| 1 | SOL | Solomon Airlines | IATA: IE, Callsign: Solomon, IATA Prefix: 193, | SOL | AVCODES |
| 2 | SOL | Solomon Airlines | IATA: IE | | ICAO1 |
| 3 | SOL | Stadtwerke Solingen | City: Solingen | D | TRAFFIC |
| 4 | SOLA | SOLANO SANCHEZ, DAVID | | | SCAC4 |
| 5 | SOLA | Solaris | | PL | TRAFFIC |
| 6 | SOLBUS | Solbus | | PL | TRAFFIC |
| 7 | SOLCH | Solvay (Schweiz) AG | | CH | VKM |
| 8 | SOLE | SOUTHLAND EXPRESS LLC | | | SCAC4 |
| 9 | SOLK | SOLTECH GROUP INC | | | SCAC4 |
| 10 | SOLLER | Palma-Sóller | | E | TRAFFIC |
| 11 | SOLM | SEVEN THREE SEVEN ZERO EIGHT THREE | | | SCAC4 |
| 12 | SOLN | SOLAR AMERICA TRANSFERS INC | | | SCAC4 |
| 13 | SOLQ | SOLOMON TRUCKING CO | | | SCAC4 |
| 14 | SOLU | C.T.S SRL | | I | BIC |
| 15 | SOLU | SOLITRANS SPRL | | | SCAC4 |
| 16 | SOLX | Superior Oil Line (Superior Oil Works) | 8/1920-7/1935 | | NAKINA |
| 17 | SOLX | Superior Oil Works, Ltd. (Superior Oil Line) | 7/1937-4/1938 | | NAKINA |
| 18 | SOLX | Superior Oil Works (Superior Oil Line) | 1/1941-1/1943 | | NAKINA |
| 19 | SOLX | H.M. Miller, Owner, Oil Transit Co. | 1/1945-4/1947 | | NAKINA |
| 20 | SOLX | Superior Oil Works | 4/1938 | | NAKINA |
| 21 | SOLX | Solano Rail Car Co. | 1/1975-1/1980 | | NAKINA |
| 22 | SOLX | Solano Rail Car Corp. | added 4/1980; eliminated 7/1989 | | NAKINA |
| 23 | SOLX | Solite Corp. | 7/2000 (not listed) | | NAKINA |
| 24 | SOLX | Standard Oil Co. (Indiana) | Apr-38 | | NRHS |
| 25 | SOLX | Superior Oil Works | Apr-38 | | NRHS |
| 26 | SOLX | Solano Rail Car Co. | 1/75-1/80 | | NRHS |
| 27 | SOLX | Solano Rail Car Corp. | added 4/80; eliminated 7/89 | | NRHS |
| 28 | SOLX | Solite Corp. | Jul-00 | | NRHS |
| 29 | SOLX | *SUPERIOR OIL LINE (H. M. MILLER) | | | PWRC |
| 30 | SOLX | *SOLANO RAIL CAR CO. | | | PWRC |
| 31 | SOLX | *SOLITE CORP. | | | PWRC |
| 32 | SOLX | Solano Rail Car | | | RSRV |
