| 3301 | HONX | +HONEYMEAD PRODUCTS COMPANY (DIV. HARVEST STATES COOP.) | PWRC | ||
| 3302 | HONX | Honeymead Products (Division of Harvest States Cooperatives) | RSRV | ||
| 3303 | HONX | HONEYMEAD PRODUCTS COMPANY (DIVN HA | SCAC4 | ||
| 3304 | HONX | Honeymead Products Co. | USA | TRAFFIC | |
| 3305 | HONY | HARMONY TRANSPORT INC | SCAC4 | ||
| 3306 | HOOB | HOOBER INC | SCAC4 | ||
| 3307 | HOOC | HOOKER CHEMICAL | PWRC | ||
| 3308 | HOOC | HOME OIL CO | SCAC4 | ||
| 3309 | HOOE | HOOSIER EXPRESS INC | SCAC4 | ||
| 3310 | HOOF | HOTFOOT GROUP LLC | SCAC4 | ||
| 3311 | HOOI | HOOIVELD SCHEEPVART EN TRANSPORT B | SCAC4 | ||
| 3312 | HOOO | HOOTEN OIL CO | SCAC4 | ||
| 3313 | HOOQ | HOOPS, WILLIAM F | SCAC1 | ||
| 3314 | HOOQ | HOOPS, WILLIAM F INC | SCAC4 | ||
| 3315 | HOOT | HOOSIER RACING TIRE CORP | SCAC4 | ||
| 3316 | HOPC | HAYES OIL CO | SCAC4 | ||
| 3317 | HOPF | HOOPES TURF FARM, INC | SCAC4 | ||
| 3318 | HOPK | HOPKINS & SONS INC | SCAC4 | ||
| 3319 | HOPN | HOPKINS OIL CO INC | SCAC4 | ||
| 3320 | HOPR | HORIZON TRANSPORTATION LLC | SCAC4 | ||
| 3321 | HOPS | HOPS, KARL INC | SCAC4 | ||
| 3322 | HOPX | Home Petroleum Co. | 8/1920 | NAKINA | |
| 3323 | HOPX | HOME PETROLEUM CO. | PWRC | ||
| 3324 | HOPZ | HORMEL PLANT PROPERTIES | PWRC | ||
| 3325 | HOQC | HOLLON OIL COMPANY | SCAC4 | ||
| 3326 | HOR | Horizon Air-Taxi | ICAO1 | ||
| 3327 | HORA | HOLMES, RUSS TRANSPORT INC | SCAC4 | ||
| 3328 | HORC | HEIRLOOM ORIENTAL RUG CLEANING LTD | SCAC4 | ||
| 3329 | HORI | HORN INTERNATIONAL FORWARDING INC | SCAC4 | ||
| 3330 | HORI | Hokuriku Railroad | J | TRAFFIC | |
| 3331 | HORK | HOTWORK-USA LLC | SCAC4 | ||
| 3332 | HORN | HORNSBY EXPRESS INC | SCAC4 | ||
| 3333 | HORNSBY | Hornsby Travel | City: Hornsby | GB | TRAFFIC |
| 3334 | HORO | HO-RO TRUCKING CO | SCAC1 | ||
| 3335 | HORO | HO-RO TRUCKING CO INC | SCAC4 | ||
| 3336 | HORQ | HORNISH BROS | SCAC1 | ||
| 3337 | HORQ | HORNISH BROS INC | SCAC4 | ||
| 3338 | HORU | HORIZON PETROLEUM AND GAS GROUP LIM | SCAC4 | ||
| 3339 | HORW | HORWITH TRUCKS INC | SCAC4 | ||
| 3340 | HORX | Hodgeson Oil Refining Co. | 7/1935-1/1946 | NAKINA | |
| 3341 | HORX | Hodgeson Oil Refining Co. | Apr-38 | NRHS | |
| 3342 | HORX | HODGESON OIL REFINING CO. | PWRC | ||
| 3343 | HOS | Hoosier Southern R.R. | 7/2000-7/2005; added 7/2008 | NAKINA | |
| 3344 | HOS | Hoosier Southern R.R. | Jul-00 | NRHS | |
| 3345 | HOS | HOOSIER SOUTHERN RAILROAD | PWRC | ||
| 3346 | HOS | Hoosier Southern Railroad | RSRV | ||
| 3347 | HOS | HOOSIER SOUTHERN RAILROAD | SCAC4 | ||
| 3348 | HOS | Hoosier Southern Railroad | USA | TRAFFIC | |
| 3349 | HOSC | Hoosier Connection, The Indiana Eastern R.R. and Transportation, Inc. | eliminated 7/1981; eliminated 1/1985 | NAKINA | |
| 3350 | HOSC | The Hoosier Connection | 1/1980 | NAKINA | |
| 3351 | HOSC | Hoosier Connection, The Indiana Eastern R.R. and Transportation, Inc. | added 7/1979 | NAKINA | |
| 3352 | HOSC | Hoosier Connection, The Indiana Eastern R.R. and Transportation, Inc. | added 7/79 | NRHS | |
| 3353 | HOSC | The Hoosier Connection | Jan-80 | NRHS | |
| 3354 | HOSC | Hoosier Connection, The Indiana Eastern R.R. and Transportation, Inc. | eliminated 7/81; eliminated 1/85 | NRHS | |
| 3355 | HOSC | NORFOLK SOUTHERN [CONRAIL; PENN CENTRAL; PENNSYLVANIA RR; INDIANA & EASTERN RR] | PWRC | ||
| 3356 | HOSC | Indiana and Eastern Railroad: The Hoosier Connection (Norfolk Southern) | RSRV | ||
| 3357 | HOSD | HOLLAND SPECIAL DELIVERY | SCAC4 | ||
| 3358 | HOSI | HILLIS OUTDOOR SPECIALIST INC | SCAC4 | ||
| 3359 | HOSK | HOSKINS, VIC TRUCKING | SCAC4 | ||
| 3360 | HOSM | HARBOR OFFSHORE MARINE INC | SCAC4 | ||
| 3361 | HOSN | HARRISON OILFIELD SERVICES INC | SCAC4 | ||
| 3362 | HOSO | HOUSTON CHEMICAL CO | SCAC4 | ||
| 3363 | HOSP | HEBEI OCEAN SHIPPING CO LTD | SCAC4 | ||
| 3364 | HOSV | HOLTHAUS TRUCK SERVICE INC | SCAC4 | ||
| 3365 | HOTA | H O T SERVICES INC | SCAC4 | ||
| 3366 | HOTB | H O T EXPRESS INC | SCAC4 | ||
| 3367 | HOTD | HORTON, DENNIS TRUCKING | SCAC4 | ||
| 3368 | HOTH | HANDS ON TRANSPORT INC | SCAC4 | ||
| 3369 | HOTL | HIGH OCTANE TRANSPORTATION LLC | SCAC4 | ||
| 3370 | HOTO | H O | SCAC4 | ||
| 3371 | HOTR | HOUFF TRANSFER INC | PWRC | ||
| 3372 | HOTR | HOUFF TRANSFER, INCORPORATED | SCAC1 | ||
| 3373 | HOTR | HOUFF TRANSFER INCORPORATED | SCAC4 | ||
| 3374 | HOTT | HOT-Z TRANSPORT COMPANY | SCAC4 | ||
| 3375 | HOTU | HOYER GLOBAL TRANSPORT BV | SCAC4 | ||
| 3376 | HOTX | Chicago Freight Car Leasing Co. | added 1/1963; 7/1965-1/1980; added 10/1986 | NAKINA | |
| 3377 | HOTX | Chicago Freight Car Leasing Co. | 7/65-1/80; added 10/86 | NRHS | |
| 3378 | HOTX | CHICAGO FREIGHT CAR LEASING CO. | PWRC | ||
| 3379 | HOTX | Chicago Freight Car Leasing | RSRV | ||
| 3380 | HOTY | HOT OIL TRANSPORT LLC | SCAC4 | ||
| 3381 | HOTZ | HOUSE TRACK | PWRC | ||
| 3382 | HOUA | HOUSE, ALLEN TRUCKING | SCAC4 | ||
| 3383 | HOUB | HOUSE, BOB D | SCAC4 | ||
| 3384 | HOUC | HOUG SPECIAL SERVICES INC | SCAC4 | ||
| 3385 | HOUD | HOUDE, WILLIAM LTD | SCAC4 | ||
| 3386 | HOUF | HOUFF TRANSFER INC | PWRC | ||
| 3387 | HOUG | HOUG LLC | SCAC4 | ||
| 3388 | HOUH | HOUGH PETROLEUM CORP | SCAC4 | ||
| 3389 | HOUI | HOTSHOT UNLIMITED | SCAC4 | ||
| 3390 | HOUS | HOUSTON EXPRESS SERVICES | SCAC4 | ||
| 3391 | HOUTRAN | Houston Transit Company | City: Houston | US- | TRAFFIC |
| 3392 | HOUV | HOOVER UNIVERSAL INC | SCAC4 | ||
| 3393 | HOUX | PPG Industries, Inc. | 1/1975-1/1980 | NAKINA | |
| 3394 | HOUX | Houston Chemical Corp. | added 10/1964; eliminated 7/1965; added 4/1966; 10/1966-4/1970; eliminated 4/1971 | NAKINA | |
| 3395 | HOUX | PPG Industries, Inc. | 1/75-1/80 | NRHS | |
| 3396 | HOUX | Houston Chemical Corp. | eliminated 7/65; added 4/66; 10/66-4/70; eliminated 4/71 | NRHS | |
| 3397 | HOUX | PPG INDUSTRIES, INC. [HOUSTON CHEMICAL CORP.] | PWRC | ||
| 3398 | HOVE | HOOVER TRUCKING INCORPORATED | SCAC4 | ||
| 3399 | HOVR | HOOVER ENTERPRISES | SCAC4 | ||
| 3400 | HOVY | HOVEY INDUSTRIES INC | SCAC4 |