| 1 | NEO | Aeronautica del Principado, S.L. | | E | AVCODES |
| 2 | NEO | Northeastern Oklahoma R.R. Co. | 1/1952-10/1966 | | NAKINA |
| 3 | NEO | Northeast Oklahoma R.R. Co. | 1/1941-1/1950 | | NAKINA |
| 4 | NEO | Northeastern Oklahoma R.R. Co. | 1/52-10/66 | | NRHS |
| 5 | NEO | NORTHEAST OKLAHOMA RAILROAD | | | PWRC |
| 6 | NEOC | NEWSOM OIL COMPANY | | | SCAC3 |
| 7 | NEOC | NEW ENGLAND OIL COMPANY INC | | | SCAC4 |
| 8 | NEOD | NEODESHA PLASTICS INC | | | SCAC4 |
| 9 | NEOF | NEW ENGLAND OFFICE CONNECTION INC | | | SCAC3 |
| 10 | NEOI | NEWTON OIL COMPANY INC | | | SCAC4 |
| 11 | NEOM | NEOM MARITIME (SINGAPORE) PTE LTD | | | SCAC4 |
| 12 | NEOMAN | Neoman Bus GmbH | Neoman Bus GmbH, also known as Neoman Bus Group, was a bus, trolleybus and coach manufacturer in Germany, created when MAN Nutzfahrzeuge AG acquired Neoplan Bus GmbH in 2001 | D | TRAFFIC |
| 13 | NEON | Neochim AD / Неохим АД | | BG | VKM |
| 14 | NEOP | NEW ORLEANS PUBLIC SERVICE INC | | | SCAC3 |
| 15 | NEOP | Neoplan | | D | TRAFFIC |
| 16 | NEOPUL | Neopul | | P | TRAFFIC |
| 17 | NEOR | NEW ORLEANS TRUCKING | | | SCAC4 |
| 18 | NEOR | | City: New Orleans | USA | TRAFFIC |
| 19 | NEOS | NEW ENGLAND SHIPPING AGENCIES INC, | | | SCAC3 |
| 20 | NEOT | NELSON, OTTO, AND SONS, INC | | | SCAC3 |
| 21 | NEOT | NELSON, OTTO MOVING AND STORAGE INC | | | SCAC4 |
| 22 | NEOX | New England Oil Refining Co. | 7/1923 | | NAKINA |
| 23 | NEOX | NEW ENGLAND OIL REFINING CO. | | | PWRC |
