| 1 | NY | Air Iceland (Flugfelag Islands) | ICAO: FNA, IATA Prefix: 882, Name changed from Air Iceland | IS | AVCODES |
| 2 | NY | Flugfelag Islands ehf d/b/a Air Iceland | ICAO: FXI, Callsign: Faxi, IATA Prefix: 882, Name changed to Flugfelag Islands ehf d/b/a Air Iceland Connect. | IS | AVCODES |
| 3 | NY | Air Iceland | ICAO: FNA, IATA Prefix: 882, Name changed to Air Iceland (Flugfelag Islands) | IS | AVCODES |
| 4 | NY | New York Air | ICAO: NYA, | USA | AVCODES |
| 5 | NY | New York Airways, Inc. | ICAO: NYA, Callsign: New York, | USA | AVCODES |
| 6 | NY | Billmans Management Ltd t/a Ansett New Zealand | ICAO: NMA, Callsign: Anza, | NZ | AVCODES |
| 7 | NY | Newmans Airways Limited | ICAO: NMA, Callsign: Newmans, | NZ | AVCODES |
| 8 | NY | Flugfelag Islands ehf d/b/a Air Iceland Connect | ICAO: FXI, Callsign: Faxi, IATA Prefix: 882, Merged into Icelandair w.e.f. 15 March 2021. Name changed from Flugfelag Islands ehf d/b/a Air Iceland. | IS | AVCODES |
| 9 | NYA | Noy Avia | | AM | AVCODES |
| 10 | NYA | New York Air | IATA: NY, | USA | AVCODES |
| 11 | NYA | New York Airways, Inc. | IATA: NY, Callsign: New York, | USA | AVCODES |
| 12 | NYA | Nanyah Aviation Ltd. | Callsign: Nanyah, | IL | AVCODES |
| 13 | NYA | Nanyah Aviation | | | ICAO1 |
| 14 | NYA | New York & Atlantic Ry. Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 15 | NYA | New York & Atlantic Ry. Co. | added 1/98; 7/2000 | | NRHS |
| 16 | NYA | NEW YORK & ATLANTIC RAILWAY | | | PWRC |
| 17 | NYA | New York and Atlantic Railway | | | RSRV |
| 18 | NYA | NEW YORK & ATLANTIC RAILWAY COMPANY | | | SCAC4 |
| 19 | NYA | New York & Atlantic | | USA | TRAFFIC |
| 20 | NYAB | NEW YORK AIRBUS LTD | | | SCAC3 |
| 21 | NYAC | NAVIERA YACU PUMA S A | | | SCAC4 |
| 22 | NYAF | NEYLON AIR SERVICE | | | SCAC3 |
| 23 | NYAF | NEELEY, BILL E TRANSPORTATION INC | | | SCAC4 |
| 24 | NYAR | NYARI TRUCKING INC | | | SCAC3 |
| 25 | NYAS | New York Airport Service | City: New York | US-NY | TRAFFIC |
| 26 | NYAU | N.Y.K. LINE | | | PWRC |
| 27 | NYAU | NYK Line | | | RSRV |
| 28 | NYAX | NEW YORK AIR BRAKE CORP. | | | PWRC |
| 29 | NYB | Force Navale Belge | Callsign: Belgian Navy, | B | AVCODES |
| 30 | NYB | Belgian Navy | | | ICAO1 |
| 31 | NYBD | NEW YORK BANDIT TRUCKING | | | SCAC3 |
| 32 | NYBD | NEW YORK BANDIT TRUCKING LLC | | | SCAC4 |
| 33 | NYBS | New York University | | UA | TRAFFIC |
| 34 | NYBT | NYBERG TRUCKING | | | SCAC3 |
| 35 | NYBT | NAYBACK, DAVID TRUCKING | | | SCAC4 |
| 36 | NYBU | N.Y.K. LINE | | | PWRC |
| 37 | NYBU | NYK Line | | | RSRV |
| 38 | NYC | CSX Transportation | added 7/1999; 7/2000-7/2005 | | NAKINA |
| 39 | NYC | Consolidated Rail Corp. | added 4/1976; 1/1980-1/1994; eliminated 7/1999 | | NAKINA |
| 40 | NYC | Penn Central Transportation Co., Robert W. Blanchette, Richard C. Bond and John H. McArthur, Trustees | eliminated 4/1976 | | NAKINA |
| 41 | NYC | Penn Central Transportation Co. | 1/1975 | | NAKINA |
| 42 | NYC | New York Central R.R. Co. | 8/1920-10/1966 | | NAKINA |
| 43 | NYC | New York Central R.R. Co. | 4/38-10/66 | | NRHS |
| 44 | NYC | Penn Central Transportation Co. | Jan-75 | | NRHS |
| 45 | NYC | Penn Central Transportation Co., Robert W. Blanchette, Richard C. Bond and John H. McArthur, Trustees | eliminated 4/76 | | NRHS |
| 46 | NYC | Consolidated Rail Corp. | added 4/76; 1/80-1/94; eliminated 7/99 | | NRHS |
| 47 | NYC | CSX Transportation | added 7/99; 7/2000 | | NRHS |
| 48 | NYC | CSX TRANSPORTATION [CONSOLIDATED RAIL CORP.; PENN CENTRAL; NEW YORK CENTRAL] | | | PWRC |
| 49 | NYC | New York Central Railroad (CSX Transportation) | | | RSRV |
| 50 | NYC | New York Central | | USA | TRAFFIC |
| 51 | NYCDOC | New York City Department of Corrections | | US-NY | TRAFFIC |
| 52 | NYCE | N Y C EXPRESS | | | SCAC4 |
| 53 | NYCF | NEW YORK CONSOLIDATED FREIGHTWAYS C | | | SCAC3 |
| 54 | NYCFD | New York City Fire Department | | US-NY | TRAFFIC |
| 55 | NYCH | New York Cross Harbor R.R. Terminal Corp. | added 1/1984; 1/1994; eliminated 7/1998; added 7/1998; 7/2000-7/2005 | | NAKINA |
| 56 | NYCH | New York Cross Harbor R.R. Terminal Corp. | 1/94; eliminated 7/98; added 7/98; 7/2000 | | NRHS |
| 57 | NYCH | NEW YORK CROSS HARBOR RAILROAD TERMINAL CORP. | | | PWRC |
| 58 | NYCH | New York Cross Harbor Railroad | | | RSRV |
| 59 | NYCH | NEW YORK CROSS-HARBOR RAILROAD TERM | | | SCAC3 |
| 60 | NYCH | New York Cross Harbor | | USA | TRAFFIC |
| 61 | NYCI | NEW YORK CAROLINA EXPRESS, INC | | | SCAC3 |
| 62 | NYCI | NEW YORK CAROLINA EXPRESS INC | | | SCAC4 |
| 63 | NYCL | NEW YORK COMMERCIAL LUBRICANTS INC | | | SCAC4 |
| 64 | NYCN | New York Connecting R.R. | 1/1975-1/1980 | | NAKINA |
| 65 | NYCN | New York Connecting R.R. | 1/75-1/80 | | NRHS |
| 66 | NYCN | CONSOLIDATED RAIL CORP. [NEW YORK CONNECTING RR.] | | | PWRC |
| 67 | NYCN | New York Connecting Railroad | | | RSRV |
| 68 | NYCN | NEW YORK CONNECTING RAIL ROAD COMPA | | | SCAC3 |
| 69 | NYCP | NYCON FORWARDING CORP | | | SCAC3 |
| 70 | NYCR | NYK CRUISE CO LTD | | | SCAC4 |
| 71 | NYCS | MTA New York City Subway | | USA | TRAFFIC |
| 72 | NYCSO | New York City Sheriff's Office | | US-NY | TRAFFIC |
| 73 | NYCT | N Y C TRANSPORTATION INC | | | SCAC3 |
| 74 | NYCT | N Y C TRANSPORTATION INC | | | SCAC4 |
| 75 | NYCTPD | New York City Transit Police | Merged into NYPD in 1995 | US-NY | TRAFFIC |
| 76 | NYCU | NIYAC CORPORATION | | J | BIC |
| 77 | NYCU | NIYAC CORPORATION | | | SCAC4 |
| 78 | NYCV | NOVELTY COMPANIA NAVIERA SA | | | SCAC3 |
| 79 | NYCX | New York Central Lines LLC | 7/2000-7/2005 (not listed) | | NAKINA |
| 80 | NYCX | New York Central Lines LLC | Jul-00 | | NRHS |
| 81 | NYCX | CSX TRANSPORTATION [CONRAIL; NEW YORK CENTRAL LINES] | | | PWRC |
| 82 | NYCX | New York Central Railroad (CSX Transportation) | | | RSRV |
| 83 | NYCX | NEW YORK CENTRAL LINES LLC | | | SCAC4 |
| 84 | NYCY | NEW YORK CITY TRANSIT AUTHORITY | | | SCAC3 |
| 85 | NYC_ | | City: New York | USA | TRAFFIC |
| 86 | NYD | New York Dock Ry. | 1/1975-1/1980; eliminated 10/1983 | | NAKINA |
| 87 | NYD | New York Dock Ry. | 1/75-1/80; eliminated 10/83 | | NRHS |
| 88 | NYD | NEW YORK DOCK RAILWAY | | | PWRC |
| 89 | NYD | New York Dock Railway | | | RSRV |
| 90 | NYDE | NEW YORK-ONEONTA EXPRESS, INC | | | SCAC3 |
| 91 | NYDM | NYDAM OIL CO INC | | | SCAC4 |
| 92 | NYDT | NEW YORK DEPARTMENT OF TRANSPORTATION | | | PWRC |
| 93 | NYDX | New York Despatch Refrigerator Line (Grand Trunk Western R.R. Co.) | eliminated 7/1957 | | NAKINA |
| 94 | NYDX | New York Despatch Refrigerator Line | 7/1937-7/1954 | | NAKINA |
| 95 | NYDX | New York Despatch Refrigerator Line (Chicago, New York & Boston Refrigerator Co.) | 8/1920-7/1935 | | NAKINA |
| 96 | NYDX | New York Despatch Refrigerator Line (Chicago, New York & Boston Refrigerator Co.) | Apr-38 | | NRHS |
| 97 | NYDX | New York Despatch Refrigerator Line | Jan-52 | | NRHS |
| 98 | NYDX | NEW YORK DESPATCH REFRIGERATOR LINE (GRAND TRUNK WESTERN RAILROAD CO.) | | | PWRC |
| 99 | NYEG | NEW YORK STATE ELECTRIC & GAS | | | PWRC |
| 100 | NYEN | N Y ENTERPRISES | | | SCAC3 |
