| 1501 | SCHEU | Scheuchzer S.A. | | CH | TRAFFIC |
| 1502 | SCHEU | Scheuchzer SA | | CH | VKM |
| 1503 | SCHF | SCHEFFLER, J. L | | | SCAC1 |
| 1504 | SCHF | SCHEFFLER, J L, TRANSPORT, INC | | | SCAC4 |
| 1505 | SCHG | SCHAGRIN GAS COMPANY | | | SCAC4 |
| 1506 | SCHH | SCHOEN, ERICH TRUCKING | | | SCAC4 |
| 1507 | SCHI | SCHNITZER INDUSTRIES | | | PWRC |
| 1508 | SCHJ | SCHUMACHER, ALLEN TRUCKING | | | SCAC4 |
| 1509 | SCHK | SCHIEK MOTOR EXPRESS, INC | | | SCAC1 |
| 1510 | SCHK | SCHIEK MOTOR EXPRESS, INC | | | SCAC4 |
| 1511 | SCHL | SCHROER CORP | | | SCAC4 |
| 1512 | SCHM | SINOCHEM SHIPPING CO LTD (HAINAN) | | | SCAC4 |
| 1513 | SCHMET | Schmetterling Reise- und Verkehrs-Logistik GmbH | | D | TRAFFIC |
| 1514 | SCHMIDTW | Reisebüro Schmidt GmbH | City: Wolfenbüttel | D | TRAFFIC |
| 1515 | SCHO | SCHAU, H C & SON INC | | | SCAC4 |
| 1516 | SCHON | | City: Schöneiche | D | TRAFFIC |
| 1517 | SCHP | SCHIBI TRANSPORTATION LLC | | | SCAC4 |
| 1518 | SCHR | SCHOTT TRANSPORTATION INC | | | SCAC4 |
| 1519 | SCHS | SCHULTZS MOVING SERVICE | | | SCAC4 |
| 1520 | SCHU | SYNTHESIS CHIMICA S.R.L. | | I | BIC |
| 1521 | SCHU | SYNTHESIS CHIMICA S R L | | | SCAC4 |
| 1522 | SCHUY | Schuylkill Valley Lines | | US-PA | TRAFFIC |
| 1523 | SCHV | SCHOONOVER OIL CO INC | | | SCAC4 |
| 1524 | SCHW | Schweerbau | | D | TRAFFIC |
| 1525 | SCHW | Franz Schwalbe KG (Gleis und Tiefbau -Unternehmen) | | DE | VKM |
| 1526 | SCHX | Stauffer Chemical Co., Inc. (Eastern Branch) | 7/1930-7/1954; eliminated 7/1956 | | NAKINA |
| 1527 | SCHX | Stauffer Chemical Co. (Eastern Branch) | added 7/1956; 10/1957-1/1980 | | NAKINA |
| 1528 | SCHX | Stauffer Chemical Co. | eliminated 4/1990 | | NAKINA |
| 1529 | SCHX | Rhone-Poulenc Basic Chemicals Co. | added 4/1990; 1/1994; eliminated 10/1999 | | NAKINA |
| 1530 | SCHX | Rhodia, Inc. | added 10/1999; 7/2000; eliminated 4/2004; added 1/2005; 7/2005; eliminated 4/2006 | | NAKINA |
| 1531 | SCHX | Innophos, Inc. | added 4/2006; eliminated 4/2008 | | NAKINA |
| 1532 | SCHX | Stauffer Chemical Co., Inc. (Eastern Branch) | 4/38-1/52; eliminated 7/56 | | NRHS |
| 1533 | SCHX | Stauffer Chemical Co. (Eastern Branch) | added 7/56; 10/57-1/80 | | NRHS |
| 1534 | SCHX | Stauffer Chemical Co. | eliminated 4/90 | | NRHS |
| 1535 | SCHX | Rhone-Poulenc Basic Chemicals Co. | added 4/90; 1/94; eliminated 10/99 | | NRHS |
| 1536 | SCHX | Rhodia, Inc. | added 10/99; 7/2000 | | NRHS |
| 1537 | SCHX | INNOPHOS, INC. [RHODIA, INC. ; (RPBX) RHONE-POULENC BASIC CHEMICALS COMPANY; STAUFFER CHEMICAL CO.] | | | PWRC |
| 1538 | SCHX | Stauffer Chemical | | | RSRV |
| 1539 | SCHZ | RETIRED 05-03-93 ATP | | | PWRC |
| 1540 | SCI | Special Cargo Airlines Joint Stock Aircompany | IATA: C7, Callsign: Special Cargo, | RUS | AVCODES |
| 1541 | SCI | Servicios Aereos San Cristobal | Callsign: San Cristobal, | MEX | AVCODES |
| 1542 | SCI | Servicios Aereos San Cristobal | | | ICAO1 |
| 1543 | SCI | ST CLAIR BUS TRANSPORTATION INC | | | SCAC4 |
| 1544 | SCIC | SEA CONTAINERS | | | PWRC |
| 1545 | SCIC | SCHILLING, F J INC | | | SCAC4 |
| 1546 | SCIF | SEACLIFF FARMS | | | SCAC4 |
| 1547 | SCIG | SCHNEIDER NATIONAL CARRIERS INC-GUA | | | SCAC4 |
| 1548 | SCIH | ISG South Chicago & Indiana Harbor Ry. Co. d/b/a South Chicago & Indiana Harbor Ry. Co. | 7/2005; eliminated 7/2007 | | NAKINA |
| 1549 | SCIH | ISG SOUTH CHICAGO & INDIANA HARBOR RWY. CO. d/b/a SOUTH CHICAGO & INDIANA HARBOR RWY. CO. | | | PWRC |
| 1550 | SCIH | ISG South Chicago and Indiana Harbor Railway | | | RSRV |
| 1551 | SCIH | SOUTH CHICAGO & INDIANA HARBOR RAIL | | | SCAC4 |
| 1552 | SCII | SOUTHEAST CONSOLIDATORS INC (LTL DI | | | SCAC4 |
| 1553 | SCIJ | SAINT CATHERINES TRANSPORTATION | | | SCAC4 |
| 1554 | SCIL | SCHIMMEL, ROBERT L | | | SCAC4 |
| 1555 | SCIU | SANDHYA ORGANIC CHEMICALS PVT LTD | | IND | BIC |
| 1556 | SCIU | SEA CONTAINERS | | | PWRC |
| 1557 | SCIU | Sea Containers | | | RSRV |
| 1558 | SCIU | SHIPPING CORP OF INDIA | | | SCAC1 |
| 1559 | SCIW | SHOKER CARRIER INC | | | SCAC4 |
| 1560 | SCIX | Samuel Cabot Inc. | 8/1920-4/1970; eliminated 7/1970 | | NAKINA |
| 1561 | SCIX | Skeena Celluose, Inc. | added 10/1987; 1/1994; eliminated 7/1994 | | NAKINA |
| 1562 | SCIX | General Electric Railcar Services Corp. | added 7/1994; eliminated 4/1998; added 4/1999; eliminated 1/2000 | | NAKINA |
| 1563 | SCIX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 1564 | SCIX | Samuel Cabot Inc. | 4/38-4/70; eliminated 7/70 | | NRHS |
| 1565 | SCIX | Skeena Celluose, Inc. | added 10/87; 1/94; eliminated 7/94 | | NRHS |
| 1566 | SCIX | General Electric Railcar Services Corp. | added 7/94; eliminated 4/98; added 4/99; eliminated 1/2000 | | NRHS |
| 1567 | SCIX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 1568 | SCIX | *SAMUEL CABOT INC | | | PWRC |
| 1569 | SCIX | *SUNRISE COOPERATIVE, INC. | | | PWRC |
| 1570 | SCIX | *SKEENA CELLULOSE, INC. | | | PWRC |
| 1571 | SCIX | +(NATX) GENERAL ELECTRIC RAIL SERVICES CORPORATION | | | PWRC |
| 1572 | SCIX | General Electric Rail Services Corporation | | | RSRV |
| 1573 | SCIX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 1574 | SCIY | SOUTH CENTRAL TRUCKING INC | | | SCAC4 |
| 1575 | SCIZ | SOLO CUP INDUSTRIES | | | PWRC |
| 1576 | SCJ | Business Jet Sweden KS | Callsign: Scanjet, | S | AVCODES |
| 1577 | SCJ | Scanjet AB | Callsign: Scanjet, | S | AVCODES |
| 1578 | SCJ | Scanjet Sweden AS | Callsign: Scanjet, | S | AVCODES |
| 1579 | SCJ | SiamJet Aviation Co.,Ltd. | Callsign: Siamjet, | T | AVCODES |
| 1580 | SCJ | Business Jet Sweden | | | ICAO1 |
| 1581 | SCJA | SPORTS CAR CLUB OF AMERICA | | | SCAC4 |
| 1582 | SCJB | SOUTHERN CROSS LOGISTICS LLC | | | SCAC4 |
| 1583 | SCJE | SUTHERLAND, C J DIESEL CO | | | SCAC4 |
| 1584 | SCJG | SCHOLES, J G TRUCKING INC | | | SCAC4 |
| 1585 | SCJI | SCHNEIDER, J M INC | | | SCAC4 |
| 1586 | SCJK | SHAMROCK CARTAGE | | | SCAC4 |
| 1587 | SCJL | SANTOS CAMACHO, JOEL | | | SCAC4 |
| 1588 | SCJP | SUPERIOR CRANES INC | | | SCAC4 |
| 1589 | SCJR | SIVLEY, CHARLES D TRUCKING | | | SCAC4 |
| 1590 | SCJT | SCOTT, JIM | | | SCAC4 |
| 1591 | SCJU | SHIPPING CORPORATION OF INDIA LTD, THE | | | SCAC1 |
| 1592 | SCJU | STAR CONTAINER SERVICES GMBH | | | SCAC4 |
| 1593 | SCJX | Spencer Chemical Co. | 4/1947-4/1961; eliminated 4/1965 | | NAKINA |
| 1594 | SCJX | Warren Petroleum Co. | added 4/1965; 7/1965-10/1966 | | NAKINA |
| 1595 | SCJX | Warren Petroleum Corp. | eliminated 1/1970 | | NAKINA |
| 1596 | SCJX | Gulf Oil Co.—U.S., Division of Gulf Oil Corp. | added 1/1970; 4/1970-1/1980; eliminated 7/1982 | | NAKINA |
| 1597 | SCJX | Gulf Refining and Marketing Co., Division of Gulf Oil Corp. | added 7/1982 | | NAKINA |
| 1598 | SCJX | Gulf Oil Products Co., Division of Gulf Oil Corp. | eliminated 7/1985 | | NAKINA |
| 1599 | SCJX | Chevron U.S.A., Inc. | 1/1994; eliminated 4/1996 | | NAKINA |
| 1600 | SCJX | Chevron Chemical Co. | added 4/1996; 7/2000; eliminated 1/2001 | | NAKINA |
