| 1 | HL | Hotels/Motels | ICAO: XHL, Designator HL recalled by IATA. Non-airline Org. in airline industry | USA | AVCODES |
| 2 | HL | Empresa Aeroias Halcon | Callsign: Halcon, | RA | AVCODES |
| 3 | HL | Holiday Express, Deutsche Luftverkehrsges | Callsign: Holiday Express, | D | AVCODES |
| 4 | HL | HAGANS LOGISTIC Sp. z o.o. | | PL | VKM |
| 5 | HLA | HC Airlines Ltd. t/a Heavylift Cargo Airlines | Callsign: Heavylift, Ceased operations on 17 September 2002. Name changed from Heavylift Cargo Airlines Ltd. | GB | AVCODES |
| 6 | HLA | Heavylift Cargo Airlines Ltd. | IATA: NP, Callsign: Heavylift, Name changed to HC Airlines Ltd. ICAO callsign changed from November Papa | GB | AVCODES |
| 7 | HLA | Heavylift Cargo Airlines Ltd. | IATA: NP, Callsign: November Papa, ICAO callsign changed to Heavylift | GB | AVCODES |
| 8 | HLA | Air Hollandia B.V. | Callsign: Hollandia, | NL | AVCODES |
| 9 | HLA | Hellenic Army | Callsign: Hellenic Army, | GR | AVCODES |
| 10 | HLA | HC Airlines | | | ICAO1 |
| 11 | HLA | Hjørring - Løkken - Åbybro | 1913 - 1969 | DK | jernbanen.dk |
| 12 | HLA | Hjørring - Løkken - Åbybro | 1913 - 1969 | DK | TRAFFIC |
| 13 | HLAA | HOLLIS LOGISTICS SERVICES LLC | | | SCAC4 |
| 14 | HLAC | H & L ALUMINUM USA | | | SCAC4 |
| 15 | HLAE | HALL TRUCKING, INC. | | | SCAC1 |
| 16 | HLAE | HL TRUCKING | | | SCAC4 |
| 17 | HLAG | HOLIDAY TRAILS RESORTS INC | | | SCAC4 |
| 18 | HLAM | HARBIN, LARRY MOBILE HOME SERVICE | | | SCAC4 |
| 19 | HLAN | HANLAN TRUCKING | | | SCAC4 |
| 20 | HLAO | HCI LOGISTICS | | | SCAC4 |
| 21 | HLAP | HELLAS TRANSPORT CO | | | SCAC4 |
| 22 | HLAQ | HOVERSON, LOYD A TRUCKING INC | | | SCAC4 |
| 23 | HLAR | HI-LINE TRANSPORTATION INC | | | SCAC4 |
| 24 | HLAS | HOLLAND, SEAN L | | | SCAC4 |
| 25 | HLAT | HALLAND TRANSPORTATION | | | SCAC4 |
| 26 | HLAV | HURRICANE LOGISTICS LLC | | | SCAC4 |
| 27 | HLB | High-Line Airways, Inc. | Callsign: High-Line, | CDN | AVCODES |
| 28 | HLB | High-Line Airways | | | ICAO1 |
| 29 | HLB | Hessische Landesbahn GmbH | Frankfurt (HLB-Gruppe) | D | privat-bahn.de |
| 30 | HLB | HARLOWS BUS SERVICE INC | | | SCAC4 |
| 31 | HLB | Hessische Landesbahn GmbH | | D | TRAFFIC |
| 32 | HLB | HLB Basis AG | | DE | VKM |
| 33 | HLBA | H L B TRANSPORTATION SERVICES | | | SCAC4 |
| 34 | HLBAG | Hansa Luftbild AG | | D | TRAFFIC |
| 35 | HLBC | HOLT TRANSPORT BROKERAGE LLC | | | SCAC4 |
| 36 | HLBI | HORVATS LIVE BAIT INC | | | SCAC4 |
| 37 | HLBL | HILBRANDS, LEE TRUCKING INC | | | SCAC4 |
| 38 | HLBP | HILL BROS PRO-FLEET | | | SCAC4 |
| 39 | HLBQ | H & L BROKERAGE INC | | | SCAC4 |
| 40 | HLBR | HILDEBRAND, WESLEY P | | | SCAC4 |
| 41 | HLBT | HILBURN TRUCKING INC | | | SCAC4 |
| 42 | HLBU | HAPAG LLOYD A.G | | D | BIC |
| 43 | HLBY | HILLBILLY EXPRESS INC | | | SCAC4 |
| 44 | HLBZ | HILL BROTHERS TRANSPORTATION | | | PWRC |
| 45 | HLBZ | Hill Brothers Transportation | | | RSRV |
| 46 | HLBZ | HILL BROTHERS TRANSPORTATION | | | SCAC4 |
| 47 | HLC | Helicap SA | Callsign: Helicap, | F | AVCODES |
| 48 | HLC | Helicap | | | ICAO1 |
| 49 | HLC | HAPAG-LLOYD AG | | | PWRC |
| 50 | HLC | HANAFAN, LILA C | | | SCAC4 |
| 51 | HLCA | HALL, CASEY LEE | | | SCAC4 |
| 52 | HLCB | H & L CHARTER CO INC | | | SCAC4 |
| 53 | HLCD | HALLOCK, C D TRUCKING | | | SCAC4 |
| 54 | HLCF | HEARTLAND CATFISH | | | SCAC4 |
| 55 | HLCG | HARRIS, LEE, TRUCKING CO | | | SCAC1 |
| 56 | HLCG | HARRIS, LEE TRUCKING CO | | | SCAC4 |
| 57 | HLCH | HALL, CHARLES A | | | SCAC4 |
| 58 | HLCI | HIGHLANDER CARRIERS INC | | | SCAC4 |
| 59 | HLCL | HLC CULLIPHER LLC | | | SCAC4 |
| 60 | HLCM | HALL, C M & SONS | | | SCAC4 |
| 61 | HLCN | HELLS CANYON GUIDE SERVICE | | | SCAC4 |
| 62 | HLCO | HAULERS CO INC | | | SCAC4 |
| 63 | HLCP | HELICOPTER FLIGHT SERVICES INC | | | SCAC4 |
| 64 | HLCS | HILLCREST TRANSPORTATION INC | | | SCAC4 |
| 65 | HLCT | HILLCREST TRANSPORT | | | SCAC4 |
| 66 | HLCU | HAPAG LLOYD A.G | | D | BIC |
| 67 | HLCU | HAPAG LLOYD CONTAINER LINE | | | PWRC |
| 68 | HLCU | Hapag-Lloyd | | | RSRV |
| 69 | HLCU | HAPAG-LLOYD A G | | | SCAC1 |
| 70 | HLCU | HAPAG LLOYD A G | | | SCAC4 |
| 71 | HLCV | HARBOUR LINK CONTAINER SERVICES INC | | | SCAC4 |
| 72 | HLCX | Helm Financial Corp. | added 7/1992; 1/1994-7/2005 | | NAKINA |
| 73 | HLCX | Howes Leather Co., Inc. | added 4/1968; eliminated 1/1970 | | NAKINA |
| 74 | HLCX | J.M. Huber Co., Inc. | 7/1937-1/1946 | | NAKINA |
| 75 | HLCX | J.M. Huber Inc. | 7/1935 | | NAKINA |
| 76 | HLCX | J.M. Huber Co. of Louisiana, Inc. | 7/1930-7/1932 | | NAKINA |
| 77 | HLCX | J.M. Huber Inc. | Apr-38 | | NRHS |
| 78 | HLCX | Howes Leather Co., Inc. | added 4/68; eliminated 1/70 | | NRHS |
| 79 | HLCX | Helm Financial Corp. | added 7/92; 1/94-7/2000 | | NRHS |
| 80 | HLCX | *J.M. HUBER CO., INC. | | | PWRC |
| 81 | HLCX | *HOWES LEATHER CO., INC. | | | PWRC |
| 82 | HLCX | +HELM LEASING COMPANY (HELM FINANCIAL CORPORATION) | | | PWRC |
| 83 | HLCX | Helm Leasing | | | RSRV |
| 84 | HLCX | HELM FINANCIAL CORPORATION | | | SCAC4 |
| 85 | HLCX | Helm Financial Corporation | | USA | TRAFFIC |
| 86 | HLCY | HALCYON TRUCKING INC | | | SCAC4 |
| 87 | HLCZ | HARVESTLAND CO-OP | | | PWRC |
| 88 | HLD | Holiday Air | IATA: HW, Callsign: Holiday Express, Ceased operations | TR | AVCODES |
| 89 | HLD | Grampian Flight Centre Ltd. | Callsign: Granite, | GB | AVCODES |
| 90 | HLD | Grampian Flight Centre | | | ICAO1 |
| 91 | HLDA | HIGHLAND TRANSPORTATON GROUP LLC | | | SCAC4 |
| 92 | HLDB | HILDEBRANDT, GEORGE, INC | | | SCAC4 |
| 93 | HLDC | HOLLAND COMPANY INC | | | SCAC4 |
| 94 | HLDD | HOLIDAY TOURS INC | | | SCAC4 |
| 95 | HLDG | HEARTLAND TRUCKING | | | SCAC4 |
| 96 | HLDI | HOLLAND, DONALD TRUCKING INC | | | SCAC4 |
| 97 | HLDL | HEARTLAND TRANSPORT LLC | | | SCAC4 |
| 98 | HLDN | HILDEBRAND, AL TRUCKING LTD | | | SCAC4 |
| 99 | HLDS | HOTLINE DELIVERY SYSTEMS | | | SCAC4 |
| 100 | HLDT | HIGHLAND TRANSPORT INC | | | SCAC4 |
