| 5101 | HYPO | HYPONEX CORPORATION | SCAC4 | ||
| 5102 | HYPP | HYPER SPORT LLC | SCAC4 | ||
| 5103 | HYPR | HYPER TRUCKING INC | SCAC4 | ||
| 5104 | HYPT | HI-YIELD PRODUCTS | SCAC4 | ||
| 5105 | HYPW | HYGEIA SHIPPING & TRADING CO LTD | SCAC4 | ||
| 5106 | HYPZ | HI YIELD PRODUCTS | PWRC | ||
| 5107 | HYR | Airlink Airways | ICAO1 | ||
| 5108 | HYRA | HYDRA TRUCKING INC | SCAC4 | ||
| 5109 | HYRD | HARDYS SEAFOOD | SCAC4 | ||
| 5110 | HYRQ | HUYEAR TRUCKING INC | SCAC4 | ||
| 5111 | HYSE | HYSE TRUCKING INC | SCAC4 | ||
| 5112 | HYSH | HYDE SHIPPING CORPORATION | SCAC4 | ||
| 5113 | HYSL | HECNY SHIPPING LIMITED | SCAC4 | ||
| 5114 | HYSQ | HUSKY SYSTEMS INC | SCAC4 | ||
| 5115 | HYTA | HYTRACKER MANUFACTURING LTD | SCAC4 | ||
| 5116 | HYTI | HIGHWAY TRANSPORT SERVICES INC | SCAC4 | ||
| 5117 | HYTK | HANEY TRUCKING INC | SCAC4 | ||
| 5118 | HYTL | HYDROTESTORS 2000 LTD | SCAC4 | ||
| 5119 | HYTP | HIGHWAY TRANSPORT PETROLEUM LLC | SCAC4 | ||
| 5120 | HYTT | HIGHWAY TRANSPORT LOGISTICS INC | SCAC4 | ||
| 5121 | HYTX | Hytrans, Inc. | added 7/1977; 1/1980; eliminated 10/1983 | NAKINA | |
| 5122 | HYTX | Hygrade Food Products Corp. | 4/1947-7/1954; eliminated 10/1954 | NAKINA | |
| 5123 | HYTX | Hygrade Food Products Corp. | Jan-52 | NRHS | |
| 5124 | HYTX | Hytrans, Inc. | added 7/77; 1/80; eliminated 10/83 | NRHS | |
| 5125 | HYTX | HYGRADE FOOD PRODUCTS CORP. | PWRC | ||
| 5126 | HYUD | HYUNDAI LOGISTICS CO LTD | SCAC4 | ||
| 5127 | HYUK | HAMADA, YUK, COMPANY | SCAC1 | ||
| 5128 | HYUK | HAMADA, YUK CO INC | SCAC4 | ||
| 5129 | HYUN | HYUNDAI MERCHANTS MARINE, INC. | PWRC | ||
| 5130 | HYUN | HYUN DAE TRUCKING CO | SCAC4 | ||
| 5131 | HYVE | HY-VEE FOOD STORES INC | SCAC4 | ||
| 5132 | HYWC | HYWAY CORPORATION INC, THE | SCAC4 | ||
| 5133 | HYWK | Hyway Trucking | SCAC2 | ||
| 5134 | HYWK | HYWAY TRUCKING CO | SCAC4 | ||
| 5135 | HYWX | Georgia Power Co. | added 4/1999; 7/2000-7/2005 | NAKINA | |
| 5136 | HYWX | Georgia Power Co. | added 4/99; 7/2000 | NRHS | |
| 5137 | HYWX | GEORGIA POWER CO. | PWRC | ||
| 5138 | HYWX | Georgia Power | RSRV | ||
| 5139 | HYWX | GEORGIA POWER COMPANY | SCAC4 | ||
| 5140 | HYXI | HUSKY TRANSPORT INC | SCAC4 | ||
| 5141 | HYXT | HUEY TRANSPORT | SCAC4 | ||
| 5142 | HZ | HR | TRAFFIC | ||
| 5143 | HZ | Hrvatske Željeznice | HR | VKM | |
| 5144 | HZA | Horizon Airlines | IATA: BN | ICAO1 | |
| 5145 | HZAI | HZT INTERNATIONAL INC | SCAC4 | ||
| 5146 | HZAR | HUZAR LOGISITCS INC | SCAC4 | ||
| 5147 | HZBN | HERNANDEZ, BENJAMIN | SCAC4 | ||
| 5148 | HZCAR | HŽ CARGO d.o.o. | HR | VKM | |
| 5149 | HZCH | HERNANDEZ ORTIZ, JOSE ALFREDO | SCAC4 | ||
| 5150 | HZCI | HERNANDEZ RUIZ, ARTURO | SCAC4 | ||
| 5151 | HZEC | HORIZON ENTERTAINMENT CARGO CO | SCAC4 | ||
| 5152 | HZEG | HAZMAT ENVIRONMENTAL GROUP INC | SCAC4 | ||
| 5153 | HZEL | HAZEL TRUCKING CORPORATION | SCAC4 | ||
| 5154 | HZEN | HAZEN TRANSPORT INC | SCAC4 | ||
| 5155 | HZEP | HINZ ENTERPRISES LLC | SCAC4 | ||
| 5156 | HZER | HAZER ENTERPRISES INC | SCAC4 | ||
| 5157 | HZGT | HERZOG TRUCKING INC | SCAC4 | ||
| 5158 | HZGV | HERNANDEZ GARCIA, VIOLETA | SCAC4 | ||
| 5159 | HZGX | Herzog Contracting Corp. | added 7/1991; 1/1994-7/2005 | NAKINA | |
| 5160 | HZGX | Herzog Contracting Corp. | added 7/91; 1/94-7/2000 | NRHS | |
| 5161 | HZGX | HERZOG CONTRACTING CORPORATION | PWRC | ||
| 5162 | HZGX | Herzog Contracting Corporation | RSRV | ||
| 5163 | HZGX | HERZOG RAILROAD SERVICES INC | SCAC4 | ||
| 5164 | HZHS | HAZELS HOTSHOT SERVICE | SCAC4 | ||
| 5165 | HZJE | HERNANDEZ, JUAN E INC | SCAC4 | ||
| 5166 | HZKL | HOUTZ TRUCKING LLC | SCAC4 | ||
| 5167 | HZL | Hazelton Airlines | ICAO1 | ||
| 5168 | HzL | Hohenzollerische Landesbahn AG | Hechingen | D | privat-bahn.de |
| 5169 | HZL | Hohenzollerische Landesbahn AG | D | TRAFFIC | |
| 5170 | HZL | Hohenzollerische Landesbahn | DE | VKM | |
| 5171 | HZLA | Hazelton Airlines | AUS | TRAFFIC | |
| 5172 | HZLC | HORIZON LOGISTICS LLC | SCAC4 | ||
| 5173 | HZLG | HAZMAT LOGISTICS INC | SCAC4 | ||
| 5174 | HZLS | HORIZON LIMOUSINE SERVICE | SCAC4 | ||
| 5175 | HZMA | HORIZON MOTOR COACH INC | SCAC4 | ||
| 5176 | HZMC | HORIZON MARINE CORPORATION | SCAC4 | ||
| 5177 | HZMG | HORIZON MOVING & STORAGE | SCAC4 | ||
| 5178 | HZNA | HORIZON AIR SERVICES INC | SCAC4 | ||
| 5179 | HZND | HORIZON DISTRIBUTION INC | SCAC4 | ||
| 5180 | HZNF | HORIZON FREIGHT SYSTEM INC | SCAC4 | ||
| 5181 | HZNL | HOLTZMAN PROPANE LLC | SCAC4 | ||
| 5182 | HZNS | HORIZONA SHIPPING CO LTD MALTA | SCAC4 | ||
| 5183 | HZNT | HINZ TRUCKING INC | SCAC4 | ||
| 5184 | HZNV | HORIZON VAN LINES INC | SCAC4 | ||
| 5185 | HZOP | HUAZO TRANSPORT | SCAC4 | ||
| 5186 | HZPP | HŽ Putnički prijevoz | HR | TRAFFIC | |
| 5187 | HZPP | HŽ PUTNIČKI PRIJEVOZ d.o.o. | HR | VKM | |
| 5188 | HZPR | HAZPRO TRANSPORTATION LLC | SCAC4 | ||
| 5189 | HZRA | HERNANDEZ RODRIGUEZ, ALBERTO | SCAC4 | ||
| 5190 | HZRD | HERTZ, ROGER TRUCKING INC | SCAC4 | ||
| 5191 | HZRK | HERNANDEZ, R TRUCKING | SCAC4 | ||
| 5192 | HZT | Air Horizon | IATA: 8C | ICAO1 | |
| 5193 | HZTG | HORIZON TRANSPORTATION SERVICES/HTS | SCAC4 | ||
| 5194 | HZTI | HORIZON TRANSPORT INC | SCAC4 | ||
| 5195 | HZTN | HORIZON TESTING INC | SCAC4 | ||
| 5196 | HZTO | HORZEN, T REFRIGERATED TRANSPORT IN | SCAC4 | ||
| 5197 | HZTP | HORIZON TRANSPORTATION INC | SCAC4 | ||
| 5198 | HZTS | HORIZON TRANSPORTATION SERVICES INC | SCAC4 | ||
| 5199 | HZUS | HARTWELL DZUS SA DE CV | SCAC4 | ||
| 5200 | HZVV | HŽ VUČA VLAKOVA | HR | VKM |