| 1 | NSR | National Air Charter, PT. | Callsign: Nasair, | RI | AVCODES |
| 2 | NSR | Sun Airlines | Callsign: Sun Airlines, | AM | AVCODES |
| 3 | NSR | Nine Star Airways Co. Ltd. | Callsign: All Star, | T | AVCODES |
| 4 | NSR | National Air Charter | | | ICAO1 |
| 5 | NSR | Newburgh & South Shore R.R. Co. | added 7/1987; 1/1994-7/2005; eliminated 1/2006 | | NAKINA |
| 6 | NSR | Newburgh & South Shore R.R. Co. | added 7/87; 1/94-7/2000 | | NRHS |
| 7 | NSR | NEWBURGH & SOUTH SHORE RAILROAD COMPANY | | | PWRC |
| 8 | NSR | Newburgh and South Shore Railroad | | | RSRV |
| 9 | NSR | NEWBURGH & SOUTH SHORE RAILROAD COM | | | SCAC4 |
| 10 | NSRA | NORTH STAR RANCH INC | | | SCAC4 |
| 11 | NSRC | North Stratford R.R. Corp. | added 7/1979; 1/1980; eliminated 4/1988 | | NAKINA |
| 12 | NSRC | North Stratford R.R. Corp. | added 7/79; 1/80; eliminated 4/88 | | NRHS |
| 13 | NSRC | RETIRED 02-15-90 FET [NORTH STRATFORD RR] | | | PWRC |
| 14 | NSRC | North Stratford Railroad | | | RSRV |
| 15 | NSRC | NEW SERVICE TRANSPORT INC | | | SCAC4 |
| 16 | NSRF | NYNAS SUPPLY & REFINING AB | | | SCAC3 |
| 17 | NSRF | NORTH STAR TRANSFER | | | SCAC4 |
| 18 | NSRG | NORTHWEST SIGN RECYCLING | | | SCAC4 |
| 19 | NSRI | NORTHSTAR INTERNATIONAL | | | SCAC3 |
| 20 | NSRK | N & S TRUCKING | | | SCAC3 |
| 21 | NSRM | NEVADA STATE RAILROAD MUSEUM | | | PWRC |
| 22 | NSRP | NORTHSTAR TRANSPORT INC | | | SCAC3 |
| 23 | NSRP | NORTH STAR PIPE & TANK CO | | | SCAC4 |
| 24 | NSRQ | NORTH SHORE RECYCLED FIBERS CORP | | | SCAC3 |
| 25 | NSRR | NORFOLK SOUTHERN RAILWAY | | | SCAC4 |
| 26 | NSRU | NAM SUNG SHIPPING CO LTD | | ROK | BIC |
| 27 | NSRU | NAM SUNG SHIPPING CO LTD | | | SCAC4 |
| 28 | NSRX | National Sugar Refining Co. | added 7/1953; 7/1954-1/1980; eliminated 10/1982 | | NAKINA |
| 29 | NSRX | National Sugar Refining Co. | 10/57-1/80; eliminated 10/82 | | NRHS |
| 30 | NSRX | *JACK FROST CANE SUGAR {NATIONAL SUGAR REFINING CO.] | | | PWRC |
| 31 | NSRX | *NORTH STAR RAIL | | | PWRC |
| 32 | NSRX | Jack Frost Cane Sugar | | | RSRV |
| 33 | NSRX | FRIENDS OF THE 261 | | | SCAC4 |
