| 1 | NR | Pamir Air | ICAO: PIR, Callsign: Pamir, Designator NR* reinstated by IATA | AFG | AVCODES |
| 2 | NR | RUSS JSC Air Transport Co. | ICAO: RUR, Callsign: Angara, IATA Prefix: 437, | RUS | AVCODES |
| 3 | NR | NorOntair | ICAO: NOT, Callsign: Norontair, | CDN | AVCODES |
| 4 | NR | Executive Aviation Services Limited | ICAO: ESY, Callsign: Exco Air, Designator NR recalled by IATA. | WAN | AVCODES |
| 5 | NR | CSE Aviation Ltd. | ICAO: CSE, Callsign: Wigwam, Desigantor NR recalled by IATA | GB | AVCODES |
| 6 | NR | Max Air Limited | ICAO: NGL, Callsign: Maxair Nigeria, Founded in 2008. Ceased operations | WAN | AVCODES |
| 7 | NR | Al-Naser Airlines | ICAO: MHK, Callsign: Al-Naser, IATA designator changed to NG. Designator 6N recalled by IATA | IRQ | AVCODES |
| 8 | NR | Manta Aviation Pvt. Ltd. | ICAO: MAV, Callsign: Sea Wing, Commenced operations on 24 February 2019. | MV | AVCODES |
| 9 | NR | NEW RIVER RAILWAY CO. | | | PWRC |
| 10 | NR | NetRail AB | 1995 - | S | svenska-lok.se |
| 11 | NR | National Rail Corporation | | AUS | TRAFFIC |
| 12 | NR | NetRail AB | | SE | VKM |
| 13 | NR&PCCCo. | New River & Pocahontas Consolidated Coal Co. (changed to NRBX) | 7/1935 | | NAKINA |
| 14 | NRA | Nitra Air | Callsign: Nitra Air, | SK | AVCODES |
| 15 | NRA | Santi Airlines Limited | Callsign: Santi Airlines, | WAG | AVCODES |
| 16 | NRA | Noar Linhas Aereas | Callsign: Airnoar, Founded in 2009. Commenced operations in 2010. Ceased operations 20 September 2011. | BR | AVCODES |
| 17 | NRAC | NIAGARA RACE CRAFTERS INC | | | SCAC4 |
| 18 | NRAD | NATIONAL ROUTING AND DISTRIBUTION I | | | SCAC4 |
| 19 | NRAF | NORAM FORWARDING INC | | | SCAC3 |
| 20 | NRAIL | Northrail GmbH | | DE | VKM |
| 21 | NRAO | NATIONAL RADIO ASTRONOMY OBSERVATORY | | | PWRC |
| 22 | NRAO | NORTHERN REFRIGERATED TRANSPORTATIO | | | SCAC4 |
| 23 | NRAT | NORTH AMERICAN TRANSPORT COMPANY IN | | | SCAC3 |
| 24 | NRAU | AEROGAS PROCESSORS LIMITED | | TT | BIC |
| 25 | NRAW | NORTHLAND CARRIERS INC | | | SCAC4 |
| 26 | NRAX | Newell Recycling of Atlanta Inc. | 7/2005 (not listed) | | NAKINA |
| 27 | NRAX | NEWELL RECYCLING OF ATLANTA, INC. | | | PWRC |
| 28 | NRAX | NEWELL RECYCLING OF ATLANTA INC | | | SCAC4 |
| 29 | NRBK | NORBROOK INDUSTRIES LTD | | | SCAC4 |
| 30 | NRBN | NORTH-BOUND TRANSPORTATION | | | SCAC3 |
| 31 | NRBO | NOR-BON OIL CO | | | SCAC3 |
| 32 | NRBX | Fruit Growers Express Co. | added 7/1999; 7/2000-7/2005 | | NAKINA |
| 33 | NRBX | Merchants Despatch Transportation Corp. | added 7/1962; 7/1965-1/1994; eliminated 7/1999 | | NAKINA |
| 34 | NRBX | Northern Refrigerator Line, Inc. | added 10/1958; 4/1961; eliminated 7/1962 | | NAKINA |
| 35 | NRBX | New River & Pocahontas Consolidated Coal Co. (previously N.R.&P.C.C.Co.) | added 11/1934; 7/1935-7/1954; eliminated 7/1957 | | NAKINA |
| 36 | NRBX | New River & Pocahontas Consolidated Coal Co. | 4/38-1/52 | | NRHS |
| 37 | NRBX | Northern Refrigerator Line | added 10/58; 4/61 | | NRHS |
| 38 | NRBX | Merchants Despatch Transportation Corp. | 7/65-1/94; eliminated 7/99 | | NRHS |
| 39 | NRBX | Fruit Growers Express Co. | added 7/99; 7/2000 | | NRHS |
| 40 | NRBX | *NEW RIVER & POCAHONTAS CONSOLIDATED COAL CO. [N.R. & P.C.C. CO.] | | | PWRC |
| 41 | NRBX | *(MDTX) MERCHANTS DESPATCH TRANS. CORP. | | | PWRC |
| 42 | NRBX | +FRUIT GROWERS EXPRESS [NORTHERN REFRIGERATOR LINE] | | | PWRC |
| 43 | NRBX | Fruit Growers Express (Merchants Despatch Transportation Corporation) | | | RSRV |
| 44 | NRBX | FRUIT GROWERS EXPRESS COMPANY | | | SCAC4 |
| 45 | NRC | North Sea Airways | Callsign: North Sea, Ceased operations. | NL | AVCODES |
| 46 | NRC | North Sea Airways | | | ICAO1 |
| 47 | NRC | Merchants Despatch Transportation Corp. | added 7/1962; 7/1965-1/1980; eliminated 1/1983 | | NAKINA |
| 48 | NRC | Northern Refrigerator Line, Inc. | 7/1937-4/1961; eliminated 7/1962 | | NAKINA |
| 49 | NRC | Northern Refrigerator Car Co. (Northern Refrigerator Line, Inc.) | 7/1935 | | NAKINA |
| 50 | NRC | Northern Refrigerator Line, Inc. | 4/38-4/61 | | NRHS |
| 51 | NRC | Merchants Despatch Transportation Corp. | 7/65-1/80; eliminated 1/83 | | NRHS |
| 52 | NRC | MERCHANTS DESPATCH TRANS. CORP. [NORTHERN REFRIGERATOR LINE INC] | | | PWRC |
| 53 | NRC | National Refrigerator Car Line (Merchants Despatch Transportation Corporation) | | | RSRV |
| 54 | NRC | Nigerian Railway Corporation | | WAN | TRAFFIC |
| 55 | NRCB | NORTH CARIBBEAN TRANSPORT INC | | | SCAC4 |
| 56 | NRCC | NOR-CAL TRANSPORLTAITON | | | SCAC3 |
| 57 | NRCC | NOLAN TRANSPORT | | | SCAC4 |
| 58 | NRCD | NORTHERN CONSOLIDATORS | | | SCAC3 |
| 59 | NRCD | NORTHEASTERN PAVERS INC | | | SCAC4 |
| 60 | NRCE | NORTH COUNTRY ENTERPRISES LTD | | | SCAC3 |
| 61 | NRCE | NRC ENVIRONMENTAL SERVICES INC | | | SCAC4 |
| 62 | NRCH | NORMAN CHARTER | | | SCAC3 |
| 63 | NRCH | NUR GEMICILIK VE TICARET A S | | | SCAC4 |
| 64 | NRCJ | NR CONSULTANTS | | | SCAC3 |
| 65 | NRCL | NATIONAL RETAIL CONSOLIDATORS | | | SCAC4 |
| 66 | NRCN | NORCON TRANSPORTATION COMPANY INC | | | SCAC3 |
| 67 | NRCN | NOR CAN POST AND POLES SALES LTD | | | SCAC4 |
| 68 | NRCO | NORCO TRANSPORTATION COMPANY INC | | | SCAC3 |
| 69 | NRCO | NORTH COLLINS CYLINDER GAS CO INC | | | SCAC4 |
| 70 | NRCQ | NATIONAL RESEARCH COUNCIL | | | SCAC4 |
| 71 | NRCR | NORTHEASTERN CARRIERS INC | | | SCAC4 |
| 72 | NRCS | NORTH COAST MOVING & STORAGE | | | SCAC3 |
| 73 | NRCT | NORTHERN CARRIERS INC | | | SCAC3 |
| 74 | NRCU | NRS LOGISTICS SHANGHAI CO.LTD | | PRC | BIC |
| 75 | NRCU | NEDLLOYD ROAD CARGO B.V. | | | PWRC |
| 76 | NRCU | Nedlloyd Road Cargo | | | RSRV |
| 77 | NRCX | Northern Rail Car Corp. | added 7/1987; eliminated 7/1991; 1/1994-7/2005 (not listed) | | NAKINA |
| 78 | NRCX | Northern Refrigerator Car Co. (Northern Refrigerator Line, Inc.) | 7/1930-1/1941 | | NAKINA |
| 79 | NRCX | Northern Refrigerator Car Co. | 7/1923 | | NAKINA |
| 80 | NRCX | Northern Rail Car Corp. | added 7/87; eliminated 7/91; 1/94-7/2000 | | NRHS |
| 81 | NRCX | Northern Refrigerator Car Co. (Northern Refrigerator Line, Inc.) | Apr-38 | | NRHS |
| 82 | NRCX | *NORTHERN REFRIGERATOR LINE, INC. [NORTHERN REFRIGERATOR CAR CO.] | | | PWRC |
| 83 | NRCX | +NORTHERN RAIL CAR CORP. | | | PWRC |
| 84 | NRCX | Northern Rail Car Corporation | | | RSRV |
| 85 | NRCX | NORTHERN RAIL CAR CORP. | | | SCAC4 |
| 86 | NRCZ | NORTHERN RAIL CAR | | | PWRC |
| 87 | NRD | Nord Air | Callsign: Nord Air, | RUS | AVCODES |
| 88 | NRD | Nordic NR Regional AB | IATA: 6N, Callsign: Northrider, Name changed to Nordic Airways AB | S | AVCODES |
| 89 | NRD | Nordic Airways AB | IATA: 6N, Callsign: Northrider, Sweden's Transport Authority has revoked the Air Operators licence. Name changed from Nordic NR Regional AB | S | AVCODES |
| 90 | NRD | Nardi S.p.A. | IATA: NE, Callsign: Nardi, | I | AVCODES |
| 91 | NRD | Avia Group Nord LLC | | RUS | AVCODES |
| 92 | NRD | Nordic Regional | IATA: 6N | | ICAO1 |
| 93 | NRDA | NORDIC AIR INC | | | SCAC4 |
| 94 | NRDC | NORDIC MARINE CORP INC. | | | SCAC3 |
| 95 | NRDC | NESTLE R & D CENTER INC | | | SCAC4 |
| 96 | NRDH | NORDAHL TRUCKING INC | | | SCAC3 |
| 97 | NRDJ | NORDSJOFRAKT | | | SCAC3 |
| 98 | NRDL | NORDANA LINES | | | PWRC |
| 99 | NRDM | NORDIC MARITIME SERVICES AS | | | SCAC4 |
| 100 | NRDN | NORDLINE SCHIFFAHRTSGESELLSCHAFT | | | SCAC3 |
