TRANSFER | SCAC1 | ||
| 5094 | HYND | HAYNES TRANSFER | SCAC4 | ||
| 5095 | HYNJ | HYNDMAN, JACK TRUCKING | SCAC4 | ||
| 5096 | HYNS | HAYNES TRUCKING LLC | SCAC4 | ||
| 5097 | HYNT | HAYNES TRUCKING INC | SCAC4 | ||
| 5098 | HYOX | Highway Oil Refining Corp. | 7/1923-7/1930 | NAKINA | |
| 5099 | HYOX | HIGHWAY OIL REFINING CORP. | PWRC | ||
| 5100 | HYPN | HYPOR INC | SCAC4 |