| 2301 | HILH | HORIZON INT'L SHIPPING INC | | | SCAC4 |
| 2302 | HILI | HI-LINE TRANSFER AND STORAGE INCORP | | | SCAC4 |
| 2303 | HILJ | HILL, JAMES P INC | | | SCAC4 |
| 2304 | HILLSIDE | 22 Hillside | | USA | TRAFFIC |
| 2305 | HILM | HI-LITE MARKINGS INC | | | SCAC4 |
| 2306 | HILN | HORIZON INTERNATIONAL LINES | | | SCAC4 |
| 2307 | HILP | HILLTOP OIL COMPANY INC | | | SCAC4 |
| 2308 | HILS | HILL TRANSPORTATION CO | | | PWRC |
| 2309 | HILU | HILLSTONE HOLDING B.V. | | NL | BIC |
| 2310 | HILV | HILL TRANSPORTATION SERVICE INC | | | SCAC4 |
| 2311 | HILX | Hillman Coal & Coke Co. | 7/1923 | | NAKINA |
| 2312 | HILX | *HILLMAN COAL & COKE CO. | | | PWRC |
| 2313 | HILX | +HILLIARD INVESTMENT, LLC | | | PWRC |
| 2314 | HILX | HILLIARD INVESTMENTS LLC | | | SCAC4 |
| 2315 | HIM | Himalaya Airlines Pvt. Ltd. | IATA: H9, Callsign: Himalaya, IATA Prefix: 769, Established on 20 Aug 2014. Formerly known as Yeti International Pvt. Ltd. Joint venture between HIF Aviation Company Pvt Ltd and Tibet Airlines Ltd. | NEP | AVCODES |
| 2316 | HIMA | HI-MYST | | | SCAC4 |
| 2317 | HIMG | HILL MOVING SERVICES INC | | | SCAC4 |
| 2318 | HIMR | HI-LINE MOVING SERVICES INC | | | SCAC4 |
| 2319 | HIMS | HINDMAN & ISAACS MOVING & STORAGE I | | | SCAC4 |
| 2320 | HIMT | HIMCO TRUCKING SERVICE INC | | | SCAC4 |
| 2321 | HIMU | BASELL POLIOLEFINE ITALIA SRL | | I | BIC |
| 2322 | HIMU | BASELL POLIOLEFINE ITALIA SPA | | | SCAC4 |
| 2323 | HIMX | Heppner Iron & Metal Co. | added 1/1975; 1/1975-1/1980; eliminated 5/1983; eliminated 7/1988 | | NAKINA |
| 2324 | HIMX | Heppner Iron & Metal Co. | added 1/75; 1/75-1/80; eliminated 5/83; eliminated 7/88 | | NRHS |
| 2325 | HIMX | HEPPNER IRON & METAL CO. [HANNIBAL IRON & METAL] | | | PWRC |
| 2326 | HIMX | Heppner Iron and Metal | | | RSRV |
| 2327 | HIMY | HIMILAYA EXPRESS ANTWERPEN BELGIUM | | | SCAC4 |
| 2328 | HIN | Heli Inter Riviera | IATA: EC, Callsign: Heli Inter, Designator EC* recalled by IATA. Name changed from Heli-Inter SA. | F | AVCODES |
| 2329 | HIN | Heli-Inter SA | IATA: EC, Callsign: Heli Inter, Name changed to Heli Inter Riviera | F | AVCODES |
| 2330 | HIN | Holding International Group, S.A. de C.V. | Callsign: Holding Group, | MEX | AVCODES |
| 2331 | HIN | Holding International Group | | | ICAO1 |
| 2332 | HINA | HUNTWOOD INDUSTRIES | | | SCAC4 |
| 2333 | HINB | HCC INC | | | SCAC4 |
| 2334 | HINC | HINDS TRUCKING INC | | | SCAC4 |
| 2335 | HIND | HENSLEY INDUSTRIES INC | | | SCAC4 |
| 2336 | HINF | HAINES, FRED, AND COMPANY, INC | | | SCAC1 |
| 2337 | HINF | HAINES, FRED AND CO | | | SCAC4 |
| 2338 | HINH | HI NEIGHBOR FLOOR COVERING CO | | | SCAC4 |
| 2339 | HINI | HI-NOON PETROLEUM INC | | | SCAC4 |
| 2340 | HINK | HENDERSON INC | | | SCAC4 |
| 2341 | HINL | HAANER INC | | | SCAC4 |
| 2342 | HINM | HULTDINS INC | | | SCAC4 |
| 2343 | HINN | HINSON TRANSPORT SERVICE | | | SCAC4 |
| 2344 | HINO | Hino | | J | TRAFFIC |
| 2345 | HINP | HINRICHSEN EXPRESS INC | | | SCAC4 |
| 2346 | HINQ | HERNKES INC | | | SCAC4 |
| 2347 | HINS | HEALDWORKS INC | | | SCAC4 |
| 2348 | HINV | HOMEDELIVERY | | | SCAC4 |
| 2349 | HINW | HERWOOD INC | | | SCAC4 |
| 2350 | HINX | Heritage Inks International Corp. | eliminated 1/1998; 7/2000-7/2005 (not listed) | | NAKINA |
| 2351 | HINX | Heritage Inks International Corp. | eliminated 1/98; 7/2000 | | NRHS |
| 2352 | HINX | HERITAGE INKS INTERNATIONAL CORP | | | PWRC |
| 2353 | HINX | Heritage Inks International Corporation | | | RSRV |
| 2354 | HINY | HATCHERY INTERNATIONAL | | | SCAC4 |
| 2355 | HIOL | HALL OIL COMPANY INC | | | SCAC4 |
| 2356 | HIOM | HILL, O B TRUCKING & RIGGING CO INC | | | SCAC4 |
| 2357 | HION | HJM INTERNATIONAL OF NY INC | | | SCAC4 |
| 2358 | HIOT | HAWAIIAN OCEAN TRANSPORT INC | | | SCAC4 |
| 2359 | HIP | Starship, S.A. de C.V. | Callsign: Starsa, | MEX | AVCODES |
| 2360 | HIP | Starship | | | ICAO1 |
| 2361 | HIP | HIP-AZOTARA DOO | | RS | VKM |
| 2362 | HIPA | HIGH PLAINS ALPACAS LTD | | | SCAC4 |
| 2363 | HIPL | HI-PLAINS SUNFLOWER CO LLC | | | SCAC4 |
| 2364 | HIPP | HIPP, JOHN C INC | | | SCAC4 |
| 2365 | HIPX | NRG Energy, Inc. | added 10/2006 | | NAKINA |
| 2366 | HIPX | Texas Genco II, LP | added 7/2005; 7/2005; eliminated 10/2006 | | NAKINA |
| 2367 | HIPX | Texas Genco, LP | added 10/2004; eliminated 7/2005 | | NAKINA |
| 2368 | HIPX | Reliant Energy HL&P | added 7/2000; 7/2000; eliminated 10/2004 | | NAKINA |
| 2369 | HIPX | Houston Lighting & Power Co. | eliminated 7/2000 | | NAKINA |
| 2370 | HIPX | Hawkeye Produce Co. | 1/1952; eliminated 1/1953 | | NAKINA |
| 2371 | HIPX | Hawkeye Produce Co. | 1/52; eliminated 1/53 | | NRHS |
| 2372 | HIPX | Houston Lighting & Power Co. | eliminated 7/2000 | | NRHS |
| 2373 | HIPX | Reliant Energy HL&P | added 7/2000; 7/2000 | | NRHS |
| 2374 | HIPX | *HAWKEYE PRODUCE CO. | | | PWRC |
| 2375 | HIPX | +NRG ENERGY [TEXAS GENCO, LP; RELIANT ENERGY HL&P; HOUSTON INDUSTRIES INC - HOUSTON LIGHTING AND POWER CO] | | | PWRC |
| 2376 | HIPX | Reliant Energy HL and P | | | RSRV |
| 2377 | HIPX | NRG ENERGY INC | | | SCAC4 |
| 2378 | HIR | HOLTON INTERURBAN RAILWAY CO. | | | PWRC |
| 2379 | HIRA | HI-REL ALLOYS LTD | | | SCAC4 |
| 2380 | HIRB | HIRD, BILL | | | SCAC4 |
| 2381 | HIRC | HOUSTON INTERMODAL RESOURCES LLC | | | SCAC4 |
| 2382 | HIRI | HIRAI TRUCKING | | | SCAC1 |
| 2383 | HIRM | HIRAM ENTERPRISES INC | | | SCAC4 |
| 2384 | HIRO | HILL-ROM LOGISTICS LLC | | | SCAC4 |
| 2385 | HIRO | | City: Hiroshima | J | TRAFFIC |
| 2386 | HIROD | Hiroshima Electric Railway | | J | TRAFFIC |
| 2387 | HIROS | | City: Hiroshima | J | TRAFFIC |
| 2388 | HIRR | Hainesport Industrial R.R. LLC | added 4/2006 | | NAKINA |
| 2389 | HIRR | HAINESPORT INDUSTRIAL RAILROAD, LLC | | | PWRC |
| 2390 | HIRR | HAINESPORT INDUSTRIAL RAILROAD LLC | | | SCAC4 |
| 2391 | HIRS | HIRSCHBACH MOTOR LINES INC | | | SCAC4 |
| 2392 | HIRT | HIRT, JIM TRUCKING INC | | | SCAC4 |
| 2393 | HIRX | TRANSPORTATION SERVICES AND EQUIPME | | | SCAC4 |
| 2394 | HIS | Hispaniola Airways, C. Por. A. | Callsign: Hispaniola, | DOM | AVCODES |
| 2395 | HIS | Hispaniola Airways, C. Por. A. | IATA: ZS, Callsign: Hispaniola, Designator ZS recalled by IATA. | DOM | AVCODES |
| 2396 | HIS | Hispaniola Airways | | | ICAO1 |
| 2397 | HISE | HILTON-SPENCERPORT EXPRESS, INC | | | SCAC1 |
| 2398 | HISH | HISHON, C I INC | | | SCAC4 |
| 2399 | HISI | HIGH SIERRA EXPRESS-McLAUGHLIN DRAYING COMPANY, INC | | | SCAC1 |
| 2400 | HISI | HERNANDEZ, ISIDRO | | | SCAC4 |
