| 1 | GZA | Excellent Air GmbH | Callsign: Excellent Air, Founded in 1969 as Frontier Air Service. Ceased operations in 2007. Name changed from Grenzland Air Service and ICAO callsign changed from Grenzland | D | AVCODES |
| 2 | GZA | Grenzland Air Service | Callsign: Grenzland, Name and ICAO callsign changed | D | AVCODES |
| 3 | GZA | Excellent Air | | | ICAO1 |
| 4 | GZAA | GONZALEZ ASTORGA, ALFONSO | | | SCAC4 |
| 5 | GZAI | GOOD ZONE AUTO INC | | | SCAC4 |
| 6 | GZAJ | GARZA AMAYA, JESUS MOISES | | | SCAC4 |
