| 4701 | NOWS | NORTH WIND LOGISTICS INC | | | SCAC4 |
| 4702 | NOWU | NORWOOD SHIPPING SA | | E | BIC |
| 4703 | NOWU | NOWSCO | | | SCAC3 |
| 4704 | NOWU | NORWOOD SHIPPING SA | | | SCAC4 |
| 4705 | NOWV | NOW OR NEVER TRUCKING INC | | | SCAC4 |
| 4706 | NOWW | NOW TRUCKING | | | SCAC3 |
| 4707 | NOX | North Express AB | Callsign: North Express, Formerly Fly Logic Malmo AB. | S | AVCODES |
| 4708 | NOX | Cities Service Oil Co. | added 1/1962; eliminated 4/1962 | | NAKINA |
| 4709 | NOX | Arkansas Fuel Oil Corp. | added 10/1958; 4/1961; eliminated 1/1962 | | NAKINA |
| 4710 | NOX | National Oil Co. | 7/1937-10/1957; eliminated 10/1958 | | NAKINA |
| 4711 | NOX | National Oil Co., Inc. | 8/1920-7/1935 | | NAKINA |
| 4712 | NOX | National Oil Co. | 4/38-10/57; eliminated 10/58 | | NRHS |
| 4713 | NOX | Arkansas Fuel Oil Corp. | added 10/58; 4/61; eliminated 1/62 | | NRHS |
| 4714 | NOX | Cities Service Oil Co. | added 1/62; eliminated 4/62 | | NRHS |
| 4715 | NOX | CITIES SERVICE OIL CO. [ARKANSAS FUEL OIL CORP., NATIONAL OIL CO.] | | | PWRC |
| 4716 | NOX | National Oil Co. | | USA | TRAFFIC |
| 4717 | NOXC | NOX-CHEM TRANSPORTATION INC | | | SCAC3 |
| 4718 | NOXL | NETCO TRANSPORT LLC | | | SCAC4 |
| 4719 | NOXN | NINE ONE SIX TWO NINE | | | SCAC4 |
| 4720 | NOXQ | NORTH EXPRESS CO | | | SCAC3 |
| 4721 | NOXU | LEEDEN NATIONAL OXYGEN LTD | | SGP | BIC |
| 4722 | NOY | Noy Aviation | Callsign: Noy Aviation, | IL | AVCODES |
| 4723 | NOY | Noy Aviation | | | ICAO1 |
| 4724 | NOYE | NOYES, DAVID TRUCKING | | | SCAC4 |
| 4725 | NOZ | Norwegian Air Shuttle AOC AS | Callsign: Norseman, ICAO Callsign changed to Nordic. | N | AVCODES |
| 4726 | NOZ | Norwegian Air Shuttle AOC AS | Callsign: Nordic, ICAO Callsign changed from Norseman. | N | AVCODES |
| 4727 | NOZ | Norwegian Air Shuttle | | N | TRAFFIC |
| 4728 | NOZC | NINE ONE ZERO FOUR-FOUR FIVE ONE ON | | | SCAC4 |
| 4729 | NOZD | NINE ONE TWO FIVE-ZERO EIGHT TWO NI | | | SCAC4 |
| 4730 | NOZF | NINE ONE ZERO FIVE-TWO FIVE SIX THR | | | SCAC4 |
| 4731 | NOZI | NINE ONE ZERO SIX-ONE SIX ZERO SIX | | | SCAC4 |
| 4732 | NOZL | NOZOLINO, F, TRUCKING CO | | | SCAC3 |
| 4733 | NOZL | NINE ONE ZERO SEVEN-ONE SEVEN ZERO | | | SCAC4 |
| 4734 | NOZN | NINE ONE ZERO EIGHT NINE SIX ZERO S | | | SCAC4 |
| 4735 | NOZT | NINE ONE ZERO TWO-FIVE SIX SEVEN SI | | | SCAC4 |
| 4736 | NP | Skytrans | Designator NP* recalled by IATA | AUS | AVCODES |
| 4737 | NP | Heavylift Cargo Airlines Ltd. | ICAO: HLA, Callsign: Heavylift, Name changed to HC Airlines Ltd. ICAO callsign changed from November Papa | GB | AVCODES |
| 4738 | NP | Heavylift Cargo Airlines Ltd. | ICAO: HLA, Callsign: November Papa, ICAO callsign changed to Heavylift | GB | AVCODES |
| 4739 | NP | Nile Air | ICAO: NIA, Callsign: Hapi Air, ICAO callsign changed to Nile Bird | ET | AVCODES |
| 4740 | NP | Nile Air | ICAO: NIA, Callsign: Nile Bird, ICAO callsign changed from Hapi Air | ET | AVCODES |
| 4741 | NP | BNSF Ry. Co. | added 4/2005; 7/2005 | | NAKINA |
| 4742 | NP | Burlington Northern Santa Fe Ry. Co. | 7/2000; eliminated 4/2005 | | NAKINA |
| 4743 | NP | Burlington Northern R.R. Co. | added 7/1981; 1/1994 | | NAKINA |
| 4744 | NP | Burlington Northern Inc. | 1/1975-1/1980; eliminated 7/1981 | | NAKINA |
| 4745 | NP | Northern Pacific Ry. Co. | 1/1941-10/1966 | | NAKINA |
| 4746 | NP | Northern Pacific Ry. Co. | 1/52-10/66 | | NRHS |
| 4747 | NP | Burlington Northern Inc. | 1/75-1/80; eliminated 7/81 | | NRHS |
| 4748 | NP | Burlington Northern R.R. Co. | added 7/81; 1/94 | | NRHS |
| 4749 | NP | Burlington Northern Santa Fe Ry. Co. | Jul-00 | | NRHS |
| 4750 | NP | BNSF RWY. [BURLINGTON NORTHERN & SANTA FE; BURLINGTON NORTHERN RR; NORTHERN PACIFIC RY] | | | PWRC |
| 4751 | NP | Northern Pacific Railway (BNSF Railway) | | | RSRV |
| 4752 | NP | Northern Pacific | | USA | TRAFFIC |
| 4753 | NPAD | NPA DE MEXICO SA DE CV | | | SCAC4 |
| 4754 | NPAL | NOPAL CARIBE,DIV.OF NORTHERN PAN-AM LINES,A/S | | | PWRC |
| 4755 | NPAL | NEGRETE PADILLA, ANGELICA LETICIA, | | | SCAC4 |
| 4756 | NPAP | NETWORK PAPER AND PACKAGING LTD | | | SCAC4 |
| 4757 | NPAT | NAPA TRANSPORTATION INC | | | SCAC3 |
| 4758 | NPAT | NAPA TRANSPORTATION INC | | | SCAC4 |
| 4759 | NPB | Norfolk and Portsmouth Belt Line R.R. Co. | 1/1975-7/2005; eliminated 7/2009 | | NAKINA |
| 4760 | NPB | (N&PB) Norfolk and Portsmouth Belt Line R.R. Co. | 4/1970 | | NAKINA |
| 4761 | NPB | (N&PB) Norfolk and Portsmouth Belt Line R.R. Co. | Apr-70 | | NRHS |
| 4762 | NPB | Norfolk and Portsmouth Belt Line R.R. Co. | 1/75-7/2000 | | NRHS |
| 4763 | NPB | NORFOLK & PORTSMOUTH BELT LINE RAILROAD | | | PWRC |
| 4764 | NPB | Norfolk and Portsmouth Belt Line Railroad | | | RSRV |
| 4765 | NPB | NORFOLK & PORTSMOUTH BELT LINE RAIL | | | SCAC4 |
| 4766 | NPBS | NATIONAL PIGGYBACK SERVICES INC | | | SCAC3 |
| 4767 | NPC | Western Air Couriers, Inc. | Callsign: Norpac, | USA | AVCODES |
| 4768 | NPC | Western Air Couriers | | | ICAO1 |
| 4769 | NPCC | NORTHPORT CORPORATION OF ST CLOUD | | | SCAC4 |
| 4770 | NPCF | NORTH PACIFIC COAST FREIGHT BUREAU | | | SCAC3 |
| 4771 | NPCL | NORTH PACIFIC CARRIERS LTD | | | SCAC3 |
| 4772 | NPCN | NEWPORT CONTAINER LINE INC | | | SCAC4 |
| 4773 | NPCO | NORTHEASTERN PRODUCTS CORP | | | SCAC3 |
| 4774 | NPCT | NORTHERN POULTRY COMPANY, THE | | | SCAC4 |
| 4775 | NPCU | NEWPORT TANK CONTAINERS (USA) LLC | | USA | BIC |
| 4776 | NPCU | Newport Tank Containers | | | RSRV |
| 4777 | NPCU | NAVIERA PASCHOLD, S.A. | | | SCAC3 |
| 4778 | NPCU | NEWPORT TANK CONTAINERS INC | | | SCAC4 |
| 4779 | NPCW | NPC | | | SCAC4 |
| 4780 | NPCX | Equistar Chemicals, LP | added 4/1998; 7/2000-7/2005 | | NAKINA |
| 4781 | NPCX | Quantum Chemical Corp., USI Division | added 7/1988; 1/1994; eliminated 4/1998 | | NAKINA |
| 4782 | NPCX | USI Chemicals Co., Division of National Distillers & Chemical Corp. | added 7/1987; eliminated 7/1988 | | NAKINA |
| 4783 | NPCX | U.S. Industrial Chemicals Co., Division of National Distillers and Chemical Corp. | eliminated 7/1987 | | NAKINA |
| 4784 | NPCX | Enron Chemical Co. | added 10/1986; eliminated 4/1987 | | NAKINA |
| 4785 | NPCX | USI Chemicals Co., Inc. | added 4/1987 | | NAKINA |
| 4786 | NPCX | NORCHEM, Inc. | added 1/1986; eliminated 10/1986 | | NAKINA |
| 4787 | NPCX | NORCHEM | added 7/1985; eliminated 1/1986 | | NAKINA |
| 4788 | NPCX | Northern Petrochemical Co. | added 1/1975; 1/1975-1/1980; eliminated 7/1985 | | NAKINA |
| 4789 | NPCX | National Beef Packing Co. | added 10/1968; eliminated 7/1969 | | NAKINA |
| 4790 | NPCX | National Packing Co., Inc. | added 7/1967; eliminated 10/1968 | | NAKINA |
| 4791 | NPCX | National Car Co. | 1/1946-1/1950 | | NAKINA |
| 4792 | NPCX | National Pole Co. | 8/1920-7/1923 | | NAKINA |
| 4793 | NPCX | National Packing Co., Inc. | added 7/67; eliminated 10/68 | | NRHS |
| 4794 | NPCX | National Beef Packing Co. | added 10/68; eliminated 7/69 | | NRHS |
| 4795 | NPCX | Northern Petrochemical Co. | added 1/75; 1/75-1/80 | | NRHS |
| 4796 | NPCX | NORCHEM | eliminated 1/86 | | NRHS |
| 4797 | NPCX | NORCHEM, Inc. | added 1/86; eliminated 10/86 | | NRHS |
| 4798 | NPCX | Enron Chemical Co. | added 10/86; eliminated 4/87 | | NRHS |
| 4799 | NPCX | USI Chemicals Co., Inc. | added 4/87 | | NRHS |
| 4800 | NPCX | U.S. Industrial Chemicals Co., Division of National Distillers and Chemical Corp. | eliminated 7/87 | | NRHS |
