| 1 | NDA | Northern Airways | Callsign: Northern Dakota, | USA | AVCODES |
| 2 | NDA | Nordic Aviation Group AS d/b/a Nordica | IATA: ND, Callsign: Nordica Air, All flights operated under LOT Polsih Airlines AOC (LO/LOT) w.e.f. 19 November 2016. Established by Nordic Aviation Group on 25 September 2015 as Nordic Aviation Group. | EST | AVCODES |
| 3 | NDA | Northern Airways | | | ICAO1 |
| 4 | NDAL | NADEAU, ALFRED L | | | SCAC4 |
| 5 | NDAM | NORDIC AMERICAN SHIPPING INC. | | | SCAC3 |
| 6 | NDAM | NORDIC AMERICAN SHIPPING INC. | | | SCAC4 |
| 7 | NDAR | NEED-A-RIDE TRANSPORTATION CO | | | SCAC3 |
| 8 | NDAR | NORTH DAKOTA MUSEUM OF ART | | | SCAC4 |
| 9 | NDAU | INTERNATIONAL NUCLEAR SERVICES LTD | | GB | BIC |
| 10 | NDAU | INTERNATIONAL NUCLEAR SERVICES LTD | | | SCAC4 |
| 11 | NDAX | Ouachita Fertilizer & Grain Co. | added 1/1962; 7/1965; eliminated 10/1965 | | NAKINA |
| 12 | NDAX | Ouachita Fertilizer & Grain Co. | added 1/62; 7/65; eliminated 10/65 | | NRHS |
| 13 | NDAX | OUACHITA FERTILIZER & GRAIN CO. | | | PWRC |
| 14 | NDAY | NEW STANDARD AG INC | | | SCAC4 |
