List of reporting marks: C

C

 * CA  - Chesapeake and Albemarle Railroad
 * CABU - Bacardi and Company, Ltd.
 * CABX - Cabot Corporation
 * CACV - Cooperstown and Charlotte Valley Railroad
 * CACZ - Comacasa Line
 * CAD - Cadiz Railroad
 * CADX - Cando Corporation
 * CAEG - Coffeen and Western Railroad (subsidiary of Ameren)
 * CAFU - Bay Cities Leasing Company
 * CAGX - MHC, Inc. (subsidiary of ConAgra)
 * CAGY - Columbus and Greenville Railway
 * CAGZ - Columbus and Greenville Railway
 * CAIX - Cominco American, Inc.; CAI Rail, Inc.
 * CALA - Carolina Southern Railroad
 * CALX - California Railcar Corporation
 * CAMX - Canamax Commodity Corporation
 * CAMY - Camp Chase Railway
 * CANX - CANAC International, Inc.
 * CAOX - Westlake CA and O
 * CAPX - TransAlta Utilities Corporation
 * CARR - Carrollton Railroad
 * CARX - Carlon; Lamson and Sessions
 * CARZ - Anton Caraton and Son
 * CASO - Canada Southern Railway; New York Central Railroad; Penn Central; Canadian Pacific Railway
 * CATU - CATU Containers, SA
 * CAXU - Container Applications International, Inc.
 * CBC - Carbon County Railway; Chemin de fer Baie des Chaleurs
 * CBCX - Colonial Brick Company, Inc.
 * CBFX - CIT Group/Capital Finance, Inc.
 * CBGR - Council Bluffs Railway; Great Western Railway of Iowa
 * CBHU - China Ocean Shipping Company
 * CBIU - Combi Line-Lash
 * CBIX - Central Bi-Products
 * CBL - Conemaugh and Black Lick Railroad
 * CBLU - Cooper Brothers Containers, Ltd.
 * CBNS - Cape Breton and Central Nova Scotia Railway
 * CBPU - CBSL Transportation Services, Ltd.
 * CBQ - Chicago, Burlington and Quincy Railroad; Burlington Northern Railway; Burlington Northern and Santa Fe Railway; BNSF Railway
 * CBQZ - Chicago, Burlington and Quincy Railroad; Burlington Northern Railway; Burlington Northern and Santa Fe Railway; BNSF Railway
 * CBRM - Chillicothe-Brunswick Rail Maintenance Authority
 * CBRW - Columbia Basin Railroad
 * CBRX - Charles Barthoid
 * CBRY - Copper Basin Railway
 * CBTX - Central Bi-Products
 * CBYN - Crosbyton Railway
 * CC  - Chicago Central and Pacific Railroad
 * CCAX - FDJ Leasing
 * CCBX - Union Carbide Corporation
 * CCC - Clinchfield Coal Corporation
 * CCCL - Connecticut Central Railroad
 * CCCU - Compass Container Company, Inc.
 * CCCX - Carondelet Coke Corporation
 * CCCZ - Compass Container Company, Inc.
 * CCDX - Dayton Power and Light Company
 * CCET - Cincinnati East Terminal Railway
 * CCEZ - Chicago Central and Pacific Railroad
 * CCFG - Chemin de fer Gaspésie
 * CCFZ - Chi-Can Freight Forwarding
 * CCGX - Cando Contracting, Ltd.
 * CCHX - Columbian Chemicals Canada, Ltd.
 * CCIM - Corpus Christi Terminal Railroad
 * CCIX - Stauffer Chemical Company (Consolidated Chemical Division)
 * CCIZ - Crete Intermodal
 * CCKX - California Contemporary, Inc.; CCKX, Inc.
 * CCKY - Chattooga and Chickamauga Railway
 * CCLU - Char Ching Shipping (USA), Ltd.
 * CCLX - Crystal Car Lines
 * CCMX - Calcium Carbonate Company
 * CCPR - Chelatchie Prairie Railroad
 * CCPX - Canadian Chemical Producers
 * CCQX - Construction Carrier, Inc.
 * CCR - Corinth and Counce Railroad; Kansas City Southern Railway
 * CCRR - Claremont Concord Railroad
 * CCRU - Compagnie Des Containers Reservoir
 * CCRX - Coastal Refining and Marketing, Inc.
 * CCRY - Charles City Railway
 * CCRZ - Kansas City Southern Railway
 * CCSU - Trans Ocean, Ltd.
 * CCT - Central California Traction Company
 * CCTU - Coordinated Caribbean Transport, Inc.
 * CCTX - Central Power and Light Company
 * CCTZ - Crowley Maritime Corporation
 * CCUO - Chicago-Chemung Railroad
 * CCWX - Coastal Chem, Inc.
 * CCX - Columbian Chemicals Company
 * CCXU - Char Ching Shipping (USA), Ltd.
 * CCXX - Costain Coal, Inc.
 * CDAC - Canadian American Railroad; Bangor and Aroostook Railroad; Montreal, Maine and Atlantic
 * CDAU - Canadian Tire Corporation Ltd.
 * CDAZ - Canadian Tire Corporation Ltd.
 * CDCX - Air Liquide America Corporation
 * CDEX - Coastal Distribution, LLC
 * CDGX - Carolinas Domestic Gas Company, Inc.; Chatham Oil Company
 * CDHX - Caledonian Rail Lines, LLC
 * CDLZ - Cardinal Freight Carriers
 * CDNU - Carotrans International
 * CDPX - Chevron USA, Inc.
 * CDTX - California Department of Transportation (Amtrak California)
 * CDVX - Caddo Valley Railcar Repair, Inc.
 * CEBX - Combustion Engineering, Inc.
 * CEDR - Cedar River Railroad
 * CEFX - CIT Group/Capital Finance, Inc.
 * CEI - Chicago and Eastern Illinois Railroad; Missouri Pacific Railroad; Union Pacific Railroad
 * CEIW - Central Indiana and Western Railroad
 * CELX - Celtran, Inc.
 * CEMR - Central Manitoba Railway
 * CEMX - Cementos Mexicanos, SA; Cemex Mexico, SA de CV
 * CENX - Western Aggregates, Inc.
 * CEPX - Cajun Electric Power Cooperative, Inc.; Trinity Industries Leasing
 * CERA - Central Railroad Company of Indianapolis
 * CERX - Carpenter Chemical Company; ER Carpenter, LLP
 * CETU - Custom Environmental Transport, Inc.
 * CEWX - Canadian Enterprise Gas Products
 * CF  - Cape Fear Railway
 * CFC - Chemin de fer Charlevoix
 * CFE - Chicago, Fort Wayne and Eastern
 * CFKZ - XTRA Intermodal
 * CFL - Chemin de fer Lanaudière
 * CFLX - Crestbrook Forest Industries
 * CFM - Chemin de fer de Matapédia et du Golfe
 * CFMG - Chemin de Fer de Matapédia et Gaspésie
 * CFMX - Cargill, Inc.
 * CFNR - California Northern Railroad
 * CFO - Ottawa Central Railway
 * CFPX - GE Railcar Services Corporation
 * CFQC - Quebec Central Railway
 * CFRR - Chemin de fer Rivière Romaine
 * CFRU - Cardinal Freight Carriers
 * CFS - Sartigan Railway
 * CFSX - C and T Refinery, Inc.
 * CFTX - Canadian Fertilizers, Ltd.
 * CFWR - Caney Fork and Western Railway
 * CG  - Central of Georgia Railway; Norfolk Southern Railway
 * CGA - Central of Georgia Railway; Norfolk Southern Railway
 * CGAX - Cargill, Inc. (C.G.D. Division)
 * CGBX - Procor, Ltd.; Dow Chemical Canada, Inc.
 * CGCX - Continental Grain Company
 * CGDX - Country Gas Distributors, Inc.; Eastern Propane Gas
 * CGEX - Canadian General Electric Company, Ltd.; Cargill, Inc.
 * CGFX - Consolidated Gas Company of Florida
 * CGLX - Canadian General Transit; General American Train Company
 * CGMU - Compagnie Generale Maritime
 * CGMX - GATX Rail Canada Corporation
 * CGMZ - Compagnie Generale Maritime
 * CGNE - Champagne Railroad, Inc.
 * CGOX - Cargill, Inc.
 * CGR - CG Railway
 * CGRX - Consolidated Grain and Barge Company
 * CGRY - Carrizo Gorge Railway, Inc.
 * CGSX - Proflame Incorporated
 * CGT - Canada and Gulf Terminal Railway
 * CGTU - Compagnie Generale Maritime
 * CGTX - Canadian General Transit; General American Train Company
 * CGW - Chicago Great Western Railway; Chicago and North Western Railway; Union Pacific Railroad
 * CHAT - Chattahoochee and Gulf Railroad
 * CHAU - Combined Transport Group, Inc.
 * CHAX - Chartrand's Tank Car Service, Inc.
 * CHEX - Chemplex Company; Equistar Chemicals
 * CHFU - Challenge International
 * CHH - Cheswick and Harmar
 * CHIU - Chimco - Bulgaria
 * CHLX - Chemleco, Inc.
 * CHMX - C. H. Masland and Sons; First Union Rail
 * CHOX - Sugar Express
 * CHP - Ferrocarril de Chihuahua al Pacifico, SA de CV; Ferrocarriles Nacionales de Mexico
 * CHR - Chestnut Ridge Railway
 * CHRC - Chaparral Railroad
 * CHRR - Chesapeake Railroad
 * CHRX - Chesapeake Railway Association; previously the Chesapeake Division, Railroad Enthusiasts, Inc. until 1 Dec 1999.
 * CHS  - Charlotte Southern Railroad
 * CHSX - Cenex Harvest States Cooperative
 * CHSZ - Intermodal Services, Inc.
 * CHTS - Penn Eastern Rail Lines, Inc.
 * CHTT - Chicago Heights Terminal Transfer Railroad; Missouri Pacific Railroad; Union Pacific Railroad
 * CHV - Chattahoochee Valley Railway
 * CHVX - Chevron Chemical Company
 * CHW - Chesapeake Western Railway; Norfolk Southern
 * CI  - Cambria and Indiana Railroad
 * CIBX - CIT Group/Capital Finance, Inc.
 * CIC - Cedar Rapids and Iowa City Railway (Crandic)
 * CIGX - CIT Group/Capital Finance, Inc.
 * CIIX - Contico International, Inc.
 * CIM - Chicago and Illinois Midland Railway
 * CIND - Central Railroad Company of Indiana
 * CIPX - Central Illinois Public Service Company; Ameren Energy Generating Company
 * CIR - City of Rochelle, Illinois
 * CIRR - Chattahoochee Industrial Railroad
 * CIRX - Consbec, Inc.
 * CIRY - Central Illinois Railroad
 * CISD - Colonel's Island Railroad
 * CITU - Cincinnati Union Terminal
 * CITX - CIT Group/Capital Finance, Inc.
 * CIW - Illinois Central Gulf; Illinois Central Railroad; Canadian National Railway
 * CIWN - Cincinnati, Indianapolis and Western Railroad
 * CIXX - Calciner Industries, Inc.
 * CJPX - General Electric Rail Services Corporation
 * CKIN - Chesapeake and Indiana Railroad
 * CKIX - C.K. Industries
 * CKP - Colorado Kansas and Pacific Railway
 * CKRY - Kansas and Oklahoma Railroad
 * CKSI - Carthage Knightstown and Shirley Railroad
 * CL&N - Cincinnati, Lebanon and Northern Railway
 * CLC - Columbia and Cowlitz Railway
 * CLCO - Claremont and Concord Railway
 * CLCX - Union Oil Company of California; Chattahoochee Locomotive Company
 * CLCZ - Complete Logistics Company
 * CLDZ - Celadon Trucking Services, Inc.
 * CLEX - Chemical Enterprises, Inc.; Cieco Corporation
 * CLGR - Central Louisiana and Gulf Railroad
 * CLGU - Costa Line Cargo Services
 * CLIF - Cliffside Railroad
 * CLIX - Calumet Lubricants
 * CLK - Cadillac and Lake City Railway
 * CLMX - Consolidated Thompson Iron Mines Limited
 * CLNA - Carolina Coastal Railway
 * CLOU - CLOU Container Leasing, GmbH
 * CLOX - Clark Refining and Marketing, Inc.
 * CLP - Clarendon and Pittsford Railroad
 * CLPX - Boulder Scientific Company
 * CLPZ - Clarendon and Pittsford Railroad
 * CLRX - Clayton Rail
 * CLSL - Columbia and Silver Creek Railroad
 * CLSX - Cargill (Salt Division)
 * CLTU - Chemical Leaman Tank Lines, Inc.
 * CLTX - Cloro de Tehuantepec, SA de CV
 * CM  - Central Montana Rail
 * CMBU - CMB, SA
 * CMC - CMC Railroad, Inc.
 * CMCU - Crowley Maritime Corporation
 * CMCX - Sweetman Construction Company
 * CMCZ - Crowley Maritime Corporation
 * CMDX - Cargill, Inc.
 * CMER - Curtis, Milburn and Eastern Railroad
 * CMEX - CEMEX, Inc.
 * CMG - Chicago, Milwaukee and Gary Railway
 * CMGN - Central Michigan Railway
 * CMHX - CarMath, Inc.
 * CMIX - Consolidated Minerals, Inc.
 * CMLU - Containers Marine Lines (Division of American Export Lines)
 * CMLX - Craggy Mountain Line, Inc.
 * CMLZ - Containers Marine Lines Isbrandtsen
 * CMMU - Medcontainers
 * CMO - Chicago, St. Paul, Minneapolis and Omaha Railway; Chicago and North Western Railway; Union Pacific Railroad
 * CMPA - Madison Railroad Division of City of Madison Port Authority
 * CMPU - Complete Logistics Company
 * CMQ - Central Maine and Quebec Railway
 * CMR - Central Midland Railway Company
 * CMRX - The Chemours Company, LLC
 * CMSX - Cape May Seashore Lines
 * CMSN - Crowley Marine Services
 * CMU - Columbus Charter Service
 * CMUU - Canada Maritime Agencies Limited
 * CMWX - Chateau Martin Wine
 * CN  - Canadian National Railway
 * CNA - Canadian National Railway
 * CNAZ - Grand Trunk Western Railroad; Canadian National Railway
 * CNCX - Columbia Nitrogen Corporation
 * CNDX - Connecticut Department of Transportation
 * CNE - Central New England Railway; New York, New Haven and Hartford Railroad
 * CNEU - Canadian National Railway
 * CNEZ - Canadian National Railway
 * CNGU - Sicng (Ind. Chim. Du Nord de la Grece SA)
 * CNGX - CONAG Finance, Inc.
 * CNHX - Ontario Hydro; Ontario Power Generation
 * CNIS - Canadian National Railway
 * CNJ - Central Railroad of New Jersey; Norfolk Southern
 * CNL - Columbia, Newberry and Laurens Railroad; Atlantic Coast Line Railroad; CSX Transportation
 * CNLX - CANAC International
 * CNMZ - Norfolk Southern
 * CNNU - Compania Nacional de Nabegacao
 * CNOR - Cincinnati Northern Railroad
 * CNOW - Columbia and Northern Railway
 * CNOX - Shell Canada, Ltd.
 * CNoR - Canadian Northern Railway
 * CNPU - Canadian National Railway
 * CNPZ - Canadian National Railway
 * CNQ - Canadian National Railway End Of Train Devices
 * CNRR - California Northern Railroad
 * CNRU - Canadian National Railway
 * CNRX - Canadian National Railway
 * CNRZ - Canadian National Railway
 * CNSX - Consolidated Oil and Transportation Company, Inc.
 * CNTP - Cincinnati, New Orleans and Texas Pacific Railway
 * CNTX - Continental Tank Car Corporation
 * CNUR - C&NC Railroad
 * CNVX - Convoyeur National, Inc.
 * CNW - Chicago and North Western Railway; Union Pacific Railroad
 * CNWS - Chicago and North Western Railway
 * CNWX - Canadian Wheat Board
 * CNWZ - Chicago and North Western Railway; Union Pacific Railroad
 * CNYK - Central New York Railroad
 * CNYX - Central New York Locomotive Company
 * CNZR - Central New England Railroad
 * CO  - Chesapeake and Ohio Railway; Chessie System; CSX Transportation
 * COAX - Trinity Rail Management, Inc.
 * COBX - Cobre Mining Company, Ltd.
 * COCX - Chevron Oronite Company LLC
 * COE - Colorado and Eastern Railroad
 * COEH - Conecuh Valley Railroad
 * COER - Crab Orchard and Egyptian Railroad
 * COEZ - Crab Orchard and Egyptian Railroad
 * COLX - Alliant Energy
 * COMX - Commonwealth Edison Company
 * CONU - Contrans
 * CONX - Conoco Inc.
 * COOK - Cook Transit
 * COOX - Cooperative Producers, Inc.; First Union Rail
 * COP - City of Prineville Railway
 * COPX - CanadianOxy Industrial Chemicals, LP
 * CORP - Central Oregon and Pacific Railroad
 * CORU - CATU Containers, SA
 * CORX - Coors Brewing Company
 * COSU - China Ocean Steamship, Ltd.
 * COSX - Cabot Corporation (CAB-O-SIL Division)
 * COTX - Consolidated Transportation Corporation; GLNX Corporation
 * COZ - CSX Transportation
 * CP  - Canadian Pacific Railway
 * CPAA - Canadian Pacific Railway
 * CPAX - CITGO Petroleum Corporation
 * CPBU - Soo Line; Canadian Pacific Railway
 * CPBZ - Soo Line; Canadian Pacific Railway
 * CPCX - Chevron Phillips Chemical Company
 * CPDR - South Carolina Central Railroad (Carolina Piedmont Division); Carolina Piedmont Railway
 * CPDU - Delaware and Hudson Railway
 * CPDX - Chevron USA, Inc.
 * CPDZ - Delaware and Hudson Railway
 * CPGZ - ContainerPort Group, Inc.
 * CPHX - Ontario Hydro; Ontario Power Generation
 * CPI - Canadian Pacific Railway
 * CPIX - Continental Polymers, Inc.; ICI Acrylics, Inc.
 * CPLJ - Camp Lejeune Railroad
 * CPLT - Camino, Placerville and Lake Tahoe Railroad
 * CPLX - CPLX Leasing
 * CPMY - Coopersville and Marne Railway
 * CPOX - Consumers Power Company
 * CPPU - Canadian Pacific Railway
 * CPPX - Consolidated Papers, Inc.
 * CPPZ - Canadian Pacific Railway
 * CPRS - Canadian Pacific Railway
 * CPRX - Carolina Power and Light Company
 * CPRZ - Canadian Pacific Railway
 * CPSX - Commercial Plastics Systems, Inc.
 * CPSU - CP Ships
 * CPT - Canadian Pacific Railway End Of Train Devices
 * CPVU - Containers and Pressure Vessels, Ltd.
 * CPWX - Canadian Wheat Board
 * CQPA - Central Columbiana and Pennsylvania Railway
 * CR  - Norfolk Southern
 * CRAX - Crystal Hopper Associates
 * CRAZ - Cornucopia Transportation, Inc.
 * CRCR - Crete Carrier Corporation
 * CRCX - Conrail Shared Assets Operations - Legal Name: Conrail
 * CRCZ - Norfolk Southern
 * CRDX - Chicago Freight Car Leasing Company
 * CREU - Canadian Retail Shippers Association
 * CREX - Merchants Investment Company; Citicorp Railmark, Inc.
 * CREZ - Canadian Retail Shippers Association
 * CRGX - Cargill, Inc.
 * CRIJ - Carolina Rail Services, Inc.
 * CRIX - GE Railcar Services Corporation; Citicorp Railmark, Inc.
 * CRL - Chicago Rail Link
 * CRLE - Coe Rail, Inc.
 * CRLU - Carlisle Leasing International
 * CRLX - Canadian Railserve, Ltd.
 * CRMU - Norfolk Southern
 * CRMX - The Cropmate Company
 * CRMZ - Norfolk Southern
 * CRN - Carolina and Northwestern Railway; Norfolk Southern
 * CRNX - Coffeyville Resources Nitrogen Fertilizers, LLC
 * CROX - Sylvachem Corporation
 * CRP - Central Railroad of Pennsylvania; Norfolk Southern
 * CRPU - Norfolk Southern
 * CRPX - Centennial Gas Liquids
 * CRQU - Norfolk Southern
 * CRR - Clinchfield Railroad; Seaboard System Railroad; CSX Transportation
 * CRRR - Copper Range Refrigerator
 * CRRX - Cañon City and Royal Gorge Railroad, LLC
 * CRSX - Cost Rail Service
 * CRTZ - Norfolk Southern
 * CRXU - Cronos Containers (UK)
 * CRYX - Cryo-Trans, Inc.
 * CRZ - Norfolk Southern
 * CS  - Colorado and Southern Railway; Burlington Northern Railway; Burlington Northern and Santa Fe Railway; BNSF Railway
 * CSAU - Costa Line
 * CSBX - Cargill (Salt Division)
 * CSCD - Cascade and Columbia River Railroad
 * CSCX - Oglebay Norton; Coal Supply Corporation
 * CSDX - Metropolitan Water Reclamation District of Greater Chicago
 * CSGX - Central Sand and Gravel Company
 * CSKR - C and S Railroad
 * CSKU - Consolidated Services, Inc.
 * CSL - Chicago Short Line Railway
 * CSMX - Carol and Andy Muller
 * CSNX - Cities Service Oil and Gas Corporation; Trident NGL, Inc.
 * CSO - Connecticut Southern Railroad
 * CSOR - Connecticut Southern Railroad
 * CSOX - CITGO Petroleum Corporation
 * CSP - Camas Prairie RailNet
 * CSPX - Chesapeake Speciality Products; Cities Service Company
 * CSRX - Conway Scenic Railroad
 * CSRZ - CSX Transportation
 * CSS - Chicago South Shore and South Bend Railroad
 * CSTX - Canadian Starch Company (Casco)
 * CSUX - City of Colorado Springs Department of Electric Generation
 * CSVU - Compania Sud Americana de Vapores, GmbH
 * CSWX - Central and South West Services, Inc.
 * CSX - Central Transportation Company, Inc.
 * CSXE - CSX Transportation End Of Train Devices
 * CSXT - CSX Transportation
 * CSXU - CSX Transportation
 * CSXZ - CSX Transportation
 * CSYX - Central Soya
 * CT  - Columbia Terminal Railroad
 * CTCU - Container Trading Company
 * CTCX - GE Railcar Services Corporation; Endasa, SA de CV
 * CTE - Cen-Tex Rail Link
 * CTEU - Spanish Lines
 * CTEX - Canterra Energy, Ltd.; PLM International, Inc.
 * CTGZ - Combined Transport Group, Inc.
 * CTIE - Kansas City Southern Railway
 * CTIU - CTI-Container Transport International, Inc.
 * CTIX - Southeastern Industrial Enterprises, Inc.
 * CTIZ - CTI-Container Transport International, Inc.
 * CTKU - Container Tank Services, Ltd.
 * CTLX - Endasa, SA de CV
 * CTML - Cairo Terminal Railroad
 * CTN - Canton Railroad
 * CTNX - Continental Carbon
 * CTOU - Chem-Rail Logistics, LLC
 * CTPX - Certain Teed Corporation; Courtesy Corporation
 * CTR - Clinton Terminal Railroad; Carlton Trail Railway
 * CTRN - Central of Tennessee Railway and Navigation Company
 * CTRR - Cloquet Terminal Railroad
 * CTRU - Container Trading Company
 * CTRW - Carlton Trail Railway
 * CTRX - C and T Refinery, Inc.
 * CTSU - Bibby Bros Company
 * CTSX - CTS Cement Manufacturing, Inc. (Chem Comp Systems)
 * CTSZ - Carotrans International
 * CTTX - TTX Company
 * CTUU - Container Trading Company
 * CTVX - Cleveland Terminal and Valley Railway
 * CTWU - Container Trading Company
 * CTZZ - Continental Transportation Company
 * CUEX - Colorado-Utility Electric Association
 * CUOH - Columbus and Ohio River Rail Road
 * CURB - Curtis Bay Railroad
 * CUST - Chicago Union Station Company
 * CUT - Cincinnati Union Terminal
 * CUVA - Cuyahoga Valley Railway; ISG Cleveland Works Railway
 * CV  - Central Vermont Railway; Grand Trunk Western; Canadian National Railway
 * CVC - Central Vermont Railway; Canadian National Railway
 * CVQ - Grand Trunk Western Railroad; Canadian National Railway
 * CVR - Cimarron Valley Railroad
 * CVRX - Locomotive and Tower Preservation Fund, Ltd.
 * CVRY - Caddo Valley Railroad
 * CVRZ - Grand Trunk Western Railroad; Canadian National Railway
 * CVSR - Cuyahoga Valley Scenic Railroad
 * CVYR - Caddo Valley Railroad
 * CW  - Colorado and Wyoming Railway
 * CWBX - C. W. Brooks, Inc.
 * CWCX - Canandaigua Wine Company, Inc.
 * CWCY - Caldwell County Railroad
 * CWEX - Commonwealth Edison Company; Midwest Generation, LLC
 * CWI - Chicago and Western Indiana Railroad
 * CWIU - Con-Way Intermodal
 * CWIZ - Con-Way Intermodal
 * CWMX - Chemical Waste Management, Inc.
 * CWP - Chicago, West Pullman and Southern Railroad; Chicago Rail Link
 * CWR - California Western Railroad; CWR, Inc.
 * CWRC - Central Wisconsin Railroad
 * CWRL - Central Western Railway
 * CWRO - Cleveland Works Railway
 * CWRX - CWR Transportation Co.
 * CWRY - Commonwealth Railway
 * CWRZ - Providence and Worcester Railroad
 * CWSX - USS Fabrication Division (United States Steel Corporation)
 * CWTX - ChemWest Industries, Inc.
 * CWTZ - Con-Way Truckload Services
 * CXCZ - CSX Lines, LLC
 * CXIX - Chemical Exchange Industries, Inc.
 * CXPZ - CSX Transportation
 * CXR - Colorado Pacific Railroad
 * CXRG - Colorado Pacific Rio Grande Railroad
 * CXRZ - CSX Transportation
 * CXVZ - CSX Intermodal, Inc.
 * CYCY - Crystal City Railroad
 * CYDX - Conrad Yelvington Distributors, Inc.
 * CYTX - Construcciones Y Trituaraciones, SA de CV
 * CYX - American Cyanamid Company
 * CZ  - Coahuila and Zacatecas Railway
 * CZCX - Crown Zellerbach Corporation
 * CZRY - Carrizo Gorge Railway