| 1 | SOT | Southeast Correct Craft, Inc. | Callsign: South courier, | USA | AVCODES |
| 2 | SOT | Southeast Correct Craft | | | ICAO1 |
| 3 | SOT | South Omaha Terminal Ry. Co. | 1/1975; eliminated 7/1978 | | NAKINA |
| 4 | SOT | South Omaha Terminal Ry. Co. | 1/75; eliminated 7/78 | | NRHS |
| 5 | SOT | SOUTH OMAHA TERMINAL RAILWAY COMPANY | | | PWRC |
| 6 | SOT | SOUTH OMAHA TERMINAL RAILWAY | | | SCAC4 |
| 7 | SOT | Sagami Railway (Sotetsu) | | J | TRAFFIC |
| 8 | SOTA | SORTINO TRANSPORTATION COMPANY | | | SCAC4 |
| 9 | SOTB | SCENE OF THE CRIME BOOKS | | | SCAC4 |
| 10 | SOTC | STAR ON TIME EXPRESS LLC | | | SCAC4 |
| 11 | SOTD | SCOTT TRANSPORTATION INC | | | SCAC4 |
| 12 | SOTH | SOUTH OTAY TRUCK & HEAVY EQUIPMENT | | | SCAC4 |
| 13 | SOTI | SORTINO TRANSPORTATION INC | | | SCAC4 |
| 14 | SOTJ | SOTA TRANSPORTATION INC | | | SCAC4 |
| 15 | SOTL | SOUTHLINE TRANSPORT, INC | | | SCAC1 |
| 16 | SOTL | SOURCE ONE TRANSPORT LTD | | | SCAC4 |
| 17 | SOTM | SOLO TOOL & MOLD LTD | | | SCAC4 |
| 18 | SOTQ | SIX ONE TWO NINE SIX SIX EIGHT (612 | | | SCAC4 |
| 19 | SOTR | SOUTHERN TRANSPORTATION SERVICES IN | | | SCAC4 |
| 20 | SOTT | SCOTPAT LTD | | | SCAC4 |
| 21 | SOTU | SOLETANCHE BACHY INTERNATIONAL | | F | BIC |
| 22 | SOTX | Stoll Oil Refining Co., Inc. | 8/1920-7/1954; eliminated 4/1956 | | NAKINA |
| 23 | SOTX | Southern Concrete Construction Co., Inc. | added 10/1997; eliminated 1/1998; 7/2000 (not listed) | | NAKINA |
| 24 | SOTX | Stoll Oil Refining Co., Inc. | 4/38-1/52 | | NRHS |
| 25 | SOTX | Southern Concrete Construction Co., Inc. | added 10/97; eliminated 1/98; 7/2000 | | NRHS |
| 26 | SOTX | *STOLL OIL REFINING CO. | | | PWRC |
| 27 | SOTX | *SOUTHERN CONCRETE CONSTRUCTION COMPANY | | | PWRC |
| 28 | SOTX | Southern Concrete Construction | | | RSRV |
