| 7301 | SNCR | Saratoga & North Creek Railway | | USA | TRAFFIC |
| 7302 | SNCS | SCHNEIDER NATIONAL CARRIERS INC (TR | | | SCAC4 |
| 7303 | SNCT | Seattle & North Coast R.R. Co. | added 4/1980; eliminated 1/1989 | | NAKINA |
| 7304 | SNCT | Seattle & North Coast R.R. Co. | added 4/80; eliminated 1/89 | | NRHS |
| 7305 | SNCT | SEATTLE & NORTH COAST RAILROAD | | | PWRC |
| 7306 | SNCT | Seattle and North Coast Railroad | | | RSRV |
| 7307 | SNCT | SONIC TRANSPORTATION | | | SCAC4 |
| 7308 | SNCT | Seattle & North Coast | | USA | TRAFFIC |
| 7309 | SNCU | INTERNATIONAL CONTAINER LEASE INC | | PRC | BIC |
| 7310 | SNCV | | | B | TRAFFIC |
| 7311 | SNCW | SUNCOAST TRANSPORT LLC | | | SCAC4 |
| 7312 | SNCX | STEAMTOWN NATIONAL HISTORIC SITE | | | PWRC |
| 7313 | SNCY | SCHNEIDER NATIONAL CARRIERS INC-DED | | | SCAC4 |
| 7314 | SNCZ | SCHNEIDER NATIONAL LEASING | | | SCAC4 |
| 7315 | SND | SAN | Callsign: Nurlan, | KZ | AVCODES |
| 7316 | SND | Skytraders Pty Ltd. | Callsign: Snowbird, | AUS | AVCODES |
| 7317 | SND | Air Samarkand | | | ICAO1 |
| 7318 | SND | SHOWA LINE, LTD. | | | PWRC |
| 7319 | SNDB | SUNLAND DISTRIBUTION COMPANY INC | | | SCAC4 |
| 7320 | SNDC | SUND MANUFACTURING COMPANY | | | SCAC4 |
| 7321 | SNDD | SHELDON, DAVID | | | SCAC4 |
| 7322 | SNDG | STONE, DOUGLAS BERTRAN | | | SCAC4 |
| 7323 | SNDI | SAN DIEGO FREIGHT SERVICE INC | | | SCAC4 |
| 7324 | SNDK | SUNDVOR TRUCKING | | | SCAC4 |
| 7325 | SNDL | SECOND NATURE DESIGNS LTD | | | SCAC4 |
| 7326 | SNDP | SUNNYSIDE INCORPORATED | | | SCAC4 |
| 7327 | SNDQ | SONIC DELIVERY INC | | | SCAC4 |
| 7328 | SNDR | SANDERS INC | | | SCAC4 |
| 7329 | SNDS | SANDOR RENOVATIONS & DESIGN | | | SCAC4 |
| 7330 | SNDU | CANDO LOGISTICS LLC | | USA | BIC |
| 7331 | SNDU | Sandcan | | | RSRV |
| 7332 | SNDV | SANDOVAL, W TRUCKING | | | SCAC4 |
| 7333 | SNDX | SOUNDER COMMUTER RAIL | | | PWRC |
| 7334 | SNDX | Sounder Commuter Rail | | USA | TRAFFIC |
| 7335 | SNE | Servicios Aereos Norte Sur, S.A. de C.V. | Callsign: Servnorte, | MEX | AVCODES |
| 7336 | SNE | Servicios Aereos de Nicaragua, S.A. | Callsign: Sansa, | NIC | AVCODES |
| 7337 | SNE | Servicios Aereos De Nicaragua (SANSA) | | | ICAO1 |
| 7338 | SNEC | SINES ENTERPRISES INC | | | SCAC4 |
| 7339 | SNED | SANFRED ENTERPRISES INCORPORATED | | | SCAC4 |
| 7340 | SNEE | SHAWNEE EXPRESS INC | | | SCAC4 |
| 7341 | SNEF | SIX NINE EIGHT EIGHT FOUR TWO THREE | | | SCAC4 |
| 7342 | SNEG | SOUTHERN EAGLE LLC | | | SCAC4 |
| 7343 | SNEI | S&E TRUCKING, INC | | | SCAC1 |
| 7344 | SNEI | S & E TRUCKNG | | | SCAC4 |
| 7345 | SNEJ | STAGE NINE ENTERTAINMENT STORE | | | SCAC4 |
| 7346 | SNEN | SUN EXPRESS TRUCKING INC | | | SCAC4 |
| 7347 | SNEO | SUNRISE EXPRESS INC | | | SCAC4 |
| 7348 | SNEP | STEVENS CONTRACTING | | | SCAC4 |
| 7349 | SNEQ | S.T.N. ENTERPRISES | | | SCAC1 |
| 7350 | SNET | STONE TRUCK SERVICE, Railwalker, INC | | | SCAC1 |
| 7351 | SNET | STONE TRUCK SERVICE | | | SCAC4 |
| 7352 | SNEU | SCHNEIDER NATIONAL BULK CARRIERS IN | | | SCAC4 |
| 7353 | SNEW | SPECIAL DISPATCH OF CALIFORNIA INC | | | SCAC4 |
| 7354 | SNF | Shans Air, Joint-Stock Company | Callsign: Shans Air, | RUS | AVCODES |
| 7355 | SNF | Sunair | | IL | AVCODES |
| 7356 | SNF | Sunair | Callsign: Matzada, | IL | AVCODES |
| 7357 | SNF | Shans Air | | | ICAO1 |
| 7358 | SNFA | SANSONI FARMS, INC | | | SCAC1 |
| 7359 | SNFA | SNIDER FARMS ASSOCIATE | | | SCAC4 |
| 7360 | SNFB | SINACO FUEL CARRIERS | | | SCAC4 |
| 7361 | SNFC | SUNFRESH LOGISTICS | | | SCAC4 |
| 7362 | SNFD | SCHOEN FARMS LTD | | | SCAC4 |
| 7363 | SNFE | SCHUEMAN TRANSFER | | | SCAC4 |
| 7364 | SNFG | SUNBURST FREIGHT SYSTEMS INC | | | SCAC4 |
| 7365 | SNFJ | SOUTHERN CALIFORNIA TRANSPORT | | | SCAC4 |
| 7366 | SNFK | SNOWFLAKE TRANSPORTATION | | | SCAC4 |
| 7367 | SNFN | SNIFFEN, T AND SONS LLC | | | SCAC4 |
| 7368 | SNFO | SCHNEIDER LOGISTICS INC | | | SCAC4 |
| 7369 | SNFR | SANFRED TRANSPORTATION INC | | | SCAC4 |
| 7370 | SNFS | SENECA FOODS CORPORATION | | | SCAC4 |
| 7371 | SNFT | SNFT - Societá Nazionale Ferrovie e Tramvie | | I | TRAFFIC |
| 7372 | SNFU | SNF S.A.S | | F | BIC |
| 7373 | SNFU | SNF-FLOERGER | | | SCAC4 |
| 7374 | SNFV | SMITH & SONS SEAFOOD INC | | | SCAC4 |
| 7375 | SNFW | SUN FREIGHTWAYS, INC | | | SCAC1 |
| 7376 | SNFX | Shell Chemical Co., a Division of Shell Oil Co. | added 10/1966; 10/1966; eliminated 7/1969 | | NAKINA |
| 7377 | SNFX | Shell Oil Co. | added 7/1969; 4/1970-1/1980; eliminated 1/1983 | | NAKINA |
| 7378 | SNFX | IND/AG Chemicals, Inc. | added 1/1983; 1/1994-7/2005; eliminated 4/2006 | | NAKINA |
| 7379 | SNFX | Shell Chemical Co., a Division of Shell Oil Co. | added 10/66; 10/66; eliminated 7/69 | | NRHS |
| 7380 | SNFX | Shell Oil Co. | added 7/69; 4/70-1/80; eliminated 1/83 | | NRHS |
| 7381 | SNFX | IND/AG Chemicals, Inc. | added 1/83; 1/94-7/2000 | | NRHS |
| 7382 | SNFX | (SNHX) IND/AG CHEMICALS, INC. [SHELL OIL CO.; SHELL CHEMICAL CO.] | | | PWRC |
| 7383 | SNFX | IND/AG Chemicals | | | RSRV |
| 7384 | SNFY | SANFREY FREIGHT SERVICES INCORPORAT | | | SCAC4 |
| 7385 | SNG | Air Senegal International | IATA: V7, Callsign: Air Senegal, IATA Prefix: 407, Founded in 1962. Ceased operations on 24 April 2009. | SN | AVCODES |
| 7386 | SNG | LongJiang Airlines Co., Ltd. | IATA: LT, Callsign: Snow Eagle, IATA Prefix: 867, | PRC | AVCODES |
| 7387 | SNG | Air Senegal International | IATA: V7 | | ICAO1 |
| 7388 | SNG | Singergon Petroleum | | BG | VKM |
| 7389 | SNGB | S N G TRUCKING INC | | | SCAC4 |
| 7390 | SNGE | SINGER SPECIALIZED LTD | | | SCAC4 |
| 7391 | SNGF | SPRUNGS TRANSPORT & MOVERS LIMITED | | | SCAC4 |
| 7392 | SNGI | SIFUENTES AGUILAR, JOSE (MX-499578) | | | SCAC4 |
| 7393 | SNGL | SUNGLEAM MARITIME LIMITED | | | SCAC4 |
| 7394 | SNGO | SUNSHINE GREENHOUSE | | | SCAC4 |
| 7395 | SNGP | S N G TRANSPORT INC | | | SCAC4 |
| 7396 | SNGQ | SUNGLADE RANCH | | | SCAC4 |
| 7397 | SNGR | SINGING PINES WILD RICE | | | SCAC4 |
| 7398 | SNGU | SINOTRANS (GERMANY) GMBH | | | SCAC4 |
| 7399 | SNGV | SUNLINE LOGISTICAL SERVICES INCORPO | | | SCAC4 |
| 7400 | SNGX | Southeastern Natural Gas Corp. | added 4/1962; eliminated 10/1963 | | NAKINA |
