# List of reporting marks: S

Note: Marks ending in U are for container owners; marks ending in X are not common carriers; marks ending in Z are for trailers without flanged wheels. All other marks are of common-carrier railroads.

## S

* SA - Savannah and Atlanta Railroad; Central of Georgia Railroad
* SAL - Seaboard Air Line Railway; Seaboard System Railroad; CSX Transportation
* SAMX - Cargill, Inc. (Seaboard Allied Milling Department)
* SAN - Sandersville Railroad
* SANX - San Angelo Tank Car Line
* SAPT - Savannah Port Terminal Railroad
* SATX - City Public Service Board of San Antonio
* SAUX - Sauvage Gas Company
* SAWX - Sawco, Inc.
* SAZX - Saz Transportation Corporation
* SB - South Buffalo Railway
* SBC - Ferrocarril Sonora Baja California
* SBD - Seaboard System Railroad; CSX Transportation
* SBGX - Industry Financial Corporation
* SBIX - Standard Brands, Inc.
* SBK - South Brooklyn Railway
* SBLN - Sterling Belt Line Railway
* SBLX - Sunbelt/Chlor/Alkali Partnership
* SBM - St. Louis, Brownsville and Mexico
* SBVR - South Branch Valley Railroad
* SC - Sumter and Choctaw Railway
* SCAX - Southern California Regional Rail Authority (Metrolink)
* SCBG - Santa Cruz, Big Trees and Pacific Railway
* SCCX - Shell Oil Company
* SCEX - Southern California Edison
* SCFE - South Central Florida Railroad
* SCFS - Straits Car Ferry Service Corporation
* SCGX - Schuler Grain Company; Eades Commodities
* SCHX - Stauffer Chemical Company
* SCJX - Gulf Oil Products Company; Chevron Phillips Chemical Company
* SCL - Seaboard Coast Line Railroad; Seaboard System Railroad; CSX Transportation
* SCLX - Spielman & Caddell Leasing
* SCM - Strouds Creek and Muddlety Railroad
* SCMX - Shell Oil Company
* SCOX - Scoular Bishop Grain Company
* SCPX - Shell Oil Company
* SCR - SCR
* SCRW - Seaway Commercial Railway
* SCST - Seaboard Transportation Company (subsidiary of Seaboard Coast Line Railroad)
* SCT - Sioux City Terminal Railway
* SCTR - South Central Tennessee Railroad
* SCWX - South Carolina Public Service Authority
* SCXF - South Central Florida Express, Inc.
* SCXY - St. Croix Valley Railroad
* SCYX - Farmers Cooperative Association of York, Nebraska
* SDA - San Diego and Arizona Railway
* SDAE - San Diego and Arizona Eastern Railway
* SDCX - AMAX Chemical Corporation
* SDER - San Diego Electric Railway
* SDEX - Swindell-Dressler Energy Supply Company
* SDIV - San Diego and Imperial Valley Railroad (expired)
* SDIY - San Diego and Imperial Valley Railroad
* SDNX - North County Transit District
* SDPX - South Dakota Soybeen Processors
* SDRX - Sounder commuter rail
* SE - Ferrocarriles Unidos del Sureste
* SECX - South-East Coal Company
* SEIX - Seimax Gas Corporation
* SEMX - Seminole Electric Cooperative
* SEPA - SEPTA
* SEPX - Southwestern Electric Power Company
* SERA - Sierra Railroad
* SERX - ACF Industries (Shippers Car Line Division)
* SFIX - System Fuels, Inc.
* SFLC - Atchison, Topeka and Santa Fe Railway; BNSF Railway
* SFLR - Shore Fast Line Railroad
* SFPP - Spruce Fall Power and Paper
* SFQ - Atchison, Topeka and Santa Fe Railway; BNSF Railway End Of Train Devices
* SFRB - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch)
* SFRC - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch)
* SFRD - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch)
* SFRE - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch)
* SFRP - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch)
* SFSR - Santa Fe Southern Railway
* SFSX - San Francisco Transportation Services Company
* SFTX - Continental Tank Car Corporation
* SGAX - SGA Leasing Company
* SGCX - Sungas Corporation of Florida
* SGIX - LPG Transportation, Inc.
* SGLR - Seminole Gulf Railway
* SH - Steelton and Highspire Railroad
* SHPX - American Industrial Transport, formerly ACF Leasing/Shippers Car Line Division
* SHQX - American Industrial Transport
* SHRX - Kansas City Railroad Museum
* SI - Spokane International Railroad; Union Pacific Railroad
* SIGX - Southern Indiana Gas and Electric Company
* SIMX - Sierra Bag Company
* SIND - Southern Indiana Railway
* SIRC - Staten Island Railway
* SIRR - Southern Industrial Railroad
* SIRX - Southern Illinois Railcar Corporation
* SJFX - Western Fuels & Asphalt Supply, Inc.; GLNX Corporation
* SJMX - St. Joe Minerals Corporation
* SJRT - St. Johns River Terminal
* SJT - St. Joseph Terminal Railroad
* SJVR - San Joaquin Valley Railroad
* SKCX - ARCO Chemical Company
* SKNX - Saskatchewan Grain Car Corporation
* SKOL - South Kansas and Oklahoma Railroad
* SKPX - Saskatchewan Grain Car Corporation
* SKSX - Safety-Kleen Systems, Inc.
* SKTX - Ski Train
* SL - Salt Lake City Southern Railroad
* SLAW - St. Lawrence Railroad
* SLAX - St. Lawrence Starch Company, Ltd.
* SLC - San Luis Central Railroad
* SLGG - Sidney and Lowe Railroad
* SLGW - Salt Lake, Garfield and Western Railway
* SLH - Sugarloaf and Hazelton Railroad
* SLOX - Selox, Inc.
* SLR - St. Lawrence and Atlantic Railroad
* SLRG - San Luis and Rio Grande Railroad
* SLRX - Southern Locomotive & Railcar
* SLSF - St. Louis - San Francisco Railway (Frisco); Burlington Northern Railroad
* SLWC - Stillwater Central Railroad
* SLTX - Slade Transport, Inc.
* SM - St. Mary's Railroad
* SMA - San Manuel Arizona Railroad
* SMCX - San Miguel Electric Cooperative
* SMEX - South Mississippi Electric Power Association
* SMMX - St. Mary's Cement Company
* SMPX - Stone Mountain Scenic Railroad
* SMRR - Sisseton Milbank Railroad
* SMNX - Solvay Minerals, Inc.
* SMRX - Southeastern Railway Museum
* SMV - Santa Maria Valley Railroad
* SN - Sacramento Northern Railway
* SNBL - Sioux City and New Orleans Barge Line
* SNCT - Seattle and North Coast Railroad
* SNFX - IND/AG Chemicals, Inc.
* SNHX - IND/AG Chemicals, Inc.
* SNJX - New Jersey Transit RiverLINE work train
* SOEX - Shell Oil Company
* SOGX - Diamond Shamrock Chemicals Company
* SOIX - Sand Seed Service, Inc.
* SOLX - Solano Rail Car Company
* SOM - Somerset Railroad
* SOO - Soo Line Railroad; Canadian Pacific Railway
* SOPR - South Pierce Railroad
* SOR - Southern Ontario Railway
* SOU - Southern Railway; Norfolk Southern Railway
* SP - Southern Pacific Railroad; Union Pacific Railroad
* SPAX - SEPTA
* SPCX - SPC Rail Group LLC
* SPEG - Spencerville and Elgin Railroad
* SPFE - Pacific Fruit Express; Southern Pacific Railroad; Union Pacific Railroad
* SPGX - Suburban Propane
* SPMW - Southern Pacific Railroad; Union Pacific Railroad (maintenance of Way)
* SPQ - Southern Pacific Railroad; Union Pacific Railroad End Of Train Devices
* SPS - Spokane, Portland and Seattle Railway; Burlington Northern Railroad
* SPSX - Progress Rail Services
* SPUD - St. Paul Union Depot Company
* SQVR - Sequatchie Valley Railroad
* SRAX - Southern Rail Associates, Inc.
* SRC - Strasburg Railroad
* SRCX - Sid Richardson Carbon Company
* SRIX - Southern Region Industrial Realty, Inc.; Southwest Rail Industries, Inc.
* SRL - Swift Refrigerator Lines (expired)
* SRLX - General American Transportation Corporation
* SRN - Sabine River and Northern Railroad
* SROX - United States Department of Energy (Savannah River Operations Office)
* SRPX - Salt River Project Agricultural Improvement and Power District
* SRRX - Star Railroad Equipment
* SRY - Southern Railway of British Columbia
* SS - Sand Springs Railway
* SSAM - Sault Ste. Marie Bridge Company (subsidiary of Wisconsin Central)
* SSDK - Savannah State Docks Railroad
* SSGX - McMaster Grain Company
* SSH - South Shore Railroad
* SSEX - Schnitzer Steel Industries
* SSIX - Itel Corporation
* SSW - St. Louis Southwestern Railway (Cotton Belt); Southern Pacific Railroad; Union Pacific Railroad
* ST - Springfield Terminal Railway; Boston and Maine Railroad; Pan Am Railways
* STAX - Stauffer Chemical Company; OCI Chemical Corporation
* STCX - Sterling China Company
* STE - Stockton Terminal and Eastern Railroad
* STER - St. Thomas and Eastern Railway
* STEX - Sterling Chemicals, Inc.
* STLE - St. Louis & Evansville Railroad Co.
* STLX - A. E. Staley
* STMA - St. Maries River Railroad
* STMX - A. E. Staley
* STOX - ACF Industries
* STRC - Stuart Chemical Transportation
* STRT - Stewartstown Railroad
* STRX - St. Regis Paper Company
* STSX - A. E. Staley
* STTX - Trailer Train Company
* STWX - Struthers Wells Corporation
* SULX - Sultran
* SUN - Sunset Railway
* SUNX - Sun Refining and Marketing Company
* SUR - State University Railroad
* SVGX - Savage services
* SVI - Southern Railway of Vancouver Island, E and N Railway
* SVIL - Saltville Railroad
* SW - Southwestern Railroad
* SWCX - Estech, Inc.
* SWFX - Southwest Forest Industries, Inc.
* SWGX - Southwest Georgia Railroad Excursion Authority/SAM Shortline Excursion Train
* SWIX - Stonewall Industries LLC
* SWLX - Essel Corporation
* SWRX - Richmond Rail Equipment Leasing Company
* SWYX - Stauffer Chemical Company of Wyoming