| 1 | HAM | Haiti Ambassador Airlines | IATA: 2T, Founded in April 2002. Commenced operations in 2003. | RH | AVCODES |
| 2 | HAM | Haiti Ambassador Airlines | IATA: 2T | | ICAO1 |
| 3 | HAM | HIGHWAY AMERICA | | | SCAC4 |
| 4 | HAMA | HAMILTON AIR CONVEYORS CO INC | | | SCAC4 |
| 5 | HAMB | HAM TRUCKING | | | SCAC4 |
| 6 | HAMD | HAMILTON, D., TRUCKING, INC | | | SCAC1 |
| 7 | HAMD | HAMILTON, D, TRUCKING, INC | | | SCAC4 |
| 8 | HAME | HAMME | | | SCAC4 |
| 9 | HAMF | HARBOR AIRLINES MOTOR FREIGHT, Harbor Airlines, INC | | | SCAC1 |
| 10 | HAMG | HAMILTON TRUCKING COMPANY INC | | | SCAC4 |
| 11 | HAMI | HASTINGS MECHANICAL INC | | | SCAC4 |
| 12 | HAML | HAML Corp | City: New Brunswick | US-NJ | TRAFFIC |
| 13 | HAMM | HAMM | | | SCAC4 |
| 14 | HAMO | HAMPSHIRE PAPER CORP | | | SCAC4 |
| 15 | HAMP | HAMPSHI | | | SCAC4 |
| 16 | HAMS | HAMES TRUCKING INC | | | SCAC4 |
| 17 | HAMT | HALLAMORE CORP | | | SCAC4 |
| 18 | HAMU | HAPAG LLOYD A.G | | D | BIC |
| 19 | HAMU | COSTA LINE | | | PWRC |
| 20 | HAMU | Costa Line | | | RSRV |
| 21 | HAMU | CP SHIPS | | | SCAC4 |
| 22 | HAMV | HAMLETT, VAN E | | | SCAC4 |
| 23 | HAMX | North American Car Corp. | added 10/1964; 7/1965-1/1975; eliminated 1/1977 | | NAKINA |
| 24 | HAMX | North American Car Corp. | 7/65-1/75; eliminated 1/77 | | NRHS |
| 25 | HAMX | NORTH AMERICAN CAR CORP. | | | PWRC |
