| 4801 | HSOD | HELLER & SONS DISTRIBUTING INC | | | SCAC4 |
| 4802 | HSOF | HENGSOFT | | | SCAC4 |
| 4803 | HSOI | HAYS & SON OIL CO INC | | | SCAC4 |
| 4804 | HSOL | H & S OIL COMPANY INC | | | SCAC4 |
| 4805 | HSOR | Hisatsu Orange Railway | | J | TRAFFIC |
| 4806 | HSP | International Jet charter, Inc. d/b/a The Flying Hospital | Callsign: Hospital, | USA | AVCODES |
| 4807 | HSP | | | | ICAO1 |
| 4808 | HSPA | HANSSY SHIPPING PTE LTD | | | SCAC4 |
| 4809 | HSPC | HORNET SHIPPING COMPANY LIMITED | | | SCAC4 |
| 4810 | HSPD | HULSE, PAUL D | | | SCAC4 |
| 4811 | HSPG | HENFORD SHIPPING LTD | | | SCAC4 |
| 4812 | HSPI | HESPERIA TRANSFER & STORAGE CO | | | SCAC4 |
| 4813 | HSPN | HEAT SMART PLUS INC | | | SCAC4 |
| 4814 | HSPO | HESS CORPORATION | | | SCAC4 |
| 4815 | HSPP | HORTON SUPPLY INC | | | SCAC4 |
| 4816 | HSPQ | HILLSIDE PLASTICS INC | | | SCAC4 |
| 4817 | HSPR | HIGH SPEED TRANSPORT | | | SCAC4 |
| 4818 | HSPS | HELLESPONT STEAMSHIP CORPORATION | | | SCAC4 |
| 4819 | HSPT | HOSPITALITY DESIGNS | | | SCAC4 |
| 4820 | HSPW | HERA SHIPPING S R L | | | SCAC4 |
| 4821 | HSR | Citylink Airlines, Inc. | Callsign: Hoosier, | USA | AVCODES |
| 4822 | HSR | Helistar SA | Callsign: Helistar, | GR | AVCODES |
| 4823 | HSR | Citylink Airlines | | | ICAO1 |
| 4824 | HSRA | H & S TRANSPORTATION INC | | | SCAC4 |
| 4825 | HSRC | HANSI'S REFRIGERATED EXPRESS INC | | | SCAC4 |
| 4826 | HSRG | HENSON, ROGER TRUCKING LLC | | | SCAC4 |
| 4827 | HSRN | HOOSIER TRANSIT INC | | | SCAC4 |
| 4828 | HSRO | HASLER OIL COMPANY INC | | | SCAC4 |
| 4829 | HSRR | Hardin Southern R.R., Inc. | 1/1994-7/2005 | | NAKINA |
| 4830 | HSRR | Hardin Southern R.R., Inc. | 1/94-7/2000 | | NRHS |
| 4831 | HSRR | HARDIN SOUTHERN RAILROAD, INC. | | | PWRC |
| 4832 | HSRR | Hardin Southern Railroad | | | RSRV |
| 4833 | HSRR | HARDIN SOUTHERN RAILROAD INC | | | SCAC4 |
| 4834 | HSRR | Hoboken Shore Railroad | | USA | TRAFFIC |
| 4835 | HSRS | HAPPY STANS RECYCLING SERVICES LTD | | | SCAC4 |
| 4836 | HSRT | HESTER, WAYNE TRUCKING INC | | | SCAC4 |
| 4837 | HSRW | Hamilton Street Railway | | CDN | TRAFFIC |
| 4838 | HSRZ | H & S RAILROAD [HARTFORD & SLOCOMB RAILROAD COMPANY, INC.] | | | PWRC |
| 4839 | HSRZ | H and S Railroad | | | RSRV |
| 4840 | HSS | Compania Transportes Aereos Del Sur, S.A. | Callsign: TAS Helicopteros, | E | AVCODES |
| 4841 | HSS | Compania Transportes Aereos Del Sur | | | ICAO1 |
| 4842 | HSS | | | S | TRAFFIC |
| 4843 | HSSC | HELLENIC STAR SHIPPING COMPANY SA | | | SCAC4 |
| 4844 | HSSD | HANDY SHIPPING SRL | | | SCAC4 |
| 4845 | HSSE | HAMEL STEEL SERVICE | | | SCAC4 |
| 4846 | HSSF | HENRY'S SEAFOOD INC | | | SCAC4 |
| 4847 | HSSL | HOME STORAGE SOLUTIONS LLC | | | SCAC4 |
| 4848 | HSSQ | HAAS SAW & SUPPLY | | | SCAC4 |
| 4849 | HSSR | HAY & STRAW SELLER | | | SCAC4 |
| 4850 | HSSS | HOT SHOT SERVICE | | | SCAC4 |
| 4851 | HSSU | HS SHIPPING CO.,LTD | | ROK | BIC |
| 4852 | HSSU | HINDUSTAN SHIPPING S | | | SCAC4 |
| 4853 | HSSV | HOT SHOT SERVICES INC | | | SCAC4 |
| 4854 | HSSW | HASSETT STORAGE WAREHOUSES, INC | | | SCAC1 |
| 4855 | HSSW | HASSETT STORAGE WAREHOUSES INC | | | SCAC4 |
| 4856 | HSSY | HERITAGE SECURITY SERVICES | | | SCAC4 |
| 4857 | HST | Hellenic Star Airways | IATA: HJ, Callsign: Hellenic Star, Ceased opertions in February 2002. | GR | AVCODES |
| 4858 | HST | UAB Heston Airlines JSC | IATA: HN, Callsign: Heston, IATA Prefix code 680 recalled. | LT | AVCODES |
| 4859 | HSTA | HS TOSCA SHIPPING COMPANY LTD | | | SCAC4 |
| 4860 | HSTB | Historische Seethalbahn (instead of entry: VHS) | | CH | VKM |
| 4861 | HSTC | HONE & SON TRUCKING CO | | | SCAC4 |
| 4862 | HSTF | HOUSTON TRANSFER & STORAGE CO | | | SCAC4 |
| 4863 | HSTG | HERNANDEZ & SON TRUCKING | | | SCAC4 |
| 4864 | HSTH | HOIST & HAUL | | | SCAC4 |
| 4865 | HSTI | HELLER & SONS TRANSPORTATION INC | | | SCAC4 |
| 4866 | HSTJ | HANDY, SAM TRUCKING | | | SCAC4 |
| 4867 | HSTP | H & S TRANSPORT | | | SCAC4 |
| 4868 | HSTQ | H.S. TRUCKING | | | SCAC1 |
| 4869 | HSTQ | HORSE SHOE TRANSPORTATION INC | | | SCAC4 |
| 4870 | HSTR | HARRISON - SHIELDS TRANSPORTATION | | | PWRC |
| 4871 | HSTU | MACS MARITIME CARRIER SHIPPING GMBH & CO | | D | BIC |
| 4872 | HSTU | WASHBAY-LINIE GMBH | | | SCAC3 |
| 4873 | HSTV | HOT SHOT THRILL RIDES INC | | | SCAC4 |
| 4874 | HSTW | HESTER, E L TRUCKING INC | | | SCAC4 |
| 4875 | HSTX | Strauss LLC | 7/2005 (not listed) | | NAKINA |
| 4876 | HSTX | Hinckley & Schmitt | 1/1946-4/1961; eliminated 1/1965 | | NAKINA |
| 4877 | HSTX | Hinckley & Schmitt | 1/52-4/61; eliminated 1/65 | | NRHS |
| 4878 | HSTX | *HINKLEY & SCHMITT | | | PWRC |
| 4879 | HSTX | +STRAUS LLC | | | PWRC |
| 4880 | HSTX | STRAUSS LLC | | | SCAC4 |
| 4881 | HSTZ | HERZOG STONE | | | PWRC |
| 4882 | HSU | Helisul | Callsign: Helis, Merged into INAER. | P | AVCODES |
| 4883 | HSU | Helisul | | | ICAO1 |
| 4884 | HSUG | HULL, SCOTT TRUCKING | | | SCAC4 |
| 4885 | HSV | Svenska Direktflyg AB | IATA: HS, Callsign: Highswede, ICAO designator changed from SKH, ICAO callsign changed from Skyreg. Flight also operated by AIS Airlines (IS/PNX). Website shows flight using IATA designator W2 (FlexFlight ApS). Name changed from Skyways Regional AB | S | AVCODES |
| 4886 | HSV | Heliservices (HK) Ltd. | Callsign: Vertiflight, | HK | AVCODES |
| 4887 | HSV | Svenska Direktflyg | | | ICAO1 |
| 4888 | HSV | Hamburger Sportverein | | FAN | TRAFFIC |
| 4889 | HSVC | H.E.S. TRANSPORTATION SERVICES, INC. | | | SCAC1 |
| 4890 | HSVC | H E S TRANSPORTATION SERVICE INC | | | SCAC4 |
| 4891 | HSVI | HTT SERVICE INC | | | SCAC4 |
| 4892 | HSVK | HENDERSCHIE | | | SCAC4 |
| 4893 | HSVL | HARRIS, V L TRUCKING | | | SCAC4 |
| 4894 | HSVN | HOOPER, STEVEN | | | SCAC4 |
| 4895 | HSVT | HUNTER, STEVE, TRUCKING | | | SCAC1 |
| 4896 | HSVT | HILL, STEVEN TRUCKING | | | SCAC4 |
| 4897 | HSVU | CR CONTAINER TRADING GMBH | | D | BIC |
| 4898 | HSW | Aerocombi, S.A. | Callsign: Iberswiss, | E | AVCODES |
| 4899 | HSW | Helena Southwestern R.R. Co. | 1/1975; eliminated 10/1976; added 7/1979; 1/1980; eliminated 1/1989; eliminated 4/1989 | | NAKINA |
| 4900 | HSW | Helena Southwestern R.R. Co. | 1/75; added 7/79; 1/80; eliminated 1/89; eliminated 4/89 | | NRHS |
