| 1 | NOR | Norsk Helikopter A/S | Callsign: Norske, Name changed to Bristow Helikopter A/S. | N | AVCODES |
| 2 | NOR | Norving A/S | Callsign: Norving, | N | AVCODES |
| 3 | NOR | Bristow Helikopter A/S | Callsign: Norske, Name changed from Norsk Helikopter A/S. | N | AVCODES |
| 4 | NOR | Norsk Helikopter | | | ICAO1 |
| 5 | NOR | Cincinnati Northern R.R. | 7/1954 | | NAKINA |
| 6 | NOR | Cincinnati Northern R.R. (Cleveland, Cincinnati, Chicago and St. Louis Ry.) | 7/1932-1/1952 | | NAKINA |
| 7 | NOR | The Cincinnati Northern R.R. Co. | 7/1923-7/1930 | | NAKINA |
| 8 | NOR | The Cincinnati Northern R.R. Co. | 23-Jul | | NRHS |
| 9 | NOR | Cincinnati Northern R.R. (Cleveland, Cincinnati, Chicago and St. Louis Ry.) | 4/38-1/52 | | NRHS |
| 10 | NOR | *CLEVELAND, CINCINNATI, CHICAGO & ST. LOUIS RWY. [CINCINNATI NORTHERN RAILROAD CO.] | | | PWRC |
| 11 | NOR | *NORTHWESTERN OKLAHOMA RAILROAD CO. | | | PWRC |
| 12 | NOR | NOR SHEENA LINES | | | SCAC4 |
| 13 | NOR | Norte | | E | TRAFFIC |
| 14 | NORA | Northrail GmbH | | D | TRAFFIC |
| 15 | NORB | NORMAN BROTHERS INC | | | SCAC3 |
| 16 | NORB | Nordbahn Eisenbahngesellschaft | Real: NBE | D | TRAFFIC |
| 17 | NORBV | North Boulevard IBOA | | USA | TRAFFIC |
| 18 | NORC | NORRIS CO | | | SCAC3 |
| 19 | NORC | NordCargo | | I | TRAFFIC |
| 20 | NORCM | NORCEM AS | | NO | VKM |
| 21 | NORD | NORDIC DISTRIBUTING CO | | | SCAC3 |
| 22 | NORD | NORDAN EXPRESS INC | | | SCAC4 |
| 23 | NORD | | | F | TRAFFIC |
| 24 | NORDI | NORDIGAS, a.s. | | CZ | VKM |
| 25 | NORE | NORTHEAST TOWING INC | | | SCAC3 |
| 26 | NORF | NORFOLK TERMINAL CORP | | | SCAC3 |
| 27 | NORH | NORSAR | | | SCAC4 |
| 28 | NORI | NORSTAR INDUSTRIES LTD | | | SCAC4 |
| 29 | NORJ | NORTH JERSEY TANK LINES INC | | | SCAC3 |
| 30 | NORJ | NORDICOM INC | | | SCAC4 |
| 31 | NORK | | City: Norrköping, Veolia is the operator for the tram lines in Norrköping, but the infrastructure and the vehicles are owned by the community. | S | TRAFFIC |
| 32 | NORL | NORTHLAND CORPORATION | | | SCAC3 |
| 33 | NORL | NORTEX LOGISTICS | | | SCAC4 |
| 34 | NORM | Normetal | 1/1975-1/1980 | | NAKINA |
| 35 | NORM | Normetal | 1/75-1/80 | | NRHS |
| 36 | NORM | *NORMETAL | | | PWRC |
| 37 | NORM | *NORTHERN OHIO RAILWAY MUSEUM | | | PWRC |
| 38 | NORM | Normetal | | | RSRV |
| 39 | NORN | NORTHWEST TRANSPORT INC | | | SCAC3 |
| 40 | NORO | NORTH ROAD MOTORS & BODY SHOP | | | SCAC3 |
| 41 | NORO | NORTHERN LOGISTICS INC | | | SCAC4 |
| 42 | NORP | NORTHERN LUMBER TRANSPORT | | | SCAC3 |
| 43 | NORQ | NORUP TRANSPORTATION INC | | | SCAC3 |
| 44 | NORQ | NORTH STAR | | | SCAC4 |
| 45 | NORR | NORRIS, EARL W | | | SCAC3 |
| 46 | NORR | NORGISTICS NORTH AMERICA INC | | | SCAC4 |
| 47 | NORR | Northern Rail Ltd | Northern Rail is a train operating company that has operated local services in the north of England since 2004. The franchise was won by a consortium formed of NedRailways (the English unit of Nederlandse Spoorwegen, the state-owned train operating company of the Netherlands) and Serco, an international operator of public transport systems. This consortium had already won the contract to operate the Merseyrail network earlier in 2003. | GB | TRAFFIC |
| 48 | NORS | NORTHSTAR TRANSPORTATION INC | | | SCAC4 |
| 49 | NORT | NORTHERN TRANSPORT LIMITED | | | SCAC3 |
| 50 | NORT | NORMAND, ALAIN TRANSPORT INC | | | SCAC4 |
| 51 | NORTA | New Orleans Regional Transit Authority | | USA | TRAFFIC |
| 52 | NORTH | Northland Logistics AB | | SE | VKM |
| 53 | NORTRAN | North Suburban Mass Transit District | City: Chicago | USA | TRAFFIC |
| 54 | NORU | NORDBØ HOLDING AS | | N | BIC |
| 55 | NORU | NORASIA LINE | | | SCAC3 |
| 56 | NORU | NORCO, LTD | | | SCAC4 |
| 57 | NORV | NORTHERN ROUTES TRANSPORTATION | | | SCAC3 |
| 58 | NORV | NORTHERN ROUTES TRANSPORTATION | | | SCAC4 |
| 59 | NORW | NORWOOD TRANSPORTATION INC | | | SCAC3 |
| 60 | NORW | NORWOOD TRANSPORTATION INC | | | SCAC4 |
| 61 | NORWALK | Norwalk Transit District | | USA | TRAFFIC |
| 62 | NORX | Northern Indiana Public Service Co. | added 1/1965; 7/1965-7/2005 | | NAKINA |
| 63 | NORX | Normandy Tank Car Co. | 4/1947 | | NAKINA |
| 64 | NORX | Northern Indiana Public Service Co. | added 1/65; 7/65-7/2000 | | NRHS |
| 65 | NORX | *NORMANDY TANK CAR CO. | | | PWRC |
| 66 | NORX | +NORTHERN INDIANA PUBLIC SERVICE CO. | | | PWRC |
| 67 | NORX | Northern Indiana Public Service | | | RSRV |
| 68 | NORX | NORTHERN INDIANA PUBLIC SERVICE CO | | | SCAC3 |
| 69 | NORY | NORTHWOODS TRANSFER | | | SCAC4 |
