| 1 | HAT | Air Taxi | Callsign: Taxi Bird, | F | AVCODES |
| 2 | HAT | Air Horizont | IATA: HT, Callsign: Sky Runner, | M | AVCODES |
| 3 | HAT | Air Taxi | | | ICAO1 |
| 4 | HATA | HANSEN AUTO TRANSPORT INC | | | SCAC4 |
| 5 | HATB | HATBORO DELIVERY SERVICE, INC | | | SCAC1 |
| 6 | HATB | HATBORO DELIVERY SERVICE INC | | | SCAC4 |
| 7 | HATI | HA TRANSPORTATION INC | | | SCAC4 |
| 8 | HATJ | H & A TRANSPORTATION LLC | | | SCAC4 |
| 9 | HATK | HALO TRUCKING INC | | | SCAC4 |
| 10 | HATL | HALL'S, L. C | | | SCAC1 |
| 11 | HATL | HALLS, L C TRUCK LINE INC | | | SCAC4 |
| 12 | HATN | HAAS TRUCKING INC | | | SCAC4 |
| 13 | HATO | HARRINGTON TRUCKING, INC | | | SCAC1 |
| 14 | HATO | Hato Bus Co., Ltd | Hato Bus Co., Ltd is a sightseeing bus company in Japan, based in Heiwajima, Ohta-ku, Tokyo. | J | TRAFFIC |
| 15 | HATP | HAUL-AWAY TRANSPORTATION LLC | | | SCAC4 |
| 16 | HATU | HOST RAIL LTD | | RUS | BIC |
| 17 | HATU | H A T ENTERPRISES INC | | | PWRC |
| 18 | HATU | H A T Enterprises | | | RSRV |
| 19 | HATU | HOST RAIL LTD | | | SCAC4 |
| 20 | HATVAN | Hatvani Volán | | H | TRAFFIC |
| 21 | HATW | HERRERA, A TRUCKING | | | SCAC4 |
| 22 | HATX | HELM Financial Corp. | added 1/2001; 7/2005 | | NAKINA |
| 23 | HATX | Helm-Atlantic Associates, L.P. | added 10/1994; 7/2000; eliminated 1/2001 | | NAKINA |
| 24 | HATX | Helm-Atlantic Associates, L.P. | added 10/94; 7/2000; eliminated 1/2001 | | NRHS |
| 25 | HATX | HELM Financial Corp. | added 1/2001 | | NRHS |
| 26 | HATX | HELM-ATLANTIC ASSOCIATES (HELM FINANCIAL CORP.) | | | PWRC |
| 27 | HATX | Helm Financial Corporation | | | RSRV |
| 28 | HATX | HELM FINANCIAL CORPORATION | | | SCAC4 |
| 29 | HATX | Helm Financial Corporation | | USA | TRAFFIC |
| 30 | HATY | HOW ABOUT THAT | | | SCAC4 |
| 31 | HATZ | *H A T ENTERPRISES INC | | | PWRC |
| 32 | HATZ | *HALLETT | | | PWRC |
| 33 | HATZ | H A T Enterprises | | | RSRV |
| 34 | HATZ | H A T ENTERPRISES INC | | | SCAC4 |
