| 1 | SAR | Servicios Aereos Die Pilotos Ejecutivos | Callsign: Sapel, | CO | AVCODES |
| 2 | SAR | Air Rwanda | IATA: UW, Callsign: Uniform Whiskey, IATA desigantor changed to RY | RWA | AVCODES |
| 3 | SAR | SprintAir Cargo Sp. z.o.o. | Callsign: Sprintair Cargo, Founded in 2006 | PL | AVCODES |
| 4 | SAR | Canadian National Railways | added 7/2007 | | NAKINA |
| 5 | SAR | Savage Alberta Ry., Inc. | added 10/2005; eliminated 7/2007 | | NAKINA |
| 6 | SAR | CANADIAN NATUIONAL RWYS. [SAVAGE ALBERTA RWY., INC.] | | | PWRC |
| 7 | SAR | SAVAGE ALBERTA RAILWAY INC | | | SCAC4 |
| 8 | SAR | South African Railways and Harbours | | ZA | TRAFFIC |
| 9 | SAR | Sarkom Spółka Jawna | | PL | VKM |
| 10 | SARA | Saar Rail GmbH | | D | TRAFFIC |
| 11 | SARB | STAR TRANSPORT LTD | | | SCAC4 |
| 12 | SARC | SOUTHERN APPALACHIAN RAILROAD CO. | | | PWRC |
| 13 | SARC | SARCONA MANAGEMENT INC | | | SCAC4 |
| 14 | SARF | S A R M TRANSPORT INC | | | SCAC4 |
| 15 | SARG | SARGEANT TRADING LTD ODYSSEY AVIATI | | | SCAC4 |
| 16 | SARH | SARAH EXPRESS TRUCKING INC | | | SCAC4 |
| 17 | SARI | SARAI TRUCKING LTD | | | SCAC4 |
| 18 | SARJ | S A | | | SCAC4 |
| 19 | SARK | STUART, K & R | | | SCAC4 |
| 20 | SARM | Royal Italian Naval Aviation | Servizio Aeronautico della Regia Marina 1913 - 1937 | I | TRAFFIC |
| 21 | SARN | SARNIA CABINETS LTD | | | SCAC4 |
| 22 | SARO | STAR TWENTY FOUR (24) HOUR TOWING | | | SCAC4 |
| 23 | SARPA | Servicios Aéreos Panamericanos S.A.S. | | CO | TRAFFIC |
| 24 | SARR | Circus Sarrasani | | FAN | TRAFFIC |
| 25 | SARS | S & R RENTALS | | | SCAC4 |
| 26 | SART | SAS CARTAGE LLC | | | SCAC4 |
| 27 | SARU | SAR TECHNOLOGY INC. | | RC | BIC |
| 28 | SARU | NEXXUS LEASING CO LTD | | | SCAC4 |
| 29 | SARV | SANDY RIVERS HB | | | SCAC4 |
| 30 | SARX | Southern Appalachia Railway Museum | 7/2000-7/2005 (not listed) | | NAKINA |
| 31 | SARX | Vendome Tank Car Co. | added 4/1953; 7/1954; eliminated 4/1956 | | NAKINA |
| 32 | SARX | Salyer Refining Co., Inc. | 1/1952; eliminated 4/1953 | | NAKINA |
| 33 | SARX | Salyer Refining Co., Inc. | Jan-52 | | NRHS |
| 34 | SARX | Southern Appalachia Railway Museum | Jul-00 | | NRHS |
| 35 | SARX | *VENDOME TANK CAR CO. [SALYER REFINING CO.] | | | PWRC |
| 36 | SARX | +SOUTHERN APPALACHIA RAILWAY MUSEUM | | | PWRC |
| 37 | SARX | Southern Appalachia Railway Museum | | | RSRV |
| 38 | SARZ | SARGENT CORP. | | | PWRC |
