| 1 | NCE | Northcoast Executive Airlines | Callsign: Top Hat, | USA | AVCODES |
| 2 | NCE | Northcoast Executive Airlines | | | ICAO1 |
| 3 | NCEC | NORTHEASTERN COAL AND ENERGY CORPOR | | | SCAC3 |
| 4 | NCEC | NORTHWEST CARRIER EXPRESS LLC | | | SCAC4 |
| 5 | NCEE | NORTH CASCADE EQUIPMENT EXCHANGE IN | | | SCAC3 |
| 6 | NCEI | NATIONAL COMMODITY EXCHANGE INC | | | SCAC3 |
| 7 | NCEK | NACE TRUCKING | | | SCAC3 |
| 8 | NCEL | NORTHERN CENTRAL ENTERPRISES & LEAS | | | SCAC3 |
| 9 | NCEP | NORTH CENTRAL EXPRESS | | | SCAC3 |
| 10 | NCES | NORTH COUNTRY EXPRESS | | | SCAC4 |
| 11 | NCEU | XTRA INTERMODAL | | | PWRC |
| 12 | NCEU | XTRA Intermodal | | | RSRV |
| 13 | NCEX | National Car Systems, Inc. | added 10/2001; eliminated 4/2002; 7/2005 (not listed) | | NAKINA |
| 14 | NCEX | National Castings Division, Midland-Ross Corp. | added 10/1966; 10/1966-4/1970; eliminated 1/1972 | | NAKINA |
| 15 | NCEX | National Castings Division, Midland-Ross Corp. | added 10/66; 10/66-4/70; eliminated 1/72 | | NRHS |
| 16 | NCEX | *NATIONAL CASTINGS DIV., MIDLAND-ROSS CORP. | | | PWRC |
| 17 | NCEX | +NATIONAL CAR SYSTEMS, INC. | | | PWRC |
| 18 | NCEX | National Car Systems | | | RSRV |
| 19 | NCEX | NATIONAL CAR SYSTEMS INC | | | SCAC4 |
| 20 | NCEZ | NEW CO-OP ELEVATOR | | | PWRC |
