| 1 | SAN | Servicios Aereos Nacionales (SAN), S.A. | IATA: WB, Callsign: Aereos, Founded in 1964. Ceased operations in 1999. | EC | AVCODES |
| 2 | SAN | Silvair Sp. z.o.o. | Callsign: Silvar Net, | PL | AVCODES |
| 3 | SAN | Servicios Aereos Nacionales (SAN) | | | ICAO1 |
| 4 | SAN | Sandersville R.R. Co. | 7/1965-1/1994; added 4/1997; 7/2000-7/2005 | | NAKINA |
| 5 | SAN | Sandersville R.R. Co. | 7/65-1/94; added 4/97; 7/2000 | | NRHS |
| 6 | SAN | SANDERSVILLE RAILROAD COMPANY | | | PWRC |
| 7 | SAN | Sandersville Railroad | | | RSRV |
| 8 | SAN | Sandersville Railroad | | USA | TRAFFIC |
| 9 | SANA | SANTA FUEL INC | | | SCAC4 |
| 10 | SANB | SAN-REY CORPORATION | | | SCAC4 |
| 11 | SANCO | Mie Kotsu Co., Ltd. | | J | TRAFFIC |
| 12 | SANDTOFT | Trolleybus Museum at Sandtoft | | GB | TRAFFIC |
| 13 | SANE | SANTA FE TRANSPORTATION COMPANY | | | SCAC4 |
| 14 | SANEX | SANEX S.A. | | RO | VKM |
| 15 | SANF | SANFACON INDUSTRIES INC | | | SCAC4 |
| 16 | SANGI | Sangi Railway | City: San Diego | J | TRAFFIC |
| 17 | SäNJ | Sävsjöström - Nässjö Järnväg | 1914 - 1940 | S | svenska-lok.se |
| 18 | SANM | SANMAR SHIPPING LIMITED | | | SCAC4 |
| 19 | SANO | SANOIL LLC | | | SCAC4 |
| 20 | SANO | SANO-PROPAN GmbH | | DE | VKM |
| 21 | SANOK | MKS Sanok | | PL | TRAFFIC |
| 22 | SANP | SALMA TRANSPORT | | | SCAC4 |
| 23 | SANQ | SANCO TRANSPORTES | | | SCAC4 |
| 24 | SANR | SANDERS, R W TRUCKING INC | | | SCAC4 |
| 25 | SANR | Sanriku Railway | | J | TRAFFIC |
| 26 | SANRE | SANRE, spol. s r.o. | | CZ | VKM |
| 27 | SANS | Sand Springs | Real: SS | USA | TRAFFIC |
| 28 | SANSORIA | Sansori Transportation | | US-NJ | TRAFFIC |
| 29 | SANT | SANDERS TRANSFER, INC | | | SCAC1 |
| 30 | SANU | SAMSKIP HF | | IS | BIC |
| 31 | SANU | SAMBAND ISLENZKRA SAMVINNUFELAG | | | PWRC |
| 32 | SANU | Samband Islenzkra Samvinnufelag | | | RSRV |
| 33 | SANU | SAMSKIP HF | | | SCAC4 |
| 34 | SANW | SMITH&WATERS, INC | | | SCAC1 |
| 35 | SANW | SMITH & WATERS INC | | | SCAC4 |
| 36 | SANX | San Angelo Tank Car Line | added 7/1957; 10/1957-7/2005; eliminated 1/2007 | | NAKINA |
| 37 | SANX | San Angelo Tank Car Line | 10/57-7/2000 | | NRHS |
| 38 | SANX | SAN ANGELO TANK CAR LINE | | | PWRC |
| 39 | SANX | San Angelo Tank Car Line | | | RSRV |
| 40 | SANY | SANYO LOGISTICS CORPORATION | | | SCAC4 |
| 41 | SANZ | SANGAMON INDUSTRIAL | | | PWRC |
