| 801 | HCCX | Hercules Cement Co., a Division of American Cement Corp. | added 4/73; 1/75; eliminated 1/78 | | NRHS |
| 802 | HCCX | Hercules Cement Co., An AMCORD Co. | added 1/78; 1/80; eliminated 4/81 | | NRHS |
| 803 | HCCX | Hercules Cement Co. | added 4/81 | | NRHS |
| 804 | HCCX | *HERCULES CEMENT COMPANY | | | PWRC |
| 805 | HCCX | +SOUTHEASTERN INDUSTRIAL ENTERPRISES, INC. | | | PWRC |
| 806 | HCCX | Hercules Cement | | | RSRV |
| 807 | HCCX | SOUTHEASTERN INDUSTRIAL ENTERPRISES | | | SCAC4 |
| 808 | HCCZ | HARRISON CEMENT COMPANY | | | PWRC |
| 809 | HCDD | HUNT, J B TRANSPORT INC | | | SCAC4 |
| 810 | HCDI | HERNANDEZ CAMARENA, DAVID ENRIQUE | | | SCAC4 |
| 811 | HCDK | HICKORY DICKORY DECKS | | | SCAC4 |
| 812 | HCDL | HIGEAR CDL | | | SCAC4 |
| 813 | HCDU | CONTAINERDIENST HAEMMERLE GMBH | | A | BIC |
| 814 | HCDU | ER NAHRUNGSMITTEL GMBH & COMPANY KG. | | | PWRC |
| 815 | HCDU | ER Nahrungsmittel GmBH and KG | | | RSRV |
| 816 | HCDU | CONTAINERDIENST HANS HAEMMERLE | | | SCAC3 |
| 817 | HCDU | CONTAINERDIENST HANS HAEMMERLE GMBH | | | SCAC4 |
| 818 | HCDY | HOSS CARTAGE & DISTRIBUTION | | | SCAC4 |
| 819 | HCEA | HIGH CARGO EXPRESSS LLC | | | SCAC4 |
| 820 | HCEC | HARBOR CHOICE EXPRESS LTD CORP | | | SCAC4 |
| 821 | HCEK | HIGHWAY CARRIER EXPRESS LLC | | | SCAC4 |
| 822 | HCEL | HIGH COUNTRY EXPRESS LLC | | | SCAC4 |
| 823 | HCEP | HIGHBOOST CORP | | | SCAC4 |
| 824 | HCEZ | HAWLEY CI-OP ELEVATOR | | | PWRC |
| 825 | HCF | Helicopterflights Ltd. | Callsign: Eagle, | M | AVCODES |
| 826 | HCFD | HOMEWOOD COL FARMS LTD | | | SCAC4 |
| 827 | HCFK | HORSESHOE CREEK FARMS LTD | | | SCAC4 |
| 828 | HCFM | HILLSBOROUGH COUNTY FLEET MANAGEMEN | | | SCAC4 |
| 829 | HCFN | HAT CREEK FARM INC | | | SCAC4 |
| 830 | HCFR | HILLSIDE CONTEMPORARY FURNISHINGS | | | SCAC4 |
| 831 | HCFT | HIGH COUNTRY FREIGHT LLC | | | SCAC4 |
| 832 | HCFX | H.C. Frick Coke Co. | 8/1920-7/1923 | | NAKINA |
| 833 | HCFX | H. C. FRICK COKE CO. | | | PWRC |
| 834 | HCG | Helicopteros de Guatemala | | GCA | AVCODES |
| 835 | HCGO | HULL COOPERATIVE ASSOCIATION | | | SCAC4 |
| 836 | HCGR | HAMMOND CARGO SERVICES, INC | | | SCAC1 |
| 837 | HCGU | HOUSTON CONTAINER CONNECTION | | USA | BIC |
| 838 | HCGU | Houston Container Connection | | | RSRV |
| 839 | HCGX | North American Salt Co. | added 1/1995; 7/2000-7/2005 | | NAKINA |
| 840 | HCGX | North American Salt Co. | added 1/95; 7/2000 | | NRHS |
| 841 | HCGX | NORTH AMERICAN SALT COMPANY | | | PWRC |
| 842 | HCGX | North American Salt | | | RSRV |
| 843 | HCGX | NORTH AMERICAN SALT | | | SCAC4 |
| 844 | HCH | Hellis Avia Charter | Callsign: Hellisavia, | MD | AVCODES |
| 845 | HCH | Helicopteros del Caribe, C.A. (HELICA) | Callsign: Helica, | YV | AVCODES |
| 846 | HCHK | HAPCHUK INC | | | SCAC4 |
| 847 | HCHS | HIRSCHFELD STEEL CO INC | | | SCAC4 |
| 848 | HCHT | HUACHUCA TRANSFER CO | | | SCAC4 |
| 849 | HCHU | HENGCHENG INTERNATIONAL SUPPLY CHAIN CO., LTD | | PRC | BIC |
| 850 | HCHU | HUNCHUN FANHAI INTERNATIONAL FORWAR | | | SCAC4 |
| 851 | HCHX | Heyden Chemical Corp. | 7/1930-1/1946; 4/1947 (not listed) | | NAKINA |
| 852 | HCHX | Heyden Chemical Corp. | Apr-38 | | NRHS |
| 853 | HCHX | HEYDEN CHEMICAL CORP. | | | PWRC |
| 854 | HCHY | HERNDON, C HAYNE | | | SCAC4 |
| 855 | HCIB | HUDSON CO INC | | | SCAC4 |
| 856 | HCID | HIBBS &CO INC | | | SCAC4 |
| 857 | HCIG | HAMMEL-CALIFORNIA INC | | | SCAC4 |
| 858 | HCIK | HONDURAS CARIBBEAN INC | | | SCAC4 |
| 859 | HCIL | HUB CITY TERMINALS INC | | | SCAC4 |
| 860 | HCIO | HI-LINE COOPERATIVE INC | | | SCAC4 |
| 861 | HCIP | HAGEY COACH INC | | | SCAC4 |
| 862 | HCIS | HAWKES CO INC | | | SCAC4 |
| 863 | HCIU | TEXTAINER EQUIPMENT MANAGEMENT LTD | | BM | BIC |
| 864 | HCIU | STEAM PACKET YARD | | | PWRC |
| 865 | HCIU | Steam Packet Yard | | | RSRV |
| 866 | HCIU | CAPITAL INTERMODAL LIMITED | | | SCAC4 |
| 867 | HCIX | HARCROS CHEMICALS INC | | | SCAC4 |
| 868 | HCJI | HESSE, C J INC | | | SCAC4 |
| 869 | HCK | Heli-Charter Ltd | Callsign: Heli-Charter, | GB | AVCODES |
| 870 | HCKB | HACKMANN BBROTHERS INC | | | SCAC4 |
| 871 | HCKG | HECKMAN TRUCKING INC | | | SCAC4 |
| 872 | HCKL | HICKS OIL CO INC | | | SCAC4 |
| 873 | HCKN | HUB CITY KANSAS CITY, L.P. | | | SCAC1 |
| 874 | HCKN | HUB GROUP INC | | | SCAC4 |
| 875 | HCKP | HICKS-CO INC | | | SCAC4 |
| 876 | HCKQ | HICKMAN MOVING & STORAGE | | | SCAC4 |
| 877 | HCKR | HACKETT TRUCK | | | SCAC4 |
| 878 | HCKS | HICKS TRUCKING COMPANY OF LITCHFIEL | | | SCAC4 |
| 879 | HCL | Helenair Corporation Limited | Callsign: Helencorp, | WL | AVCODES |
| 880 | HCL | Helenair Corporation | | | ICAO1 |
| 881 | HCLB | HIGHTAIL CARRIERS LLC | | | SCAC4 |
| 882 | HCLE | HELVETIA CONTAINER LINE | | | SCAC4 |
| 883 | HCLH | HORIZON COACH LINES LTD | | | SCAC4 |
| 884 | HCLJ | HOMELAND CARRIERS LLC | | | SCAC4 |
| 885 | HCLK | HEDLUND CONTRACTING LTD | | | SCAC4 |
| 886 | HCLL | HANSEATIC CONTAINER LINE LTD | | | SCAC4 |
| 887 | HCLM | HERMANNS CONTRACTING LIMITED | | | SCAC4 |
| 888 | HCLOG | HEICON Service GmbH | | DE | VKM |
| 889 | HCLQ | HIGH CUBE LLC | | | SCAC4 |
| 890 | HCLR | HILLTOP RANCH INC | | | SCAC4 |
| 891 | HCLS | HIDRA CONTROL | | | SCAC4 |
| 892 | HCLT | HORNOI, C L TRUCKING | | | SCAC4 |
| 893 | HCLV | HAVI CONTAINER LINE LIMITED | | | SCAC4 |
| 894 | HCLX | Basell Canada Inc. | added 1/2001; 7/2005; eliminated 1/2009 | | NAKINA |
| 895 | HCLX | Montell Canada Inc. | added 4/1996; 7/2000; eliminated 1/2001 | | NAKINA |
| 896 | HCLX | HIMONT Canada Inc. | added 1/1984; 1/1994; eliminated 4/1996 | | NAKINA |
| 897 | HCLX | Hercules Canada Ltd. | added 4/1979; 1/1980; eliminated 1/1984 | | NAKINA |
| 898 | HCLX | Hercules Canada Ltd. | added 4/79; 1/80 | | NRHS |
| 899 | HCLX | HIMONT Canada Inc. | 1/94; eliminated 4/96 | | NRHS |
| 900 | HCLX | Montell Canada Inc. | added 4/96; 7/2000; eliminated 1/2001 | | NRHS |
