| 3501 | SFLT | STAR FLEET TRUCKING INC | | | SCAC4 |
| 3502 | SFLU | SEAFAST LOGISTICS PLC | | | SCAC4 |
| 3503 | SFLW | SUNSTONE FUELS LLC | | | SCAC4 |
| 3504 | SFLX | SOUTHERN FREIGHT LOGISTICS, INC. | | | PWRC |
| 3505 | SFLY | STOLTZFUS FEED & SUPPLY INC | | | SCAC4 |
| 3506 | SFM | A-Safar Air Services Ltd. | Callsign: Air Safar, | WAN | AVCODES |
| 3507 | SFM | A-Safar Air Services | | | ICAO1 |
| 3508 | SFM | Serveis Ferroviaris de Mallorca | | E | TRAFFIC |
| 3509 | SFM | DB Schenker Italia S.r.l | | IT | VKM |
| 3510 | SFMA | SUN FARMS | | | SCAC4 |
| 3511 | SFMB | Servizio Ferroviario Metropolitano bolognese | Real: SFM | I | TRAFFIC |
| 3512 | SFME | SEAFATHER MARITIME INC | | | SCAC4 |
| 3513 | SFMJ | SIENNA FARMS LLC | | | SCAC4 |
| 3514 | SFMK | SHIPLEY FUELS MARKETING LLC | | | SCAC4 |
| 3515 | SFML | SELENE FURNITURE MANUFACTURING CO L | | | SCAC4 |
| 3516 | SFMM | SATTERFIELD, M M OIL CO INC | | | SCAC4 |
| 3517 | SFMN | SIMCONNECT FREIGHT | | | SCAC4 |
| 3518 | SFMO | SOFTMOTION | | | SCAC4 |
| 3519 | SFMP | STUTT FARMS LTD | | | SCAC4 |
| 3520 | SFMR | SAN FRANCISCO MUNICIPAL RAILWAY | | | SCAC4 |
| 3521 | SFMU | SAIF MARITIME LLC | | UAE | BIC |
| 3522 | SFMU | SAN FU MING (SHANGHAI) TRADE CO LTD | | | SCAC4 |
| 3523 | SFMW | SCHROEDER FARMING INC | | | SCAC4 |
| 3524 | SFN | Safiran Airlines | Callsign: Safiran, Ceased operations during 2013. | IR | AVCODES |
| 3525 | SFN | Safiran Airlines | | | ICAO1 |
| 3526 | SFNC | SPECIALTY FREIGHT & COURIER | | | SCAC4 |
| 3527 | SFND | STAGE FOUR NINE (49) LTD | | | SCAC4 |
| 3528 | SFNF | SALINAS, F & F AND SONS TRUCKING | | | SCAC4 |
| 3529 | SFNH | STRESS FREE EXPRESS LLC | | | SCAC4 |
| 3530 | SFNK | SORENSEN, FRANK TRUCKING LTD | | | SCAC4 |
| 3531 | SFNL | STARFORCE NATIONAL | | | SCAC4 |
| 3532 | SFNM | SAFETRANS INC | | | SCAC4 |
| 3533 | SFNN | SEA FREIGHT INTERNATIONAL INC | | | SCAC4 |
| 3534 | SFNO | SIX FIVE NINE TWO NINE ONE ONE (659 | | | SCAC4 |
| 3535 | SFNQ | SAFRON TRANSPORT LTD | | | SCAC4 |
| 3536 | SFNU | SOVFRAHT-NN | | | SCAC4 |
| 3537 | SFO | San Francisco Airport | | USA | TRAFFIC |
| 3538 | SFOB | SLABEK FUELS INC | | | SCAC4 |
| 3539 | SFOC | STAR FIVE OIL COMPANY INC | | | SCAC4 |
| 3540 | SFOD | SEAFORD TRANSFER INC | | | SCAC4 |
| 3541 | SFOG | SUNBLEST FOODS | | | SCAC4 |
| 3542 | SFOI | STEARNS FORWARDERS INC | | | SCAC4 |
| 3543 | SFOL | SCHAEFCO INTERNATIONAL | | | SCAC4 |
| 3544 | SFOP | SFO EXPRESS | | | SCAC4 |
| 3545 | SFOR | STEEL FORCE TRANSFER LLC | | | SCAC4 |
| 3546 | SFOY | SUREFOOT LLC | | | SCAC4 |
| 3547 | SFP | Safe Air International | Callsign: Safe Air, | PK | AVCODES |
| 3548 | SFP | Safe Air | | | ICAO1 |
| 3549 | SFPB | SHELLFISH EXPRESS INC | | | SCAC4 |
| 3550 | SFPH | SAFFOLD, STEPHEN | | | SCAC4 |
| 3551 | SFPI | SF LA EXPRESS | | | SCAC4 |
| 3552 | SFPL | SUPERFORM PRODUCTS LTD | | | SCAC4 |
| 3553 | SFPM | SCLAFANI PETROLEUM INC | | | SCAC4 |
| 3554 | SFPP | Spruce Fall Power & Paper | 1/1975-1/1980 | | NAKINA |
| 3555 | SFPP | Spruce Fall Power & Paper | 1/75-1/80 | | NRHS |
| 3556 | SFPP | SPRUCE FALLS POWER & PAPER | | | PWRC |
| 3557 | SFPP | Spruce Fall Power and Paper | | | RSRV |
| 3558 | SFPP | SFP INC | | | SCAC4 |
| 3559 | SFPP | Spruce Fall Power & Paper | | USA | TRAFFIC |
| 3560 | SFPR | S & F PROPANE LLC | | | SCAC4 |
| 3561 | SFPT | SETAF SAGET | | | SCAC4 |
| 3562 | SFPV | SYSCO FRESH CUT PRODUCE | | | SCAC4 |
| 3563 | SFPW | SILVER FOX PRODUCTIONS INC | | | SCAC4 |
| 3564 | SFPY | S F SPECIALTY (L A AND S F SPECIALT | | | SCAC4 |
| 3565 | SFQ | Sahara Air Cargo Limited | IATA: Z7, IATA Prefix: 913, | EAT | AVCODES |
| 3566 | SFQ | The Burlington Northern Santa Fe Ry. Co. | 7/2000 | | NAKINA |
| 3567 | SFQ | BNSF Ry. Co. | 7/2005 | | NAKINA |
| 3568 | SFQ | The Burlington Northern Santa Fe Ry. Co. | Jul-00 | | NRHS |
| 3569 | SFQ | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE] | | | PWRC |
| 3570 | SFQ | Atchison, Topeka and Santa Fe Railway (BNSF Railway) | | | RSRV |
| 3571 | SFQC | SHARP FREIGHT SYSTEMS (IMC) | | | SCAC4 |
| 3572 | SFQP | SERVICE FIRST LOGISTICS INCORPORATE | | | SCAC4 |
| 3573 | SFQS | SHARP FREIGHT SYSTEMS | | | SCAC4 |
| 3574 | SFR | Safair Operations (Proprietary) Limited t/a FlySafair | IATA: FA, Callsign: Cargo, Name changed to Safair Operations (Proprietary) Ltd. dba Safair. Name changed from Safair (Proprietary) Ltd. | ZA | AVCODES |
| 3575 | SFR | Safair (Proprietary) Ltd. | IATA: FA, Callsign: Cargo, IATA Prefix: 640, Name changed to Safair Operations (Proprietary) Limited t/a FlySafair. Name changed from Safair Freighters (Pty) Ltd. | ZA | AVCODES |
| 3576 | SFR | Safair Operations (Proprietary) Ltd. dba Safair | IATA: FA, Callsign: Cargo, Name changed from Safair Operations (Proprietary) Limited t/a FlySafair. Name changed from Safair (Proprietary) Ltd. | ZA | AVCODES |
| 3577 | SFR | Safair Operations (Proprietary) Ltd. dba Safair | IATA: FA, Callsign: Cargo, IATA Prefix: 640, Name changed from Safair Operations (Proprietary) Limited t/a FlySafair. Name changed from Safair (Proprietary) Ltd. | ZA | AVCODES |
| 3578 | SFR | Safair | IATA: FA | | ICAO1 |
| 3579 | SFR | Southern Freight Logistics, LLC d/b/a Southern Freight R.R. | 7/2000-7/2005 | | NAKINA |
| 3580 | SFR | Southern Freight Logistics, LLC d/b/a Southern Freight R.R. | Jul-00 | | NRHS |
| 3581 | SFR | SOUTHERN FREIGHT LOGISTICS LLC d/b/a SOUTHERN FREIGHT RAILROAD | | | PWRC |
| 3582 | SFR | Southern Freight Railroad | | | RSRV |
| 3583 | SFR | SOUTHERN FREIGHT RAILROAD | | | SCAC4 |
| 3584 | SFR | SERFER Servizi Ferroviari srl | | IT | VKM |
| 3585 | SFRA | Atchison, Topeka & Santa Fe Ry. | 7/1965-1/1975 | | NAKINA |
| 3586 | SFRA | Atchison, Topeka & Santa Fe Ry. | 7/65-1/75 | | NRHS |
| 3587 | SFRA | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE] | | | PWRC |
| 3588 | SFRA | SUREFIRE TRANSPORTATION | | | SCAC4 |
| 3589 | SFRB | Atchison, Topeka & Santa Fe Ry. | 10/1957-1/1980; eliminated 1/1986 | | NAKINA |
| 3590 | SFRB | Atchison, Topeka & Santa Fe Ry. | 10/57-1/80; eliminated 1/86 | | NRHS |
| 3591 | SFRB | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE](FOR USE ON REFRIGERATOR CARS) | | | PWRC |
| 3592 | SFRB | Atchison, Topeka and Santa Fe Railway (BNSF Railway) | | | RSRV |
| 3593 | SFRC | Atchison, Topeka & Santa Fe Ry. Co. | 4/1961-1/1994; eliminated 7/1997; eliminated 4/2005 | | NAKINA |
| 3594 | SFRC | BNSF Ry. Co. | added 4/2005; 7/2005 | | NAKINA |
| 3595 | SFRC | Burlington Northern Santa Fe R.R. Co. | added 7/1997 | | NAKINA |
| 3596 | SFRC | Atchison, Topeka & Santa Fe Ry. Co. | 4/61-1/94; eliminated 7/97 | | NRHS |
| 3597 | SFRC | Burlington Northern Santa Fe R.R. Co. | added 7/97 | | NRHS |
| 3598 | SFRC | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE](FOR USE ON REFRIGERATOR CARS) | | | PWRC |
| 3599 | SFRC | Atchison, Topeka and Santa Fe Railway (BNSF Railway) | | | RSRV |
| 3600 | SFRC | STARFIRE CORPORATION | | | SCAC4 |
