| 7401 | SNGX | Tropigas Inc. of Florida | added 10/1963; 7/1965; eliminated 1/1966 | | NAKINA |
| 7402 | SNGX | Southeastern Natural Gas Corp. | added 4/62 | | NRHS |
| 7403 | SNGX | Tropigas Inc. of Florida | 7/65; eliminated 1/66 | | NRHS |
| 7404 | SNGX | TROPICGAS INC. OF FLORIDA [SOUTHEASTERN NATURAL GAS CORP.] | | | PWRC |
| 7405 | SNGY | STEINBRUECK NATIVE GALLERY | | | SCAC4 |
| 7406 | SNH | Sunshine Air (PVT) Ltd. | Callsign: Sunlink, | CL | AVCODES |
| 7407 | SNH | Sunshine Express Airlines Pty. Ltd. d/b/a Sunshine Express Airline | IATA: CQ, ICAO Designator changed to EXL | AUS | AVCODES |
| 7408 | SNH | Senair Services | | | ICAO1 |
| 7409 | SNHA | SAIN & HEAVNER TRUCKING CO INC | | | SCAC4 |
| 7410 | SNHB | SOONEST EXPRESS INC | | | SCAC4 |
| 7411 | SNHC | SHANAHAN TRANSPORTATION INC | | | SCAC4 |
| 7412 | SNHD | S N H TRANSPORT | | | SCAC4 |
| 7413 | SNHE | SIMMONS HEALTHCARE | | | SCAC4 |
| 7414 | SNHG | S. AND H. TRUCKING CO | | | SCAC1 |
| 7415 | SNHI | SONANGOL SHIPPING HOLDING LIMITED | | | SCAC4 |
| 7416 | SNHJ | SEARSON, HARRY J LTD | | | SCAC4 |
| 7417 | SNHL | S & H TRUCKING CO | | | SCAC4 |
| 7418 | SNHM | SANCHEZ MENDEZ, ALFREDO | | | SCAC4 |
| 7419 | SNHN | SCAN-SHIPPING INC | | | SCAC4 |
| 7420 | SNHO | SIENA HOME BOUTIQUE | | | SCAC4 |
| 7421 | SNHR | SPINNER, H R CORP | | | SCAC4 |
| 7422 | SNHS | STEAMTOWN NATIONAL HISTORIC SITE | | | PWRC |
| 7423 | SNHT | SPERIAN HEARING PROTECTION LLC | | | SCAC4 |
| 7424 | SNHU | SINOTRANS CONTAINER LINES CO.,LTD. | | PRC | BIC |
| 7425 | SNHU | SINOTRANS CONTAINER LINES CO LTD | | | SCAC4 |
| 7426 | SNHW | SANTE SHIPPING | | | SCAC4 |
| 7427 | SNHX | Shell Chemical Corp. | added 4/1956; 10/1957; eliminated 4/1960 | | NAKINA |
| 7428 | SNHX | Shell Chemical Co., a Division of Shell Oil Co. | added 4/1960; 4/1961-10/1966; eliminated 7/1969 | | NAKINA |
| 7429 | SNHX | Shell Oil Co. | added 7/1969; 4/1970-1/1980; eliminated 1/1983 | | NAKINA |
| 7430 | SNHX | IND/AG Chemicals, Inc. | added 1/1983; 1/1994-7/2005; eliminated 4/2006 | | NAKINA |
| 7431 | SNHX | Shell Chemical Corp. | Oct-57 | | NRHS |
| 7432 | SNHX | Shell Chemical Co., a Division of Shell Oil Co. | 4/61-10/66; eliminated 7/69 | | NRHS |
| 7433 | SNHX | Shell Oil Co. | added 7/69; 4/70-1/80; eliminated 1/83 | | NRHS |
| 7434 | SNHX | IND/AG Chemicals, Inc. | added 1/83; 1/94-7/2000 | | NRHS |
| 7435 | SNHX | IND/AG CHEMICALS, INC. [SHELL OIL CO.; SHELL CHEMICAL CORP.] | | | PWRC |
| 7436 | SNHX | IND/AG Chemicals | | | RSRV |
| 7437 | SNHY | STONEHOUSE POTTERY | | | SCAC4 |
| 7438 | SNI | Savanah Airlines Limited | Callsign: Savanahline, | WAN | AVCODES |
| 7439 | SNI | Savanah Airlines | | | ICAO1 |
| 7440 | SNIA | SCHNEIDER NATIONAL CARRIERS INC (IN | | | SCAC4 |
| 7441 | SNID | SNIDER TRANSPORTS | | | SCAC4 |
| 7442 | SNIH | SENATOR INTERNATIONAL OCEAN LLC | | | SCAC4 |
| 7443 | SNIJ | SNIDER PETROLEUM | | | SCAC4 |
| 7444 | SNIK | STRIMBU, NICK INC | | | SCAC4 |
| 7445 | SNIL | STOLT | | | SCAC1 |
| 7446 | SNIL | SCHNEIDER NATIONAL CARRIERS INC (IN | | | SCAC4 |
| 7447 | SNIM | SANI METAL LTEE | | | SCAC4 |
| 7448 | SNIM | National Mining and Industrial Company | | RIM | TRAFFIC |
| 7449 | SNIN | SEASCAPE NAVIGATION INC | | | SCAC4 |
| 7450 | SNIO | STONE TRANSPORT | | | SCAC4 |
| 7451 | SNIP | SNIDER TRUCKING SERVICE INC | | | SCAC4 |
| 7452 | SNIQ | STANG WISCONSIN CORP | | | SCAC4 |
| 7453 | SNIU | STOLT TANK CONTAINERS LEASING LTD | | BM | BIC |
| 7454 | SNIU | STOLT TANK CONTAINERS INC | | | SCAC4 |
| 7455 | SNIY | SPENCERARL NY INC | | | SCAC4 |
| 7456 | SNJ | Skynet Asia Airways | IATA: 6J, Callsign: Newsky, Designator 6J recalled by IATA | J | AVCODES |
| 7457 | SNJ | Skynet Asia Airways | IATA: 0E, Callsign: Newsky, Designator 0E recalled by IATA | J | AVCODES |
| 7458 | SNJ | Skynet Asia Airways | IATA: LQ, Callsign: Newsky, Name changed to Solaseed Air. Designator 0E recalled by IATA | J | AVCODES |
| 7459 | SNJ | Solaseed Air | IATA: LQ, Callsign: Newsky, Name changed from Skynet Asia Airways. IATA designator changed to 6J. Designator 0E recalled by IATA | J | AVCODES |
| 7460 | SNJ | Skynet Asia Airways t/a Solaseed Air | IATA: 6J, Callsign: Newsky, Name changed from Skynet Asia Airways. IATA designator changed from LQ*. Designator 0E recalled by IATA | J | AVCODES |
| 7461 | SNJ | Solaseed Air Inc. | IATA: 6J, Callsign: Newsky, Name changed from Skynet Asia Airways. IATA designator changed from LQ*. Designator 0E recalled by IATA | J | AVCODES |
| 7462 | SNJ | Skynet Asia Airways | IATA: 6J | | ICAO1 |
| 7463 | SNJ | Stockholm - Nynäs Järnväg | 1901 - 1968 | S | svenska-lok.se |
| 7464 | SNJB | S & C TRANSPORTATION INC | | | SCAC4 |
| 7465 | SNJE | SANJEL-USA-INC | | | SCAC4 |
| 7466 | SNJH | SWSNJ WAREHOUSING INC | | | SCAC4 |
| 7467 | SNJJ | SNB TRUCKING COMPANY INC | | | SCAC4 |
| 7468 | SNJK | SCHNELL TRANSPORTATION SERVICES INC | | | SCAC4 |
| 7469 | SNJL | STRAIN HOLDINGS LLC | | | SCAC4 |
| 7470 | SNJM | SERVANTS OF JESUS AND MARY | | | SCAC4 |
| 7471 | SNJO | SCHNORE, JAMES OLIVER | | | SCAC1 |
| 7472 | SNJQ | SNA TRANSPORTAATION | | | SCAC4 |
| 7473 | SNJT | SANDS, J T CORP | | | SCAC4 |
| 7474 | SNJV | SPHEROS NORTH AMERICA INC | | | SCAC4 |
| 7475 | SNJX | SOUTHERN NEW JERSEY RAIL GROUP LLC | | | PWRC |
| 7476 | SNJX | New Jersey Transit | | | RSRV |
| 7477 | SNK | Sun Jet International, Inc. d/b/a Southeast Airlines | Callsign: Sun King, | USA | AVCODES |
| 7478 | SNK | Southeast Airlines, Inc. | IATA: SL, Callsign: Southeast, Commenced operations in 1999. Ceased operations on 30 November 2004 | USA | AVCODES |
| 7479 | SNK | Southeast Airlines (Sun Jet International) | | | ICAO1 |
| 7480 | SNKC | SANKYU U S A INCORPORATED | | | SCAC4 |
| 7481 | SNKD | SUNSHINE TRUCKING LLC | | | SCAC4 |
| 7482 | SNKF | STOCKLIN TRUCKING LLC | | | SCAC4 |
| 7483 | SNKJ | SONIC TRANSPORT | | | SCAC4 |
| 7484 | SNKL | SOUTH-NORTH TRUCKING INC | | | SCAC4 |
| 7485 | SNKM | SNOOK, M A TRUCKING LLC | | | SCAC4 |
| 7486 | SNKN | STEVENS, KEN | | | SCAC4 |
| 7487 | SNKO | SANKO KISEN (U S A) CORP | | | SCAC4 |
| 7488 | SNKP | SANTAS TRUCKING | | | SCAC4 |
| 7489 | SNKQ | SENSKE & SON TRANSFER CO | | | SCAC4 |
| 7490 | SNKR | SCANLON TRUCKING INC | | | SCAC4 |
| 7491 | SNKS | SUNTECK TRANSPORT CO INC | | | SCAC4 |
| 7492 | SNKT | STONE, NICK TRUCKING | | | SCAC4 |
| 7493 | SNKV | SHERMAN TRUCKING | | | SCAC4 |
| 7494 | SNKY | SAN CARLOS TRUCKING | | | SCAC4 |
| 7495 | SNL | Soonair Lines, Inc. | Callsign: Soonair, | USA | AVCODES |
| 7496 | SNL | Soonair Lines | | | ICAO1 |
| 7497 | SNL | Sven Neunzig | | DE | VKM |
| 7498 | SNLA | S & L CARTAGE INC | | | SCAC4 |
| 7499 | SNLB | SCHURMAN-LANGE CO INC | | | SCAC4 |
| 7500 | SNLD | SNL DISTRIBUTION SERVICES CORPORATI | | | SCAC4 |
