| 3601 | SFRD | Atchison, Topeka & Santa Fe Ry. Co. | 4/1938-1/1980; eliminated 7/1980 | | NAKINA |
| 3602 | SFRD | Atchison, Topeka & Santa Fe Ry. Co. | 4/38-1/80; eliminated 7/80 | | NRHS |
| 3603 | SFRD | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE](FOR USE ON REFRIGERATOR CARS) | | | PWRC |
| 3604 | SFRD | Atchison, Topeka and Santa Fe Railway (BNSF Railway) | | | RSRV |
| 3605 | SFRD | SUSAN FORWARDING INC | | | SCAC4 |
| 3606 | SFRD | Santa Fe Refrigerator Dispatch | | USA | TRAFFIC |
| 3607 | SFRE | Atchison, Topeka & Santa Fe Ry. | 7/1965-1/1980; eliminated 1/1986 | | NAKINA |
| 3608 | SFRE | Atchison, Topeka & Santa Fe Ry. | 7/65-1/80; eliminated 1/86 | | NRHS |
| 3609 | SFRE | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE](FOR USE ON REFRIGERATOR CARS) | | | PWRC |
| 3610 | SFRE | Atchison, Topeka and Santa Fe Railway (BNSF Railway) | | | RSRV |
| 3611 | SFRF | Atchison, Topeka & Santa Fe Ry. | 10/1966-1/1975 | | NAKINA |
| 3612 | SFRF | Atchison, Topeka & Santa Fe Ry. | 10/66-1/75 | | NRHS |
| 3613 | SFRF | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE] | | | PWRC |
| 3614 | SFRG | STANFORD TRUCK LINE | | | SCAC4 |
| 3615 | SFRJ | SCHLAGEL FARMS LLC | | | SCAC4 |
| 3616 | SFRK | SCHAFER TRUCKING INC | | | SCAC4 |
| 3617 | SFRL | SAFECO TRANSPORT LTD | | | SCAC4 |
| 3618 | SFRM | Atchison, Topeka & Santa Fe Ry. | 7/1965-1/1975 | | NAKINA |
| 3619 | SFRM | Atchison, Topeka & Santa Fe Ry. | 7/65-1/75 | | NRHS |
| 3620 | SFRM | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE] | | | PWRC |
| 3621 | SFRM | SCHOFF FARM SERVICE INC | | | SCAC4 |
| 3622 | SFRP | Atchison, Topeka & Santa Fe Ry. | 7/1965-1/1980; eliminated 1/1981 | | NAKINA |
| 3623 | SFRP | Atchison, Topeka & Santa Fe Ry. | 7/65-1/80; eliminated 1/81 | | NRHS |
| 3624 | SFRP | BNSF RAILWAY [BURLINGTON NORTHERN & SANTA FE RWY; ATCHISON, TOPEKA & SANTA FE](FOR USE ON REFRIGERATOR CARS) | | | PWRC |
| 3625 | SFRP | Atchison, Topeka and Santa Fe Railway (BNSF Railway) | | | RSRV |
| 3626 | SFRQ | STAUFFER, STACEY C | | | SCAC4 |
| 3627 | SFRR | SCOTT FREE TRANSPORTATION SERVICES | | | SCAC4 |
| 3628 | SFRS | SPECIALTY FREIGHT SERVICES INC | | | SCAC4 |
| 3629 | SFRT | SOUTHWEST FREIGHT TRANSPORT INC | | | SCAC4 |
| 3630 | SFRU | SCANFOR BVBA | | B | BIC |
| 3631 | SFRU | SCANFOR BVBA | | | SCAC4 |
| 3632 | SFRV | SHAN FREIGHTWAYS | | | SCAC4 |
| 3633 | SFRX | Sapulpa Refining Co. | 7/1923 | | NAKINA |
| 3634 | SFRX | Southern Foundry Supply, Inc. | added 10/1996; eliminated 4/2000; 7/2000 (not listed) | | NAKINA |
| 3635 | SFRX | Philip Metals, Inc. | added 4/2001; 7/2005 | | NAKINA |
| 3636 | SFRX | Southern Foundry Supply, Inc. | added 10/96; eliminated 4/2000; 7/2000 | | NRHS |
| 3637 | SFRX | Philip Metals, Inc. | added 4/2001 | | NRHS |
| 3638 | SFRX | *SAPULPA REFINING CO. | | | PWRC |
| 3639 | SFRX | +PHILIP METALS, INC. [SOUTHERN FOUNDRY SUPPLY INCORPORATED] | | | PWRC |
| 3640 | SFRX | Philip Metals | | | RSRV |
| 3641 | SFRX | PHILIP METALS INC | | | SCAC4 |
| 3642 | SFS | Southern Frontier Air Transport Ltd. | Callsign: Southern Frontier, | CDN | AVCODES |
| 3643 | SFS | Swiss Flight Services SA | IATA: ZV, Callsign: Topo, Designator ZV* recalled by IATA. | CH | AVCODES |
| 3644 | SFS | Swiss Flight Services SA | Callsign: Topo, Designator ZV* recalled by IATA. | CH | AVCODES |
| 3645 | SFS | Southern Frontier Air Transport | | | ICAO1 |
| 3646 | SFS | Santa Fe Southern Ry., Inc. | added 7/1992; eliminated 1/1994; 1/1994 (not listed); eliminated 1/1998; 7/2000; added 7/2002, eliminated 10/2002; added 1/2004; 7/2005; eliminated 7/2008 | | NAKINA |
| 3647 | SFS | Santa Fe Southern Ry., Inc. | added 7/92; eliminated 1/94; eliminated 1/98; 7/2000 | | NRHS |
| 3648 | SFS | SANTA FE SOUTHERN RAILWAY, INC. | | | PWRC |
| 3649 | SFS | Santa Fe Southern Railway | | | RSRV |
| 3650 | SFS | SANTA FE SOUTHERN RAILWAY | | | SCAC4 |
| 3651 | SFS | Strade Ferrate Sovvenzionate | | I | TRAFFIC |
| 3652 | SFSB | SFS CARTAGE INC | | | SCAC4 |
| 3653 | SFSC | SEVILLE FREIGHT SYSTEMS INC | | | SCAC4 |
| 3654 | SFSE | SCOTT FREIGHT SERVICES | | | SCAC4 |
| 3655 | SFSF | BNSF Ry. Co. | 7/2005 | | NAKINA |
| 3656 | SFSF | BNSF RWY. CO. | | | PWRC |
| 3657 | SFSJ | SUPERIOR FREIGHT SERVICES INC | | | SCAC4 |
| 3658 | SFSK | SECURE FREIGHT SYSTEMS (USA) INC | | | SCAC4 |
| 3659 | SFSL | SANGHA FREIGHT SYSTEMS INC | | | SCAC4 |
| 3660 | SFSM | S FRANGOULIS (SHIP MANAGEMENT) LTD | | | SCAC4 |
| 3661 | SFSM | Strade Ferrate Secondarie Meridionali | | I | TRAFFIC |
| 3662 | SFSM | Strade Ferrate Secondarie Meridionali | | IT | VKM |
| 3663 | SFSN | SPLIT-FIRE SALES INC | | | SCAC4 |
| 3664 | SFSO | SMITH, FRED & SONS INC | | | SCAC4 |
| 3665 | SFSP | SERIFOS TANKER CORPORATION | | | SCAC4 |
| 3666 | SFSR | SEVEN FOUR SEVEN (747) TRANSPORT IN | | | SCAC4 |
| 3667 | SFSS | SOENKSEN FREIGHT SYSTEMS, INC | | | SCAC1 |
| 3668 | SFST | SPITFIRE FIELD SERVICES COMPANY LLC | | | SCAC4 |
| 3669 | SFSU | {CJSC "SEAFOOD-SERVICE"};ZIPCODE=220004 | | BY | BIC |
| 3670 | SFSU | DOLE FRESH FRUIT INTERNATIONAL LTD | | | SCAC4 |
| 3671 | SFSV | STANTON FARM SERVICES INC. | | | PWRC |
| 3672 | SFSV | STEELHORSE FREIGHT SERVICES INC | | | SCAC4 |
| 3673 | SFSX | San Francisco Transportation Services Co. | added 1/1978; eliminated 10/1978 | | NAKINA |
| 3674 | SFSX | San Francisco Transportation Services Co., Inc. | added 10/1978; 1/1980; eliminated 10/1983; 1/1994-7/2005 (not listed) | | NAKINA |
| 3675 | SFSX | San Francisco Transportation Services Co. | added 1/78; eliminated 10/78 | | NRHS |
| 3676 | SFSX | San Francisco Transportation Services Co., Inc. | added 10/78; 1/80; eliminated 10/83; 1/94-7/2000 | | NRHS |
| 3677 | SFSX | SAN FRANCISCO TRANSPORTATION SERVICES CO. | | | PWRC |
| 3678 | SFSX | San Francisco Transportation Services | | | RSRV |
| 3679 | SFSX | SAN FRA | | | SCAC4 |
| 3680 | SFSY | SHARK FREIGHT SYSTEMS LLC | | | SCAC4 |
| 3681 | SFT | Skyfreight, Inc. | Callsign: Skyfreight, | USA | AVCODES |
| 3682 | SFT | Skyfreight | | | ICAO1 |
| 3683 | SFT | Springfield Terminal Ry. (Illinois) | 4/1938-7/1954 | | NAKINA |
| 3684 | SFT | Springfield Terminal Ry. (Illinois) | 4/38-1/52 | | NRHS |
| 3685 | SFT | SPRINGFIELD TRERMINAL RWY. (ILLINOIS) | | | PWRC |
| 3686 | SFT | Softrans S.A. | | RO | TRAFFIC |
| 3687 | SFT | SOCIETATEA FEROVIARA DE TURISM SFT CFR SA | | RO | VKM |
| 3688 | SFTA | SUPERFICIE TERRESTRE SA DE CV | | | SCAC4 |
| 3689 | SFTC | SOLUTIONS 504 TRANSPORTATION CO INC | | | SCAC4 |
| 3690 | SFTC | Softronic | | RO | TRAFFIC |
| 3691 | SFTD | SYFRETT FEED COMPANY INC | | | SCAC4 |
| 3692 | SFTF | SWIFT FUEL TRANSPORT INC | | | SCAC4 |
| 3693 | SFTG | SEIFERT TRUCKING | | | SCAC4 |
| 3694 | SFTH | SEUFERT TRANSPORTATION SYSTEMS LIMI | | | SCAC4 |
| 3695 | SFTI | SFT INC | | | SCAC4 |
| 3696 | SFTK | SAFETEK EMERGENCY VEHICLES | | | SCAC4 |
| 3697 | SFTL | SEMPER FI TRUCKING LLC | | | SCAC4 |
| 3698 | SFTM | SARGENT FAMILY TRANSPORT | | | SCAC4 |
| 3699 | SFTR | SAFETY EXPRESS | | | SCAC4 |
| 3700 | SFTRA | SOFTRANS SRL | | RO | VKM |
