| 1 | MSS | Morris Air Service | IATA: KN, Callsign: Wasatch, Founded in 1984. Merged into Southwest Airlines in 1994. | USA | AVCODES |
| 2 | MSS | Global Aviation S.a.r.l. | Callsign: Globe Master, | RIM | AVCODES |
| 3 | MSS | Morris Air Service | | | ICAO1 |
| 4 | MSS | | City: Malmö | S | TRAFFIC |
| 5 | MSSA | METAUX SPECIAUX | | | PWRC |
| 6 | MSSB | MOVING & STORAGE SOLUTIONS INC | | | SCAC4 |
| 7 | MSSC | MAINE SOAPSTONE COMPANY INC | | | SCAC4 |
| 8 | MSSD | MSSE | | | SCAC4 |
| 9 | MSSG | MESSINA SHIPPING CO. LTD. | | | SCAC1 |
| 10 | MSSG | MCCLAIN, S STONE CO INC | | | SCAC4 |
| 11 | MSSH | MADISON SHIPMANAGEMENT SA | | | SCAC4 |
| 12 | MSSK | METRO SHORE SERVICES | | | SCAC4 |
| 13 | MSSL | MADARIS TRANSPORTATION LLC | | | SCAC4 |
| 14 | MSSM | MASSE | | | SCAC4 |
| 15 | MSSP | M & S SHIPPING LIMITED | | | SCAC4 |
| 16 | MSSR | MOSS FARMS TRUCKING INC | | | SCAC4 |
| 17 | MSSS | MASSOLO TRUCKING LLC | | | SCAC4 |
| 18 | MSST | MTB TRUCK & BUS COLLISION | | | SCAC4 |
| 19 | MSSU | MSSA | | F | BIC |
| 20 | MSSU | MSSA SAS | | | SCAC4 |
| 21 | MSSX | MSSA Co. | 7/2005 (not listed) | | NAKINA |
| 22 | MSSX | American Steel & Wire Co. | 7/1937-4/1938 | | NAKINA |
| 23 | MSSX | Minnesota Steel Co. | 8/1920-7/1932 | | NAKINA |
| 24 | MSSX | Minnesota Steel Co. (American Steel & Wire Co.) | 7/1935 | | NAKINA |
| 25 | MSSX | Minnesota Steel Co. (American Steel & Wire Co.) | Apr-38 | | NRHS |
| 26 | MSSX | *AMERICAN STEEL & WIRE CO. [MINNESOTA STEEL CO.] | | | PWRC |
| 27 | MSSX | +MSSA CO. | | | PWRC |
| 28 | MSSX | MSSA COMPANY | | | SCAC4 |
