| 4301 | HTCZ | HIBBING TACONITE CO. | PWRC | ||
| 4302 | HTDA | HENDERSON TRUCKING INC | SCAC4 | ||
| 4303 | HTDD | HUNTLEY TRUCKING CO | SCAC4 | ||
| 4304 | HTDF | HARTILL HEAVY HAUL INC | SCAC4 | ||
| 4305 | HTDG | HEADWATERS TRUCKING INC | SCAC4 | ||
| 4306 | HTDI | HAGAN TRANSPORT LLC | SCAC4 | ||
| 4307 | HTDL | H T D TRUCKING | SCAC4 | ||
| 4308 | HTDN | HERNANDEZ TRUCKING | SCAC4 | ||
| 4309 | HTDO | HOFER TRUCKING | SCAC4 | ||
| 4310 | HTDR | HI TECH DESERT EXPRESS INC | SCAC4 | ||
| 4311 | HTDT | HILLSIDE TRANSPORTATION LLC | SCAC4 | ||
| 4312 | HTDV | HARPS, TIMOTHY | SCAC4 | ||
| 4313 | HTDW | HOLDER, TED W TRUCKING | SCAC4 | ||
| 4314 | HTDY | HEAVENBOUND TRANSPORT INC | SCAC4 | ||
| 4315 | HTE | Midwest Helicopters De Mexico | ICAO1 | ||
| 4316 | HTEC | HI-TECH CARGO, INC | SCAC1 | ||
| 4317 | HTEL | HANSERS TRUCKING LLC | SCAC4 | ||
| 4318 | HTEN | HOKER TRUCKING LLC | SCAC4 | ||
| 4319 | HTEO | HEMCHAK TRUCKING LLC | SCAC4 | ||
| 4320 | HTEQ | HYPATIA TRANSPORT | SCAC4 | ||
| 4321 | HTFB | HALLWAY TRANSPORT LLC | SCAC4 | ||
| 4322 | HTFH | HORST TRUCKING | SCAC4 | ||
| 4323 | HTFJ | HILLCORP TRANSPORTATION LLC | SCAC4 | ||
| 4324 | HTFM | HILLTOP FARMS LEASING INC | SCAC4 | ||
| 4325 | HTFO | HERCHE TRANSFER INC | SCAC4 | ||
| 4326 | HTFW | HOLTZMAN TRANSPORT LLC | SCAC4 | ||
| 4327 | HTG | Grossmann Air Service | ICAO1 | ||
| 4328 | HTGC | HALO TRUCKING LLC | SCAC4 | ||
| 4329 | HTGG | HARRIS TRANSPORTATION GROUP LLC | SCAC4 | ||
| 4330 | HTGH | HILLTOP GREENHOUSES LTD | SCAC4 | ||
| 4331 | HTGI | HI TRADING INTERNATIONAL CORP | SCAC4 | ||
| 4332 | HTGM | H T L LOGISTICS INDIA PRIVATE LIMIT | SCAC4 | ||
| 4333 | HTGN | HIGHTOWER OIL CO INC | SCAC4 | ||
| 4334 | HTGO | HERITAGE OPERATING LP | SCAC4 | ||
| 4335 | HTGP | HUTCH TRANSPORTATION GROUP | SCAC4 | ||
| 4336 | HTGQ | HURLEY TRUCKING COMPANY, INC | SCAC1 | ||
| 4337 | HTGQ | HURLEY TRUCKING COMPANY INC | SCAC4 | ||
| 4338 | HTGS | HUNT TUGS & BARGES INC | SCAC4 | ||
| 4339 | HTGW | HERE TODAY GONE TOMORROW INC | SCAC4 | ||
| 4340 | HTGY | HERITAGENERGY | SCAC4 | ||
| 4341 | HTHA | HUGHES TRUCKING INC | SCAC4 | ||
| 4342 | HTHB | HUNTS TRUCKING INC | SCAC4 | ||
| 4343 | HTHC | HATHCO LINES INC | SCAC4 | ||
| 4344 | HTHF | HANCE TRUCKING LLC | SCAC4 | ||
| 4345 | HTHH | HIGHTAIL HOTSHOT | SCAC4 | ||
| 4346 | HTHL | HEATH OIL INC | SCAC4 | ||
| 4347 | HTHM | HP-TECH MOTORSPORT | SCAC4 | ||
| 4348 | HTHO | HEATH LOGISTICS INC | SCAC4 | ||
| 4349 | HTHR | HOLT TOUR & CHARTER | SCAC4 | ||
| 4350 | HTHV | HUWE THE HOUSE MOVER INC | SCAC4 | ||
| 4351 | HTI | Haiti International Air | ICAO1 | ||
| 4352 | HTIC | HOFFMAN TRANSPORTATION INC | SCAC4 | ||
| 4353 | HTIE | HARTKE TRUCKING INC | SCAC4 | ||
| 4354 | HTIF | HOSPITALITY TRANSPORTS INC | SCAC4 | ||
| 4355 | HTIG | HASKINS TRUCKING INC | SCAC4 | ||
| 4356 | HTIH | HOLICK TRANSPORTATION INC | SCAC4 | ||
| 4357 | HTIJ | HART TRANSPORT INC | SCAC4 | ||
| 4358 | HTIL | HEATWAVE TRANSPORT INC | SCAC4 | ||
| 4359 | HTIO | HERITAGE TRUCKING INC | SCAC4 | ||
| 4360 | HTIS | HTI | SCAC4 | ||
| 4361 | HTIT | HTI HYDRAULIC TECHNOLOGIES INC | SCAC4 | ||
| 4362 | HTIU | Hudson Technologies | RSRV | ||
| 4363 | HTIU | HUDSON TECHNOLOGIES INC | SCAC4 | ||
| 4364 | HTIY | HOLY TRANSPORTATION, INC | SCAC4 | ||
| 4365 | HTJ | Høng - Tølløse Jernbane (Tølløsebanen) | 1901 - 2003 | DK | jernbanen.dk |
| 4366 | HTJ | Hörby - Tollarp Järnväg | 1886 - 1898 | S | svenska-lok.se |
| 4367 | HTJ | Høng - Tølløse Jernbane (Tølløsebanen) | 1901 - 2003 | DK | TRAFFIC |
| 4368 | HTJB | HARKINS, T J BASIC COMMODITY BROKER | SCAC4 | ||
| 4369 | HTKA | H TRUCKING INC | SCAC4 | ||
| 4370 | HTKB | HITE TRUCKING LLC | SCAC4 | ||
| 4371 | HTKC | HART TRUCKING CORP | SCAC4 | ||
| 4372 | HTKD | HILLIARD TRUCKING INC | SCAC4 | ||
| 4373 | HTKG | HODGES TRUCKING COMPANY | SCAC4 | ||
| 4374 | HTKH | HUFF TRUCKING LLC | SCAC4 | ||
| 4375 | HTKI | HORNE TRUCKING INC | SCAC4 | ||
| 4376 | HTKJ | HENRYS TRUCKING LLC | SCAC4 | ||
| 4377 | HTKL | HANA TRUCKLINES | SCAC4 | ||
| 4378 | HTKM | HENNIGAR TRUCKING LLC | SCAC4 | ||
| 4379 | HTKO | HOSTETLER TRUCKING | SCAC4 | ||
| 4380 | HTKP | HTL TRUCKING CORP | SCAC4 | ||
| 4381 | HTKQ | HOMBERGER TRUCKING, INC | SCAC1 | ||
| 4382 | HTKR | HANDYTANKERS K/S | SCAC4 | ||
| 4383 | HTKV | HOUSTON TANK SERVICES LLC | SCAC4 | ||
| 4384 | HTKW | HEARN TRUCKING | SCAC4 | ||
| 4385 | HTKY | HOLLIS TRUCKING COMPANY | SCAC4 | ||
| 4386 | HTL | Jet Link Aviation | ICAO1 | ||
| 4387 | HTLC | HOMEFOLK TRANSPORTATION, LLC | SCAC4 | ||
| 4388 | HTLF | HILLMANS TRANSFER LTD | SCAC4 | ||
| 4389 | HTLI | HANNA TRUCK LINE INC | SCAC4 | ||
| 4390 | HTLJ | HTL INC | SCAC4 | ||
| 4391 | HTLN | HOLTON TRUCK LINE | SCAC4 | ||
| 4392 | HTLO | HARTT LOGISTICS | SCAC4 | ||
| 4393 | HTLQ | HTL | SCAC4 | ||
| 4394 | HTLS | HORIZON TANK LINES INC | SCAC4 | ||
| 4395 | HTLX | Haymer Transport Leasing Co. | added 1/1970; 4/1970; eliminated 7/1971 | NAKINA | |
| 4396 | HTLX | Haymer Transport Leasing Co. | added 1/70; 4/70 | NRHS | |
| 4397 | HTLX | HAYMER TRANSPORT LEASING CO. | PWRC | ||
| 4398 | HTLY | HARTLEY TRUCKING COMPANY, INC | SCAC1 | ||
| 4399 | HTMA | HARTMANS TRUCKING COMPANY INC | SCAC4 | ||
| 4400 | HTMC | HESS, T M LLC | SCAC4 |