| 1 | HAG | Hageland Aviation Services, Inc | IATA: H6, Callsign: Hageland, Founed in 1981. Rebranded as Era Alaska in 2009. | USA | AVCODES |
| 2 | HAG | Hageland Aviation Services, Inc | IATA: H6, Callsign: Hageland, Filed for Chapter 11 Bankruptcy, temporarily ceased all operations on 05 April 2020. Founed in 1981. Rebranded as Era Alaska in 2009. | USA | AVCODES |
| 3 | HAG | Hageland Aviation Services | IATA: H6 | | ICAO1 |
| 4 | HAGD | HANSON AGGREGATES NEDERLAND B V | | | SCAC4 |
| 5 | HAGE | Hamburger Eisenbahn e.K | | DE | VKM |
| 6 | HAGEN | Hagener Straßenbahn AG | Real: HST, City: Hagen | D | TRAFFIC |
| 7 | HAGI | HAG LINE | | | SCAC4 |
| 8 | HAGJ | HAGER, JOE TRUCKING INC | | | SCAC4 |
| 9 | HAGO | HAAG OIL COMPANY LLC | | | SCAC4 |
| 10 | HAGQ | HAGEMASTER MOTOR SERVICE, INC | | | SCAC1 |
| 11 | HAGS | HAGAN AND SON TRUCKING INC | | | SCAC4 |
| 12 | HAGU | HERRENKNECHT AG | | D | BIC |
| 13 | HAGX | Hazel-Atlas Glass Co. | 8/1920; 7/1937-1/1941 | | NAKINA |
| 14 | HAGX | Hazel-Atlas Glass Co. | Apr-38 | | NRHS |
| 15 | HAGX | HAZEL-ATLAS GLASS CO. | | | PWRC |
| 16 | HAGY | HAGGERTY LOGISTICS | | | SCAC4 |
