| 2301 | INQI | INQUIETOS TRUCKING | | | SCAC4 |
| 2302 | INR | Inter Air AB | Callsign: Interair, | S | AVCODES |
| 2303 | INR | INAER Helicopteros, S.A. | IATA: UV, Callsign: Inaer Helicopteros, Name changed to Babcock Mission Critical Services Espa�a. Name changed from Helicopteros del Sureste, S.A. ICAO designator changed from HSE. | E | AVCODES |
| 2304 | INR | Babcock Mission Critical Services España. | IATA: UV, Callsign: Inaer Helicopteros, Name changed from INAER Helicopteros, S.A. Previosly name changed from Helicopteros del Sureste, S.A. ICAO designator changed from HSE. | E | AVCODES |
| 2305 | INR | Babcock Mission Critical Services España. | Callsign: Inaer Helicopteros, IATA Designator UV* recalled. Name changed from INAER Helicopteros, S.A. Previosly name changed from Helicopteros del Sureste, S.A. ICAO designator changed from HSE. | E | AVCODES |
| 2306 | INR | | | IND | TRAFFIC |
| 2307 | INR | INRAIL | | IT | VKM |
| 2308 | INRAIL | INRAIL | | I | TRAFFIC |
| 2309 | INRC | INTERSTAR INC | | | SCAC4 |
| 2310 | INRD | The Indiana Rail Road Co. | added 4/1986; 1/1994; eliminated 7/1999; 7/2000-7/2005; added 1/2007 | | NAKINA |
| 2311 | INRD | The Indiana Rail Road Co. | added 4/86; 1/94; eliminated 7/99; 7/2000 | | NRHS |
| 2312 | INRD | INDIANA RAIL ROAD CO. | | | PWRC |
| 2313 | INRD | Indiana Railroad | | | RSRV |
| 2314 | INRD | The Indiana Rail Road Co. | | USA | TRAFFIC |
| 2315 | INRE | INTROLET LTD | | | SCAC4 |
| 2316 | INRI | INTERNATIONAL DRYER CORP | | | SCAC4 |
| 2317 | INRJ | INTERSAC | | | SCAC4 |
| 2318 | INRK | INTERSTATE TRUCKING INC | | | SCAC4 |
| 2319 | INRL | INTERLAKE AGRI LTD | | | SCAC4 |
| 2320 | INRN | INAS TRANSPORTATION INC | | | SCAC4 |
| 2321 | INRO | I & N TRANSPORTATION INC | | | SCAC4 |
| 2322 | INRS | INTERSTATE TRANSPORT INC | | | SCAC4 |
| 2323 | INRT | INDIAN RIVER TRANSPORT CO | | | SCAC4 |
| 2324 | INRU | LOGITEX INVEST, LLC | | RUS | BIC |
| 2325 | INRW | INARME | | | SCAC4 |
| 2326 | INRX | International Refining Co. | 8/1920-7/1923 | | NAKINA |
| 2327 | INRX | INTERNATIONAL REFINING CO. | | | PWRC |
| 2328 | INS | Inflite The Jet Centre | www.inflite.co.uk | GB | AVCODES |
| 2329 | INS | Instone Airline Ltd. | Callsign: Instone, | GB | AVCODES |
| 2330 | INS | Inflite The Jet Centre | | | ICAO1 |
| 2331 | INS | INLAND STEEL CORP. | | | PWRC |
| 2332 | INSA | INSANA, PETE AUTO & BODY REPAIR & T | | | SCAC4 |
| 2333 | INSA | \"Insa Gas\" OOD | | BG | VKM |
| 2334 | INSB | INDUSTRIAS MELANG SRL DE CV | | | SCAC4 |
| 2335 | INSB | | Real: IVB, City: Innsbruck | A | TRAFFIC |
| 2336 | INSF | IN-SEASON FARMS LTD | | | SCAC4 |
| 2337 | INSH | INLAND SEA INC, THE | | | SCAC4 |
| 2338 | INSI | INSINGER PERFORMANCE INC | | | SCAC4 |
| 2339 | INSK | INTERSTATE TRANSPORT INC | | | SCAC4 |
| 2340 | INSM | INTRANSPORT SERVICES DE MEXICO S DE | | | SCAC4 |
| 2341 | INSO | INTERNATIONAL SOLUTIONS INC | | | SCAC4 |
| 2342 | INSQ | INSTAKILT | | | SCAC4 |
| 2343 | INSR | INSTAR INC | | | SCAC4 |
| 2344 | INST | INTERSTATE CONSOLIDATION, INC. | | | PWRC |
| 2345 | INST | INTERSTATE CONSOLIDATION, INC | | | SCAC1 |
| 2346 | INST | INSTA-INSULATION | | | SCAC4 |
| 2347 | INSU | INSTANTA | | PL | BIC |
| 2348 | INSU | INTERSUB SERVICES | | | PWRC |
| 2349 | INSU | Intersub Services | | | RSRV |
| 2350 | INSU | GENSTAR CONTAINER CORPORATION | | | SCAC4 |
| 2351 | INSX | International Shoe Co. (General American Tank Car Corp.) | 7/1935 | | NAKINA |
| 2352 | INSX | International Shoe Co., Wilkes Tannery | 7/1932 | | NAKINA |
| 2353 | INSX | International Shoe Co., Burke Extract Plant | 7/1923-7/1930 | | NAKINA |
| 2354 | INSX | *INTERNATIONAL SHOE CO. | | | PWRC |
| 2355 | INSX | +INDEPENDENT SALT COMPANY | | | PWRC |
| 2356 | INSX | Independent Salt | | | RSRV |
| 2357 | INSX | INDEPENDENT SALT COMPANY | | | SCAC4 |
| 2358 | INSY | INDALO SHIPPING TRANSPORT & CONSULT | | | SCAC4 |
| 2359 | INT | Intair, Inc. | Callsign: Intairco, | CDN | AVCODES |
| 2360 | INT | Interstate Airlines, Inc. | Callsign: Inter-flight, | USA | AVCODES |
| 2361 | INT | Integra Map & Geoinfomormacion Consulting, S.L. | Callsign: Integra, | E | AVCODES |
| 2362 | INT | Intair | | | ICAO1 |
| 2363 | INT | Norfolk Southern Ry. Co. (Norfolk Southern) | added 1/1991; 1/1994-7/2005 | | NAKINA |
| 2364 | INT | Southern Ry. System | eliminated 1/1991 | | NAKINA |
| 2365 | INT | Interstate R.R. | 8/1920-10/1966 & 1/1975-1/1980 | | NAKINA |
| 2366 | INT | Interstate R.R. | 4/38-10/66 & 1/75-1/80 | | NRHS |
| 2367 | INT | Southern Ry. System | eliminated 1/91 | | NRHS |
| 2368 | INT | Norfolk Southern Ry. Co. | added 1/91; 1/94-7/2000 | | NRHS |
| 2369 | INT | NORFOLK SOUTHERN [SOUTHERN; INTERSTATE RAILROAD] | | | PWRC |
| 2370 | INT | Interstate Railroad (Norfolk Southern) | | | RSRV |
| 2371 | INT | INTERSTATE RAILROAD COMPANY (RAILRO | | | SCAC4 |
| 2372 | INT | Interstate Railroad | | USA | TRAFFIC |
| 2373 | INT | ČSKD - INTRANS a.s. | | CZ | VKM |
| 2374 | INTA | INTRANSIT | | | SCAC4 |
| 2375 | INTB | INTERNATIONAL MOTORCYCLE BROKERS IN | | | SCAC4 |
| 2376 | INTBA | Intertop-Bau GmbH | | DE | VKM |
| 2377 | INTC | INTERTRANS INTERNATIONAL TRANSPORT | | | SCAC4 |
| 2378 | INTD | INTERSTATE DISTRIBUTOR CO | | | SCAC1 |
| 2379 | INTD | INTERSTATE DISTRIBUTOR CO | | | SCAC4 |
| 2380 | INTE | INTERPORT LINES | | | SCAC4 |
| 2381 | INTEG | IntEgro Verkehr GmbH | | DE | VKM |
| 2382 | IntEgro | IntEgro Verkehr GmbH | Reichenbach | D | privat-bahn.de |
| 2383 | INTER | Interkom EOOD | | BG | TRAFFIC |
| 2384 | INTERNATIONAL | TRANSBORDE | | | SCAC4 |
| 2385 | INTF | INTERSTATE FREIGHT LINES INC | | | SCAC4 |
| 2386 | INTH | INTERSTATE LOGISTICS SERVICE INC | | | SCAC4 |
| 2387 | INTHO | INTHO GmbH | | DE | VKM |
| 2388 | INTI | INTERSTATE DISTRIBUTOR CO (INTERMOD | | | SCAC4 |
| 2389 | INTJ | INTERNATIONAL TRANSFER SERVICE INC | | | SCAC4 |
| 2390 | INTL | INNISFAIL TRANSFER LTD | | | SCAC4 |
| 2391 | INTN | INDUSTRIAL TRANSPORTATION INC | | | SCAC4 |
| 2392 | INTO | ITS TECHNOLOGIES & LOGISTICS LLC | | | SCAC4 |
| 2393 | INTR | INTERIOR TRANSPORTATION INC | | | SCAC4 |
| 2394 | INTR | INTERAIL | | AUS | TRAFFIC |
| 2395 | INTRA | Innovatrain AG | | CH | VKM |
| 2396 | INTS | INTERLAKE STEEL | | | PWRC |
| 2397 | INTS | INTERSTATE TRANSIT INC | | | SCAC4 |
| 2398 | INTSK | Slovenska kombinovana doprava INTRANS, a.s. | | SK | VKM |
| 2399 | INTT | INTERSTATE TRANSPORT INC | | | SCAC4 |
| 2400 | INTU | SEACUBE CONTAINERS LLC | | USA | BIC |
