| Home | Reporting Marks |
| AR | Aberdeen &Rockfish |
| ACWR | Aberdeen Carolina & Western |
| AG | Abervill Grimes |
| ADBF | Adrian & Blissfield |
| AHW | Ahnapee & Western |
| ACY | Akron Canton & Yongstown (Norfolk Southern) |
| AGR | Alabama Gulf Coast |
| AAR | Alaska Railroad |
| AWW | Algeers Winslow & Western |
| AC | Algoma Central |
| ACIS | Algoma Central |
| AL | Almanor Railroad Company |
| ALQS | Aliquippa & Southern |
| AMC | Amador Central |
| AMTK | Amtrak |
| ANR | Angelina & Neches River |
| AA | Ann Arbor |
| APA | Apache |
| AN | Apalachicola Northern |
| AZER | Arizona Eastern |
| AM | Arkansas & Missouri |
| ALM | Arkansas Louisiana & Mississippi |
| AVL | Aroostook Valley |
| ADN | Ashley Drew & Northern |
| ACJR | Ashtabula Carson Jefferson |
| ATLT | At &L Railroad |
| ATSF | Atchison Topeka & Santa Fe |
| ASAB | Atlanta & St. Andrews Bay |
| AGLF | Atlantic & Gulf |
| ATW | Atlantic & Western |
| BAR | Bangor & Aroostook |
| BXN | Bauxite & Northern |
| BCLR | Bay Colony |
| BCH | Bc Hydro (Southern Railway of British Columbia) |
| BCIT | Bc Rail |
| BCOL | BC Rail |
| PGE | BC Rail former Pacific Great Eastern |
| BMS | Berlin Mills Railroad |
| BLE | Bessemer & Lake Erie |
| BS | Birmingham Southern |
| BA | Boston & Albany (* Conrail) |
| BVRY | Brandywine Valley |
| BB | Buckingham Branch |
| BPRR | Buffalo & Pittsburgh |
| BFRR | Buffalo Ridge |
| BN | Burlington Northern |
| BNSF | Burlington Northern Santa Fe |
| CBQ | Burlington Northern Santa Fe former Chicago Burlington & Quincy |
| CS | Burlington Northern Santa Fe former Colorado & Southern |
| FWD | Burlington Northern Santa Fe former Fort Worth & Denver |
| GN | Burlington Northern Santa Fe former Great Northern |
| NP | Burlington Northern Santa Fe former Northern Pacific |
| SPS | Burlington Northern Santa Fe former Spokane Portland & Seattle |
| SLSF | Burlington Northern Santa Fe former St Louisiana Francisco |
| CTML | Cairo Terminal |
| CFNR | California Northern |
| CI | Cambria and Indiana |
| BCNE | Canadian National |
| CN | Canadian National |
| CNA | Canadian National |
| CNIS | Canadian National |
| CNQ | Canadian National |
| CUVA | Canadian National former Central Vermont |
| CIW | Canadian National former Chicago & Illinois Western |
| DTS | Canadian National former Detroit & Toledo Shore Line |
| DTI | Canadian National former Detroit Toledo & Ironton |
| GMO | Canadian National former Gulf Mobile & Ohio |
| ICG | Canadian National former Illinois Central Gulf |
| NAR | Canadian National former Northern Alberta |
| WC | Canadian National former Wisconsin Central |
| CP | Canadian Pacific |
| CPAA | Canadian Pacific |
| CPI | Canadian Pacific |
| CPT | Canadian Pacific |
| D&H | Canadian Pacific former Delaware & Hudson |
| DHNY | Canadian Pacific former Delaware & Hudson |
| EN | Canadian Pacific former Esquimalt & Nanaimo |
| MILW | Canadian Pacific former Milwaukee Road |
| MNS | Canadian Pacific former Minneapolis Northfield & Southern |
| NJ | Canadian Pacific former Napierville Junction |
| QC | Canadian Pacific former Quebec Central |
| SOO | Canadian Pacific former Soo Line |
| THB | Canadian Pacific former Toronto Hamilton & Buffalo |
| CFWR | Canery Fork & Western |
| CTN | Canton Railroad |
| CIC | Cedar Rapids & Iowa City |
| CCT | Central California Traction |
| CNJ | Central of New Jersey |
| CERA | Central Railroad of Indianapolis |
| CHS | Charlotte Southern |
| CIRR | Chattahoochee Industrial |
| CIM | Chicago & Illinois Midland |
| CNW | Chicago & Northwestern |
| CC | Chicago Central & Pacific |
| CFE | Chicago Fort Wayne & Eastern |
| CRL | Chicago Rail Link |
| CSL | Chicago Short Line |
| CSS | Chicago South Shore & South Bend |
| CWP | Chicago West Pullman & Southern |
| COP | City of Pineville |
| CIR | City of Rochelle, Illinois |
| CLP | Clarendon & Pittsford |
| CW | Colorado & Wyoming |
| CLC | Columbia & Cowlitz |
| CAGY | Columbus & Greenville |
| CR | Conrail |
| BCK | Conrail former Buffalo Creek |
| CRI | Conrail former Chicago River & Indiana |
| DLW | Conrail former Delaware Lackawanna & Western |
| ERIE | Conrail former Erie |
| EL | Conrail former Erie Lackawanna |
| LV | Conrail former Lehigh Valley |
| PC | Conrail former Penn Central |
| PCA | Conrail former Penn Central |
| PAE | Conrail former Peoria & Eastern |
| RDG | Conrail former Reading |
| CBRY | Copper Basin |
| CRLE | Cor Rail |
| CCR | Cornith & Counce |
| COER | Crab Orchard & Egyptian |
| CBYN | Crosbyton Railroad |
| CO | CSX |
| AWP | CSX former Atlanta & West Point |
| ACL | CSX former Atlantic Coast Line |
| BO | CSX former Baltimore & Ohio |
| CRR | CSX former Clinchfield |
| NYC | CSX former Conrail former New York Central |
| GA | CSX former Georgia Railroad |
| LN | CSX former Louisville & Nashville |
| MON | CSX former Monon |
| MTR | CSX former Montour |
| NC | CSX former Nashville Chattanooga & St. Louis |
| PM | CSX former Pere Marquette |
| RFP | CSX former Richmond Fredericksburg & Potomac |
| SAL | CSX former Seaboard Air Line |
| SCL | CSX former Seaboard Coast Line |
| SBD | CSX former Seaboard System |
| WM | CSX former Western Maryland |
| WA | CSX former Western Railroad of Alabama |
| CSXT | CSX Transportation |
| DME | Dakota Minnesota & Eastern |
| DSRC | Dakota Southern |
| DCLR | Delaware Coast Line |
| DVS | Delta Valley & Southern |
| DSW | Denver South Western |
| DCON | Detroit Connecting |
| DNE | Duluth & Northeastern |
| DMIR | Duluth Missabe & Iron Range |
| DWC | Duluth Winnipeg & Pacific |
| EBT | East Brtoad Top |
| EACH | East Camden & Highland |
| ETRY | East Tennessee |
| EIRC | Eastern Illinois |
| ESHR | Eastern Shore |
| ETWNC | Eastern Tennessee & Western North Carolina |
| EJE | Elgin Jolirt & Eastern |
| ESE | Empire State Express |
| ELS | Escanaba & Lake Superior |
| FEC | Florida East Coast |
| FMID | Florida Midland |
| FWRC | Florida West Coast |
| FP | Fordyce & Princeton |
| FSR | Fort Smith Railroad |
| FRVR | Fox River Valley |
| FRMC | Framrail |
| GVSR | Galveston Railroad |
| GWWR | Gateway Western |
| GNWR | Genesee & Wyoming |
| GRR | Georgetown Railroad |
| GC | Georgia Central |
| GNRR | Georgia Northeastern |
| GP | Georgia Pacific |
| GSWR | Georgia Southwestern |
| GETY | Gettysburg Railroad |
| GLSR | Gloster Southern |
| GCRC | Golden Cat Railroad |
| GTRA | Golden Triangle |
| GT | Grand Trunk |
| GTW | Grand Trunk Western |
| GNA | Graysonia Nashville & Ashdown |
| GWR | Great Western |
| GBW | Green Bay & Western |
| GMRC | Green Mountain |
| GRN | Greenville & Northern |
| BM | Guilford former Boston & Maine |
| MEC | Guilford former Maine Central |
| HRGGR | H&R Trains Gazebo Garden Railroad |
| HS | Hartford & Slocomb |
| FRDN | Hartford & Slocomb former Ferdinand Railroad |
| LNAC | Hartford & Solcomb former Louisville New Albany & Corydon |
| HE | Hollis & Eastern |
| HBT | Houston Belt & Terminal |
| HESR | Huron & Eastern |
| IC | Illinois Central |
| IOCR | Indiana & Ohio Central |
| IORY | Indiana & Ohio Railway |
| IHB | Indiana Harbor Belt |
| GSOR | Indiana High Rail |
| IHRC | Indiana Hi-Rail Corporation |
| INRD | Indiana Railroad |
| ICE | Iowa Chicago & Eastern |
| IAIS | Iowa Interstate |
| IATR | Iowa Traction |
| JSRC | Jackson & Southern |
| JEFW | Jefferson Warrior |
| KBSR | Kankakee Beaverville & Southern |
| CTIE | Kansas City Southern |
| KCS | Kansas City Southern |
| CMNW | Kansas City Southern former Chicago Missouri & Western |
| KCT | Kansas City Terminal |
| KJRY | Keokuk Junction |
| KRR | Kiamichi Reilroad |
| KWT | KWT Railroad |
| KYLE | Kyle Railroad |
| LVAL | Lackawanna Valley |
| LEF | Lake Erie Franklin & Clarion |
| DM | Lake State former Detroit & Mackinac |
| LSI | Lake Superior & Ishpeming |
| LT | Lake Terminal |
| LVRC | Lamoille Valley |
| LC | Lancaster & Chester |
| LIRR | Lapeer Industrial |
| LRS | Laurinburg & Southern |
| LRWN | Little Rock & Western |
| LPN | Longview Portland & Northern |
| LNW | Louisiana & North West |
| MAA | Magma Arizona |
| MOW | Maintenance of Way |
| MJ | Manufacturers Junction Railway |
| MRS | Manufacturers Railway |
| MMID | Maryland Midland |
| MR | McCloud Railway |
| MACO | McCormick Ashland City & Nashville |
| MKC | McKeesport Connecting |
| MB | Meridian & Bigbee |
| MNCR | Metro North Commuter Railroad |
| MMRR | Mid - Michigan |
| MRR | Mid Atlantic |
| NLG | Mid Louisiana |
| MDR | Mid Louisiana Rail |
| MSRC | Mid South |
| MNRR | Minnesota Commercial |
| MDW | Minnesota Dakota & Western |
| MSV | Mississippi & Skuna Valley |
| MSDR | Mississippi Delta |
| MSE | Mississippi Export Railroad |
| MISS | Mississippi Railway |
| MNVA | Mnva Railroad |
| MET | Modesto & Empire Traction - California |
| MRL | Montana Rail Link |
| MCSA | Moscow Camden & San Augustine |
| NTR | Natchez Trace Railroad |
| NDM | National Railway of Mexico |
| CHP | National Railway of Mexico former Chihuahua Pacific |
| FCP | National Railways of Mexico former Ferrocarril Del Pacifico |
| FCM | National Railways of Mexico former Ferrocarril Mexicano |
| FUS | National Railways of Mexico former Ferrocarriles Unidos Del Sureste |
| SBC | National Railways of Mexico former Sonora Baja California |
| NKCR | Nebraska Kansas & Colorado Railnet |
| NEGS | New England Southern |
| NHVT | New Hampshire & Vermont |
| NH | New Haven |
| NOPB | New Orleans Public Belt |
| NSR | Newburg & South Shore |
| NBNR | Nicolet Badger Northern |
| NS | Norfolk Southern |
| GF | Norfolk Southern former Georgia & Florida |
| ITC | Norfolk Southern former Illinois Terminal |
| NKP | Norfolk Southern former Nickel Plate |
| NW | Norfolk Southern former Norfolk & Western |
| SOU | Norfolk Southern former Southern Railway |
| VGN | Norfolk Southern former Virginian |
| WAB | Norfolk Southern former Wabash |
| CHW | Norfolk Western former Chesapeake Western |
| NOKL | Northwestern Oklahoma |
| CG | NS former Central of Georgia |
| PRR | NS former Conrail former Pennsylvania |
| OHCR | Ohio Central |
| OAR | Old Augusta Railroad |
| OLY | Olympic Railroad |
| OLB | Omaha Lincoln & Beatrice |
| ONT | Ontario Northern |
| ONTA | Ontario Northern |
| OCE | Oregon California & Eastern |
| OPE | Oregon Pacific & Eastern |
| OTVR | Otter Trail Valley |
| PFE | Pacific Fruit Express |
| PAL | Paducah & Louisville |
| PBR | Patapsco & Black River |
| PPU | Peoria & Pekin Union Railway |
| PBNE | Philadelphia Bethlehem & New England |
| PICK | Pickens Railroad |
| PLE | Pittsburgh & Lake Erie |
| PS | Pittsburgh & Shawmut |
| PLRR | Plymouth and Lincoln |
| PCN | Point Comfort & Northern |
| PHD | Port Huron & Detroit |
| PWRR | Providence & Worcester |
| RJCM | RJ Corman Railroad Memphis Line |
| RS | Roberval & Saguenay |
| RSR | Rochester & Southern |
| ROCK | Rock Island |
| RSS | Rockdale Sandow & Southern |
| RMRR | Rockey Mountain Railcar & Railroad |
| SRN | Sabin River & Northern |
| SLC | San Luis Central |
| SLSF | Burlington Northern Santa Fe former Saint Louisiana San Francisco |
| SAN | Sandersville Railroad |
| SSAM | Sault St. & Marie |
| SWGR | Seagraves Whiteface & Lubbock |
| SGLR | Seminole Gulf |
| SMRR | Sisseton Milbank Railroad |
| SOM | Somerset Railroad |
| SB | South Buffalo Railroad |
| SCRF | South Carolina Central |
| SCFE | South Central Florida |
| SCTR | South Central Tennessee |
| SR | South Rail |
| GMSR | Southrail former Gulf & Mississippi |
| ST | Springfield Terminal |
| SLR | St Lawrence & Atlantic |
| NSL | St Lawrence & Raqueette River former Norwood & St. Lawrence |
| STMA | St Maries River |
| SM | St Marys Railroad |
| SIRT | Staten Island Rapid Transit |
| SH | Steelton & Highspire |
| STE | Stockton Terminal & Eastern |
| TCBY | Tecumseh Branch Connecting |
| TAG | Tennessee Alamaba & Georgia Railway Company |
| TSRR | Tennessee Southern |
| TASD | Terminal Railroad Alabama State Docks |
| TBER | Terre Haute Brizil & Eastern |
| TN | Texas & Northern |
| TM | Texas Mexican |
| TOE | Texas Oklahoma & Eastern |
| TSE | Texas South Eastern |
| TPW | Toledo Peoria & Western |
| MTW | Tomahawk Railway Marinette Tomahawk & Western |
| TWRY | Tradewater Railway |
| TTIS | Trans Kentucky Transportation Railroad |
| TCWR | Twin Cities & Western |
| TSRD | Twin State Railroad |
| UP | Union Pacific |
| CEI | Union Pacific former Chicago & Eastern Illinois |
| CGW | Union Pacific former Chicago Great Western |
| CHTT | Union Pacific former Chicago Heights Terninal Transfer |
| DRGW | Union Pacific former Denver Rio Grande Western |
| FDDM | Union Pacific former Fort Dodge Des Moines & Southern |
| MSTL | union Pacific former Minneapolis & St. Louis |
| BKTY | Union Pacific former Missouri - Kansas - Texas |
| MI | Union Pacific former Missouri Illinois |
| MKT | Union Pacific former Missouri Kansas & Texas |
| MKTT | Union Pacific former Missouri Kansas & Texas |
| MP | Union Pacific former Missouri Pacific |
| OKKT | Union Pacific former Oklahoma Kansas & Texas |
| OWRN | Union Pacific former Oregon - Washington Railroad & Navigation Company |
| SP | Union Pacific former Southern Pacific |
| SI | Union Pacific former Spokane International |
| SSW | Union Pacific former St Louis Southwestern (Cotton Belt) |
| TP | Union Pacific former Texas & Pacific |
| TNM | Union Pacific former Texas New Mexico |
| WP | Union Pacific former Western Pacific |
| URR | Union Railroad |
| UMP | Upper Merion & Plymouth |
| USRX | US Railways |
| VCY | Ventura County |
| VTR | Vermont Railroad |
| VT | Virginia & Truckee |
| WCRC | Washington Central |
| WLO | Waterloo Railroad |
| WCTR | WCTU Railroad |
| WIF | West India Fruit & Steamship |
| WRRC | Western Railroad |
| WE | Wheeling & Lake Erie |
| WGRR | Willamina & Grande Ronde |
| WW | Winchester & Western |
| WNFR | Winifrede Railroad |
| WICT | Wisconsin & Calumet |
| WSOR | Wisconsin & Southern |
| WCCL | Wisconsin Central Chicago Loop |
| YS | Youngstown & Southern |