| 3301 | SFCE | SANCHEZ FREIGHT CORPORATION | | | SCAC4 |
| 3302 | SFCH | SILVER FOX CHARTERS INC | | | SCAC4 |
| 3303 | SFCI | STILES FUEL CO INC | | | SCAC4 |
| 3304 | SFCK | SUPREME LOGISTICS (HONG KONG) LTD | | | SCAC4 |
| 3305 | SFCM | SEATRAFFIC LTD | | | SCAC4 |
| 3306 | SFCO | SIMULATION F1 COCKPIT INC | | | SCAC4 |
| 3307 | SFCP | SAFCOMAR LINES LTD | | | SCAC4 |
| 3308 | SFCR | SAGA FOREST CARRIERS | | | SCAC1 |
| 3309 | SFCR | SAGA FOREST CARRIERS INTERNATIONAL | | | SCAC4 |
| 3310 | SFCS | ST FRANCIS XAVIER UNIVERSITY | | | SCAC4 |
| 3311 | SFCT | SAMUEL & FILS & CIE LTEE | | | SCAC4 |
| 3312 | SFCU | SOFAST SHIPPING LIMITED | | HK | BIC |
| 3313 | SFCU | Steele Fabrication | | | RSRV |
| 3314 | SFCU | SCC SIX-IN-ONE CONTAINERS CO., S.A. | | | SCAC4 |
| 3315 | SFCV | SERVCO FS COOPERATIVE INC | | | SCAC4 |
| 3316 | SFCW | STATEWIDE FREIGHT INC | | | SCAC4 |
| 3317 | SFCX | Sheffield Farms Co., Inc. | 7/1930-1/1950 | | NAKINA |
| 3318 | SFCX | Southern Fertilizer and Chemical Co. | added 1/1955; 10/1957; eliminated 4/1958 | | NAKINA |
| 3319 | SFCX | Safecar Railcar Service LLC | added 10/2003; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 3320 | SFCX | Sheffield Farms Co., Inc. | Apr-38 | | NRHS |
| 3321 | SFCX | Southern Fertilizer and Chemical Co. | Oct-57 | | NRHS |
| 3322 | SFCX | *SOUTHERN FERLILIZER & CHEMICAL CO. [SHEFFIELD FARMS CO. INC.] | | | PWRC |
| 3323 | SFCX | +SAFECAR RAILCAR SERVICE LLC | | | PWRC |
| 3324 | SFCX | SAFECAR RAILCAR SERVICES LLC | | | SCAC4 |
| 3325 | SFD | Speed Fly | Callsign: Draco, | E | AVCODES |
| 3326 | SFD | SHOWA LINE, LTD. | | | PWRC |
| 3327 | SFDE | SAFEWAY DELIVERY SERVICE INC | | | SCAC4 |
| 3328 | SFDF | SMITH FAMILY TRUCKING INC | | | SCAC4 |
| 3329 | SFDG | SEFFROOD, GREG TRUCKING | | | SCAC4 |
| 3330 | SFDH | SOUTHERN FREIGHT TRANSPORTATION INC | | | SCAC4 |
| 3331 | SFDJ | SE FREIGHT DE MEXICO SA DE | | | SCAC4 |
| 3332 | SFDK | SAFIEDINE TRUCKING LLC | | | SCAC4 |
| 3333 | SFDN | SERVICE FIRST DISTRIBUTION COMPANY | | | SCAC4 |
| 3334 | SFDR | ST CLAIR FENCE & DECK LIMITED LTD | | | SCAC4 |
| 3335 | SFDW | SF TRANSPORT LTD | | | SCAC4 |
| 3336 | SFDX | Southern Fruit Distributors, Inc. | 1/1952-4/1961; eliminated 1/1965 | | NAKINA |
| 3337 | SFDX | Southern Fruit Distributors, Inc. | 1/52-4/61; eliminated 1/65 | | NRHS |
| 3338 | SFDX | SOUTHERN FRUIT DISTRIBUTORS, INC. | | | PWRC |
| 3339 | SFDY | SHUR-GAIN USA INC | | | SCAC4 |
| 3340 | SFE | Sunsail | Callsign: Blue Water, | GB | AVCODES |
| 3341 | SFE | Travis County EMS | Callsign: Star Flight, | USA | AVCODES |
| 3342 | SFE | Sefofane Air Charters | | | ICAO1 |
| 3343 | SFE | Santa Fe | | USA | TRAFFIC |
| 3344 | SFEA | SFERRA STEEL ERECTING CO | | | SCAC4 |
| 3345 | SFED | SUPER FREIGHT EXPRESS | | | SCAC4 |
| 3346 | SFEE | SMITH, FRANCIS ERNEST | | | SCAC4 |
| 3347 | SFEF | SOUTHERN REFRIGERATED TRANSPORTATIO | | | SCAC4 |
| 3348 | SFEI | SAMIC FREIGHT LINES | | | SCAC4 |
| 3349 | SFEK | STAFEK & SON TRUCKING INC | | | SCAC4 |
| 3350 | SFEL | S F E LOGISTICS TWO INC | | | SCAC4 |
| 3351 | SFEM | SERVICE FREIGHT SYSTEMS INC | | | SCAC4 |
| 3352 | SFEN | S F ENTERPRISES | | | SCAC4 |
| 3353 | SFEN | | | I | TRAFFIC |
| 3354 | SFEO | SAFECO TRUCKLINES LTD | | | SCAC4 |
| 3355 | SFEP | SFE | | | SCAC4 |
| 3356 | SFEQ | STERLING FREIGHT LINES INC | | | SCAC4 |
| 3357 | SFES | SPECTOR FREIGHT SYSTEMS INC | | | SCAC4 |
| 3358 | SFEU | SF ENTERPRISES | | USA | BIC |
| 3359 | SFEW | SUPREME FOOD EXPRESS INC | | | SCAC4 |
| 3360 | SFEX | EASTERN RAILWAY SERVICES | | | SCAC4 |
| 3361 | SFEY | SAFEWAY INC | | | SCAC4 |
| 3362 | SFF | Safewing Aviation Company, Inc. | Callsign: Swiftwings, | USA | AVCODES |
| 3363 | SFF | Safewings Aviation Company | | | ICAO1 |
| 3364 | SFFG | STAFFORD, GEORGE C & SONS INC | | | SCAC4 |
| 3365 | SFFH | STAFF, H A LIMITED | | | SCAC4 |
| 3366 | SFFJ | STEFFY TRUCKING | | | SCAC4 |
| 3367 | SFFL | STRATES FINE FOODS | | | SCAC4 |
| 3368 | SFFN | SHOFFNER, CHARLES | | | SCAC4 |
| 3369 | SFFO | SCHIFFAHRTSGES OLTMANN VERWALTUNG M | | | SCAC4 |
| 3370 | SFFP | SYSTEM 55 TRANSPORT INC | | | SCAC4 |
| 3371 | SFFQ | STUFFERS ANTIQUES | | | SCAC4 |
| 3372 | SFFR | SUPERFAST FREIGHT SYSTEM INC | | | SCAC4 |
| 3373 | SFFR | | | USA | TRAFFIC |
| 3374 | SFFS | SCOFIELD FURNITURE STORE | | | SCAC4 |
| 3375 | SFFT | SAFFER TRADING COMPANY | | | SCAC4 |
| 3376 | SFFU | ACB AGENCIES | | B | BIC |
| 3377 | SFFV | SPLIETHOFF | | | SCAC1 |
| 3378 | SFFV | SPLIETHOFF TRANSPORT B V | | | SCAC4 |
| 3379 | SFFY | SEACLIFF AGENCY LLC | | | SCAC4 |
| 3380 | SFG | Suedflug Süddeutsche Flugges mbH | Callsign: S�dflug, | D | AVCODES |
| 3381 | SFG | Sun Freight Logistics Company Limited | IATA: UJ, | T | AVCODES |
| 3382 | SFG | Caribbean Sun Airlines, Inc | IATA: ZQ, IATA Prefix: 521, Merged with LIAT | USA | AVCODES |
| 3383 | SFG | Caribbean Sun Airlines, Inc | IATA: K8, Name changed to Caribbean Sun Airlines, Inc. d/b/a World Atlantic Airlines | USA | AVCODES |
| 3384 | SFG | Spree Flug Luftfahrt GmbH | Callsign: Colorsky, | D | AVCODES |
| 3385 | SFG | Sun Freight Logistics | | | ICAO1 |
| 3386 | SFGA | SPADER FREIGHT SERVICES INC (DEDICA | | | SCAC4 |
| 3387 | SFGB | SURFACE LOGISTICS LLC | | | SCAC4 |
| 3388 | SFGC | SAALE FARM & GRAIN COMPANY INC | | | SCAC4 |
| 3389 | SFGD | SAFEGUARD TRANSPORT, INC | | | SCAC1 |
| 3390 | SFGD | SOUTHWIND FREIGHT & GLOBAL LOGISTIC | | | SCAC4 |
| 3391 | SFGE | SAFEGUARD BY PARENT | | | SCAC4 |
| 3392 | SFGF | SIMPLE FREIGHT SOLUTIONS INC | | | SCAC4 |
| 3393 | SFGG | SOUTHERN FREIGHT TRUCKING | | | SCAC4 |
| 3394 | SFGI | STANS INC | | | SCAC4 |
| 3395 | SFGJ | SAFE CARGO LOGISTICS INC | | | SCAC4 |
| 3396 | SFGK | STAR FREIGHT LLC | | | SCAC4 |
| 3397 | SFGL | SCHENCK FARMS AND GREENHOUSES CO LT | | | SCAC4 |
| 3398 | SFGM | SALTO FREIGHT | | | SCAC4 |
| 3399 | SFGN | SAFEGUARD CRATES & TRANSPORT INC | | | SCAC4 |
| 3400 | SFGO | SPIN FREIGHT SERVICES INC | | | SCAC4 |
