| 3001 | HLRK | H & L TRUCKING INC | | | SCAC4 |
| 3002 | HLRN | HALO ART INC | | | SCAC4 |
| 3003 | HLRQ | HALRON DISTRIBUTION LLC | | | SCAC4 |
| 3004 | HLRU | HANSA LEASING LTD | | | SCAC4 |
| 3005 | HLRZ | HOLROYD | | | PWRC |
| 3006 | HLS | Haiti Air Freight International SA | | RH | AVCODES |
| 3007 | HLS | Haiti Air Freight | | | ICAO1 |
| 3008 | HLSA | HALL SOLUTIONS | | | SCAC4 |
| 3009 | HLSC | Hampton Ry., Inc. | added 10/1995; 7/2000-7/2005 | | NAKINA |
| 3010 | HLSC | Hampton Ry., Inc. | added 10/95; 7/2000 | | NRHS |
| 3011 | HLSC | HAMPTON LUMBER SALES [HAMPTON RAILWAY INC] | | | PWRC |
| 3012 | HLSC | Hampton Railway | | | RSRV |
| 3013 | HLSC | HAMPTON RAILWAY INC | | | SCAC4 |
| 3014 | HLSD | HILL, SUSAN D | | | SCAC4 |
| 3015 | HLSF | HANSEATIC LLOYD SCHIFFAHRT GMBH & C | | | SCAC4 |
| 3016 | HLSG | HILLIN SAND & GRAVEL INC | | | SCAC4 |
| 3017 | HLSI | HLS | | | SCAC4 |
| 3018 | HLSL | HOLLAND SPECIAL LOGISTICS LLC | | | SCAC4 |
| 3019 | HLSM | HONEY LOCUST FARMS LLC | | | SCAC4 |
| 3020 | HLSN | HALLS INC | | | SCAC4 |
| 3021 | HLSO | HILLSIDE COLONY INC | | | SCAC4 |
| 3022 | HLSP | HALL'S TRANSPORT INC | | | SCAC4 |
| 3023 | HLSS | HOBBY LOBBY STORES INCORPORATED | | | SCAC4 |
| 3024 | HLSU | HLS CONTAINER BREMEN | | D | BIC |
| 3025 | HLSU | HLS CONTAINER BREMEN | | | SCAC4 |
| 3026 | HLSV | HILLSIDE VAN LINES INC | | | SCAC4 |
| 3027 | HLSX | HILLSDALE RAILROAD | | | PWRC |
| 3028 | HLSY | HEMISPHERE LOGISTICS & SUPPLY CHAIN | | | SCAC4 |
| 3029 | HLT | Heli Transport SA | IATA: OI, Callsign: Heli Transport, | F | AVCODES |
| 3030 | HLT | Helitafe | | | ICAO1 |
| 3031 | HLT | Hallandstrafiken AB | | SE | VKM |
| 3032 | HLTA | HOLT OIL COMPANY INC | | | SCAC4 |
| 3033 | HLTC | HI-LITE TRUCK ACCESSORIES LTD | | | SCAC4 |
| 3034 | HLTE | HOTLOAD TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 3035 | HLTF | HAMMER LANE TRUCKING | | | SCAC4 |
| 3036 | HLTG | HARNETT, L T TRUCKING INC | | | SCAC4 |
| 3037 | HLTJ | HLT LIMITED | | | SCAC4 |
| 3038 | HLTK | H & L TRANSPORT | | | SCAC4 |
| 3039 | HLTL | HOLT LOGISTICS CORP | | | SCAC4 |
| 3040 | HLTM | HILTON OIL CO INC | | | SCAC4 |
| 3041 | HLTN | HOLTON TRUCK LINE, INC | | | SCAC1 |
| 3042 | HLTN | HLT SERVICE GROUP INC | | | SCAC4 |
| 3043 | HLTO | HILLTOP TRANSPORTATION | | | SCAC4 |
| 3044 | HLTP | HILLTOP OIL CO | | | SCAC4 |
| 3045 | HLTQ | HOLT, STEVE CONCESSIONS | | | SCAC4 |
| 3046 | HLTR | HOMELAND TRANSPORT INC | | | SCAC4 |
| 3047 | HLTU | TRANS DISTANCE LINE LTD | | HK | BIC |
| 3048 | HLTU | HONG XIN CHONK KONG DEVELOPMENT COM | | | SCAC4 |
| 3049 | HLTV | HILLS TRUCK SERVICE | | | SCAC4 |
| 3050 | HLTW | HIGHER-LEVELZ TRUCKING INC | | | SCAC4 |
| 3051 | HLTX | INEOS Olefins & Polymers USA, a Division of INEOS USA LLC | added 7/2008 | | NAKINA |
| 3052 | HLTX | B P Solvay Polyethylene North America | added 4/2004; 7/2005; eliminated 7/2008 | | NAKINA |
| 3053 | HLTX | BP Amoco Chemical Co. | added 4/2002; eliminated 4/2004 | | NAKINA |
| 3054 | HLTX | *BP SOLVAY POLYETHYLENE NORTH AMERICA {BP AMOCO; AMOCO OIL COMPANY] | | | PWRC |
| 3055 | HLTX | +INEOS OLEFINS & POLYMERS USA, DIV. INEOS USA LLC | | | PWRC |
| 3056 | HLTX | Amoco Oil | | | RSRV |
| 3057 | HLTX | INEOS OLEFINS & POLYMERS USA A DIVI | | | SCAC4 |
| 3058 | HLTY | HALTER, RANDY TRUCKING INC | | | SCAC4 |
| 3059 | HLTZ | HOLLIDAY TYLER | | | PWRC |
| 3060 | HLU | Heli Union Heli Prestations | Callsign: Heli Union, | F | AVCODES |
| 3061 | HLU | Heli Union Heli Prestations | | | ICAO1 |
| 3062 | HLUN | HALL TRUCKING | | | SCAC4 |
| 3063 | HLUS | HAPAG-LLOYD USA LLC | | | SCAC4 |
| 3064 | HLUU | HAESAERTS LUXEMBOURG S.A.R.L. | | L | BIC |
| 3065 | HLV | Heliserv, S.A. de C.V. | Callsign: Heliserv, | MEX | AVCODES |
| 3066 | HLV | Heliservicio, S.A. de C.V. | Callsign: Servi Heli, | MEX | AVCODES |
| 3067 | HLVF | HILLS VAN SERVICE INC (JACKSONVILLE | | | SCAC4 |
| 3068 | HLVS | HALVORSON, RALPH | | | SCAC4 |
| 3069 | HLW | Heliworks Ltda. | Callsign: Heliworks, | RCH | AVCODES |
| 3070 | HLW | Heliworks | | | ICAO1 |
| 3071 | HLWC | HLW INC | | | SCAC4 |
| 3072 | HLWE | HOWARD, LEWIS E TRUCKING INC | | | SCAC4 |
| 3073 | HLWG | HOLLOWAY TRUCKING LLC | | | SCAC4 |
| 3074 | HLWI | HOLWIN TOOLING SYSTEMS INC | | | SCAC4 |
| 3075 | HLX | Hapag-Lloyd Executive GmbH | IATA: 3H, Callsign: Excellence, Designator 3H* recalled by IATA | D | AVCODES |
| 3076 | HLX | Hapag-Lloyd Express GmbH | IATA: X3, Callsign: Excellence, | D | AVCODES |
| 3077 | HLX | INAER Helicopteros | Callsign: Excellence, Designator 3H* recalled by IATA | D | AVCODES |
| 3078 | HLX | Hapag-Lloyd Express GmbH | IATA: X3, Callsign: Yellow Smile, Merged into TUIFly GmbH. | D | AVCODES |
| 3079 | HLX | Hapag-Lloyd Express (TUIfly) | IATA: X3 | | ICAO1 |
| 3080 | HLX | North American Car Corp. | 7/1937-4/1947 | | NAKINA |
| 3081 | HLX | Humane Live Stock Car Co. (North American Car Corp.) | 7/1930-7/1935 | | NAKINA |
| 3082 | HLX | (North American Car Corp.) | Apr-38 | | NRHS |
| 3083 | HLX | NORTH AMERICAN CAR CORP. (HUMANE LIVE STOCK CAR CO.) | | | PWRC |
| 3084 | HLXA | HALL EXPRESS | | | SCAC4 |
| 3085 | HLXC | HELIX COURIER LIMITED | | | SCAC4 |
| 3086 | HLXI | HULL TRANSPORTATION INC | | | SCAC4 |
| 3087 | HLXL | HELIX LOGISTICS LLC | | | SCAC4 |
| 3088 | HLXM | HL TRANSPORTES | | | SCAC4 |
| 3089 | HLXN | HALLS TRANSPORTATION | | | SCAC4 |
| 3090 | HLXO | HALL TRANSPORT | | | SCAC4 |
| 3091 | HLXP | HOTLINE EXPRESS LLC | | | SCAC4 |
| 3092 | HLXS | HELIX SEISMIC EXPLORATION INC | | | SCAC4 |
| 3093 | HLXT | HILLTRUX TANK LINES INC | | | SCAC4 |
| 3094 | HLXU | HAPAG LLOYD A.G | | D | BIC |
| 3095 | HLXU | HAPAG LLOYD A G | | | SCAC4 |
| 3096 | HLY | Heli Air Ltd | Callsign: Whisper, | GB | AVCODES |
| 3097 | HLYS | HOLLYS SUPER GAS | | | SCAC4 |
| 3098 | HLYX | Holly Sugar Corp. | 1/1950-10/1966; eliminated 7/1968 | | NAKINA |
| 3099 | HLYX | Holly Sugar Corp. | 1/52-10/66; eliminated 7/68 | | NRHS |
| 3100 | HLYX | HOLLY SUGAR CORP. | | | PWRC |
