| 1 | HR | Hahn Air Lines | ICAO: HHN, Callsign: Rooster, IATA Prefix: 169, IATA designator changed to HR. Change of name from Hahn Air Businessline | D | AVCODES |
| 2 | HR | Hahn Air Gmbh & Co. Kg. | ICAO: HHN, Callsign: Rooster, IATA Prefix: 169, Change of name to Hahn Air Businessline | D | AVCODES |
| 3 | HR | Air Bremen GmbH & Co. Luftverkehrs KG | ICAO: BRN, Callsign: Air Bremen, | D | AVCODES |
| 4 | HR | Hahn Air Businessline | ICAO: HHN, Callsign: Rooster, IATA Prefix: 169, Change of name from Hahn Air Gmbh & Co. Kg. Name changed to Hahn Air Lines | D | AVCODES |
| 5 | HR | TAR | | RA | AVCODES |
| 6 | HR | Hahn Air Lines | ICAO: HHN, Callsign: Rooster, IATA Prefix: 169, IATA designator changed from HR*. Change of name from Hahn Air Businessline | D | AVCODES |
| 7 | HR | Heritage R.R. Corp. | added 1/2004; eliminated 7/2004; 7/2005 | | NAKINA |
| 8 | HR | HERITAGE RAILROAD CORP. | | | PWRC |
| 9 | HR | HERITAGE RAILROAD CORP | | | SCAC4 |
| 10 | HRA | Heli-Iberica, S.A. | Callsign: Erica, | E | AVCODES |
| 11 | HRA | Heli-Iberica | | | ICAO1 |
| 12 | HRAA | HAYNES TRANSPORT | | | SCAC4 |
| 13 | HRAB | HARMAC REBAR & STEEL CORP | | | SCAC4 |
| 14 | HRAC | HAMILTON, RAY, COMPANY, THE | | | SCAC1 |
| 15 | HRAC | HAMILTON, RAY COMPANY, THE | | | SCAC4 |
| 16 | HRAF | HESTER, R F | | | SCAC4 |
| 17 | HRAI | HIERO, ARTISTICO S A DE C V | | | SCAC4 |
| 18 | HRAIL | Eiffage Rail GmbH | | DE | VKM |
| 19 | HRAJ | HRA | | | SCAC4 |
| 20 | HRAK | HARKER RANCH | | | SCAC4 |
| 21 | HRAN | HARRIS, J A TRUCKING | | | SCAC4 |
| 22 | HRAO | HAMBURG RADIATOR AUTO & AIR | | | SCAC4 |
| 23 | HRAR | HARVIE RANCHING | | | SCAC4 |
| 24 | HRAY | HAND, RAY R | | | SCAC4 |
| 25 | HRB | Haiti International Airline | IATA: HG, Callsign: Haiti Airline, IATA Prefix: 138, | RH | AVCODES |
| 26 | HRB | Haiti International Airline | | | ICAO1 |
| 27 | HRBA | HARBOR AUTO TRANSPORT INC | | | SCAC4 |
| 28 | HRBG | HARDWOOD EXPRESS INC | | | SCAC4 |
| 29 | HRBK | HERRBOLDT TRUCKING | | | SCAC4 |
| 30 | HRBL | H & R BALING COMPANY INC | | | SCAC4 |
| 31 | HRBQ | HARRIS RANCH BEEF COMPANY | | | SCAC4 |
| 32 | HRBR | HARBOR EXPRESS INC | | | SCAC4 |
| 33 | HRBT | HARBOR TRANSPORT INC | | | SCAC4 |
| 34 | HRC | South Atlantic Airways | Callsign: Verdino, ICAO designator changed from CEE | E | AVCODES |
| 35 | HRC | HISTORICAL RAILROAD CARS | | | PWRC |
| 36 | HRCA | HERCORP TRANSPORT INC | | | SCAC4 |
| 37 | HRCB | HAMBURG REEFER CHARTERING GMBH | | | SCAC4 |
| 38 | HRCD | HOT ROD CORNER PARTS AND ACCESSORIE | | | SCAC4 |
| 39 | HRCF | HERCULES FORWARDING, INC | | | SCAC1 |
| 40 | HRCF | HERCULES FORWARDING INC | | | SCAC4 |
| 41 | HRCG | HARDIES FRUIT & VEGETABLE CO INC | | | SCAC4 |
| 42 | HRCH | HAR-G TRANSPORT | | | SCAC4 |
| 43 | HRCK | COOK, H R TRUCK LINE, INC | | | SCAC3 |
| 44 | HRCO | HARCO CARRIERS INC | | | SCAC4 |
| 45 | HRCS | HAMPTON ROADS CRANE & RIGGING COMPA | | | SCAC4 |
| 46 | HRCU | GEFCO FORWARDING (NETHERLANDS) BV | | NL | BIC |
| 47 | HRCU | CUBA RON S A | | | SCAC4 |
| 48 | HRCX | Heritage Railcar | 1/1994-7/2005 (not listed) | | NAKINA |
| 49 | HRCX | Heritage Railcar | 1/94-7/2000 | | NRHS |
| 50 | HRCX | HERITAGE RAILCAR | | | PWRC |
| 51 | HRCX | Heritage Railcar | | | RSRV |
| 52 | HRCX | HERITAGE RAILCAR | | | SCAC4 |
| 53 | HRD | Marshall University Bill Noe Flight School | Callsign: Marshall Herd, | USA | AVCODES |
| 54 | HRDD | HARTS RAPID DELIVERY | | | SCAC4 |
| 55 | HRDE | H R DENTAL PRODUCTS INC | | | SCAC4 |
| 56 | HRDF | HOT ROD TRUCKING SERVICES INC | | | SCAC4 |
| 57 | HRDH | HAMMER, D TRUCKING INC | | | SCAC4 |
| 58 | HRDK | HORD TRUCKING INC | | | SCAC4 |
| 59 | HRDL | Hudson River Day Line | 1/1975-1/1980 | | NAKINA |
| 60 | HRDL | Hudson River Day Line | 1/75-1/80 | | NRHS |
| 61 | HRDL | HUDSON RIVER DAY LINE | | | PWRC |
| 62 | HRDL | Hudson River Day Line | | | RSRV |
| 63 | HRDM | HARDING METALS INC | | | SCAC4 |
| 64 | HRDN | HARDIN TRUCKING INC | | | SCAC4 |
| 65 | HRDR | HARRIS DISTRIBUTING COMPANY | | | SCAC4 |
| 66 | HRDV | HERNANDEZ RIVAS, JULIAN ALONSO | | | SCAC4 |
| 67 | HRDX | Silver Star Enterprises, Inc. | added 1/1994; 7/2000; eliminated 7/2004; 7/2005 (not listed) | | NAKINA |
| 68 | HRDX | M-P Petroleum Ltd. | added 10/1975; eliminated 10/1978 | | NAKINA |
| 69 | HRDX | Hagaman Refining Co. | 8/1920 | | NAKINA |
| 70 | HRDX | Hydrocarbons Inc. | added 10/1974; 1/1975; eliminated 10/1975 | | NAKINA |
| 71 | HRDX | Hydrocarbons Inc. | added 10/74; 1/75 | | NRHS |
| 72 | HRDX | M-P Petroleum Ltd. | eliminated 10/78 | | NRHS |
| 73 | HRDX | Silver Star Enterprises, Inc. | added 1/94; 7/2000 | | NRHS |
| 74 | HRDX | *HAGAMAN REFINING CO. | | | PWRC |
| 75 | HRDX | *M-P PETROLEUM LTD. [HYDROCARBONS, INC.] | | | PWRC |
| 76 | HRDX | +SILVER STAR ENTERPRISES, INC. | | | PWRC |
| 77 | HRDX | Hagaman Refining (Silver Star Enterprises) | | | RSRV |
| 78 | HRE | FFH Sudwestdeutsche Verkehrsfliegerschule | Callsign: Hart Air, | D | AVCODES |
| 79 | HREE | FIVE FIVE SEVEN | | | SCAC4 |
| 80 | HREF | HARE FREIGHT SERVICES INC | | | SCAC4 |
| 81 | HREI | HOUSTON RYDER EXPRESS INC | | | SCAC4 |
| 82 | HREL | HARD ROCK ENTERPRISES LLC | | | SCAC4 |
| 83 | HREM | HOLIDAY RETIREMENT | | | SCAC4 |
| 84 | HREN | HERREN ENTERPRISES INC | | | SCAC4 |
| 85 | HREO | HERRERA, | | | SCAC4 |
| 86 | HREP | HERMITAGE EXPRESS | | | SCAC1 |
| 87 | HREP | HILDABY RIDGE EXPRESS | | | SCAC4 |
| 88 | HRET | HARRIS TRANSPORTATION COMPANY LLC | | | SCAC4 |
| 89 | HREX | Heavy Railroad Excavations, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 90 | HREX | Heavy Railroad Excavations, Inc. | Jul-00 | | NRHS |
| 91 | HREX | HEAVY RAILROAD EXCAVATIONS INC | | | PWRC |
| 92 | HREX | Heavy Railroad Excavations | | | RSRV |
| 93 | HRF | Veterans Airlift Command | Callsign: Hero-Flight, | USA | AVCODES |
| 94 | HRFD | HARRIS FEEDING CO | | | SCAC1 |
| 95 | HRFO | HERFO A/S | | | SCAC4 |
| 96 | HRFX | H.R. Farmer, owner, Farmer Tank Line | 1/1946-4/1947 | | NAKINA |
| 97 | HRFX | H. R. FARMER (FARMER TANK LINES) | | | PWRC |
| 98 | HRGC | HERITAGE ART EDITIONS INC | | | SCAC4 |
| 99 | HRGI | HORNING, ROD TRUCKING INC | | | SCAC4 |
| 100 | HRGK | HARRING, K L TRANSPORTATION LLC | | | SCAC4 |
