| 1 | NAA | National Oceanic And Atmospheric Administration | Callsign: Noaa, ICAO designator changed to NOA | USA | AVCODES |
| 2 | NAA | Airmore Aviation | IATA: MO, Callsign: National, | GB | AVCODES |
| 3 | NAA | Norwegian Air Argentina S.A.U. | IATA: DN, Callsign: Noruega, Commenced operations on 16 October 2018. | RA | AVCODES |
| 4 | NAA | National Oceanic and Atmospheric Administration | | | ICAO1 |
| 5 | NAAB | NAAB, STEVE | | | SCAC3 |
| 6 | NAAB | NATIVE DAWN FISHING LTD | | | SCAC4 |
| 7 | NAAD | NEBRASKA ATLANTIC TRANSPORTATION IN | | | SCAC4 |
| 8 | NAAE | NOBODY AUTO TRANSPORT INC | | | SCAC4 |
| 9 | NAAF | NORTH AMERICAN TRANSPORT SERVICES L | | | SCAC4 |
| 10 | NAAF | Namibian Air Force | | NAM | TRAFFIC |
| 11 | NAAG | NORTH AMERICAN AGENCIES OF TEXAS | | | SCAC3 |
| 12 | NAAG | NORTH AMERICAN CARRIERS INC | | | SCAC4 |
| 13 | NAAR | NAVIERAS ARMAS | | | SCAC3 |
| 14 | NAAS | NORTH AMERICAN AUTO LOGISTICS LLC | | | SCAC4 |
| 15 | NAAT | NATIONAL TRANSIT LEASING CORP | | | SCAC3 |
