| 201 | HAMU | COSTA LINE | PWRC | ||
| 202 | HAMU | Costa Line | RSRV | ||
| 203 | HAMU | CP SHIPS | SCAC4 | ||
| 204 | HAMV | HAMLETT, VAN E | SCAC4 | ||
| 205 | HAMX | North American Car Corp. | added 10/1964; 7/1965-1/1975; eliminated 1/1977 | NAKINA | |
| 206 | HAMX | North American Car Corp. | 7/65-1/75; eliminated 1/77 | NRHS | |
| 207 | HAMX | NORTH AMERICAN CAR CORP. | PWRC | ||
| 208 | HAN | Hansung Airlines | ICAO1 | ||
| 209 | HAN | Hanson Aggregates UK | GB | TRAFFIC | |
| 210 | HANA | HANSA LINE | PWRC | ||
| 211 | HANA | HANA EXPRESS A DIV OF HANAKO INC | SCAC4 | ||
| 212 | HANB | HANIFEN COMPANY INC | SCAC4 | ||
| 213 | HAND | HANSON TRUCKING CO | SCAC4 | ||
| 214 | HANF | HANSON FUEL COMPANY INC | SCAC4 | ||
| 215 | HANG | HANA GLOBAL INC | SCAC4 | ||
| 216 | HANG | Hangartner AG. | CH | TRAFFIC | |
| 217 | HANH | HIDEAWAY ANTIQUES | SCAC4 | ||
| 218 | HANJ | HANJIN EXPRESS | SCAC4 | ||
| 219 | HANKAI | Hankai Tramway Co. | City: Osaka, Sakai | J | TRAFFIC |
| 220 | HANM | HANM TRANSPORTATION MANAGEMENT SERV | SCAC4 | ||
| 221 | HANO | HANDS OF AMERICA INC | SCAC4 | ||
| 222 | HANQ | HANA LOGISTICS | SCAC4 | ||
| 223 | HANR | HANSENS, L FORWARDING LTD | SCAC4 | ||
| 224 | HANS | HANSON TRANSPORT, INC | SCAC1 | ||
| 225 | HANS | HANJIN SHIPPING CO LTD (BULK DIVISI | SCAC4 | ||
| 226 | HANS | Hanseatische Eisenbahn-Gesellschaft | D | TRAFFIC | |
| 227 | HANT | HANAN TRANSPORT | SCAC4 | ||
| 228 | HANU | HANSA LINE | PWRC | ||
| 229 | HANU | Hansa Line | RSRV | ||
| 230 | HANU | HANAN SHIPPING LLC | SCAC4 | ||
| 231 | HANV | HAVEDINGS, ANKO | SCAC4 | ||
| 232 | HANX | L. Hansen's Forwarding | 7/2000-7/2005 (not listed) | NAKINA | |
| 233 | HANX | Hancock Oil Co. of California | 7/1930-4/1947 | NAKINA | |
| 234 | HANX | Hancock Oil Co. of California | Apr-38 | NRHS | |
| 235 | HANX | L. Hansen's Forwarding | Jul-00 | NRHS | |
| 236 | HANX | *HANCOCK OIL CO. OF CALIFORNIA | PWRC | ||
| 237 | HANX | +L. HANSENS FORWARDING | PWRC | ||
| 238 | HANX | L. Hansen's Forwarding | RSRV | ||
| 239 | HANX | HANSENS, L FORWARDING | SCAC4 | ||
| 240 | HANY | HANEY TRUCK LINE | SCAC4 | ||
| 241 | HAOC | HUNTER-ASH OIL CO INC | SCAC4 | ||
| 242 | HAOI | HARRIS OIL COMPANY INC | SCAC4 | ||
| 243 | HAOS | HAGELAND AVIATION SERVICES INC | SCAC4 | ||
| 244 | HAOT | HARGIN TRANSPORT LLC | SCAC4 | ||
| 245 | HAOY | HAWKINS OIL COMPANY OF LA GRANGE IN | SCAC4 | ||
| 246 | HAP | Helicopteros Aero Personal | ICAO1 | ||
| 247 | HAPA | HAPPY AUNTIE S A | SCAC4 | ||
| 248 | HAPC | HILL AND PERRY, INC | SCAC4 | ||
| 249 | HAPE | HAP ENTERPRISES LTD | SCAC4 | ||
| 250 | HAPG | HAMBURG-AMERICAN LINE | PWRC | ||
| 251 | HAPG | HAMBURG AMERICAN LINE | SCAC4 | ||
| 252 | HAPL | HAPPY TRANSPORT LLC | SCAC4 | ||
| 253 | HAPM | HAPPACH MARINE LTD | SCAC4 | ||
| 254 | HAPN | HAMPDEN MOVING & STORAGE INC | SCAC4 | ||
| 255 | HAPP | HAPPY TRUCKING INC | SCAC4 | ||
| 256 | HAPR | HARRIS TRANSPORT COMPANY | SCAC1 | ||
| 257 | HAPR | HARRIS TRANSPORT COMPANY | SCAC4 | ||
| 258 | HAPT | HARMS PACIFIC TRANSPORT INC | SCAC4 | ||
| 259 | HAPU | H A P FOODS HOLLAND B V | SCAC4 | ||
| 260 | HAPW | HARP, WAYNE TRUCKING INC | SCAC4 | ||
| 261 | HAPX | Helm-Atlantic Leasing Limited Partnership | 7/2000-7/2005 (not listed) | NAKINA | |
| 262 | HAPX | Helm-Atlantic Leasing Limited Partnership | Jul-00 | NRHS | |
| 263 | HAPX | HELM-ATLANTIC LEASING, LP | PWRC | ||
| 264 | HAPX | Helm-Atlantic Leasing | RSRV | ||
| 265 | HAPX | HELM ATLANTIC LEASING LIMITED PARTN | SCAC4 | ||
| 266 | HAQI | HEROIC AQUILA INC | SCAC4 | ||
| 267 | HAQY | HAYNES, JOHN S TRUCKING CO INC | SCAC4 | ||
| 268 | HAR | Harbor Airlines | IATA: HB | ICAO1 | |
| 269 | HARC | HARVEST CA | SCAC4 | ||
| 270 | HARD | HARLESS, DICK L | SCAC4 | ||
| 271 | HARE | HARRIS, CHARLES | SCAC4 | ||
| 272 | HARF | HAR-TRANS FREIGHT | SCAC4 | ||
| 273 | HARI | HARRIS, RICHARD L | SCAC4 | ||
| 274 | HARK | HARPER TRUCK LINE INC | SCAC4 | ||
| 275 | HARM | HARMUN TRUCKING INC | SCAC4 | ||
| 276 | HARO | HARMAN TRANSPORTATION | SCAC4 | ||
| 277 | HARP | HARPA | SCAC4 | ||
| 278 | HARR | HARRIER SHIPPING COMPANY LIMITED | SCAC4 | ||
| 279 | HARRIS | Harris Bus | GB | TRAFFIC | |
| 280 | HARS | HARRIS EXPRESS INC | PWRC | ||
| 281 | HART | Huntington Area Rapid Transit | USA | TRAFFIC | |
| 282 | HARTON | Harton Coal Company | GB | TRAFFIC | |
| 283 | HARU | CHARENTE STEAMSHIP CO., LTD | SCAC3 | ||
| 284 | HARV | HARVEY TRANSPORT LTD | SCAC4 | ||
| 285 | HARX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | NAKINA | |
| 286 | HARX | General Electric Railcar Services Corp. | added 4/1992; 1/1994; eliminated 1/2000 | NAKINA | |
| 287 | HARX | Hargis Railcar, Inc. | added 7/1989; eliminated 4/1992 | NAKINA | |
| 288 | HARX | Harcon Corp. | added 1/1964 | NAKINA | |
| 289 | HARX | Harriman Co. | 7/1930-7/1935 | NAKINA | |
| 290 | HARX | Hargis Railcar, Inc. | added 7/89; eliminated 4/92 | NRHS | |
| 291 | HARX | General Electric Railcar Services Corp. | added 4/92; 1/94; eliminated 1/2000 | NRHS | |
| 292 | HARX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | NRHS | |
| 293 | HARX | *HARRIMAN CO. | PWRC | ||
| 294 | HARX | +(NATX) GENERAL ELECTRIC RAIL SERVICES CORPORATION [HARGIS RAILCAR, INC.] | PWRC | ||
| 295 | HARX | *HAWAII RAILWAY, INC. | PWRC | ||
| 296 | HARX | GE Rail Services Corporation | RSRV | ||
| 297 | HARX | GENERAL ELECTRIC RAILCAR SERVICES C | SCAC4 | ||
| 298 | HARZ | HARRISON RADIATOR | PWRC | ||
| 299 | HAS | Honduras Airlines | ICAO1 | ||
| 300 | HASC | HAULIN A & S | SCAC4 |