| Reporting Mark | Short Line Name |
AA
| Ann Arbor Railroad
|
| ABR | Athens Line, LLC |
| ABS | Alabama Southern Railroad |
| ABWR | Alabama Warrior Railroad |
| ACJR | Ashtabula Carson Jefferson Railroad |
| ACWR | Aberdeen Carolina & Western Railway |
| ADBF | Adrian & Blissfield Railroad |
| AGR | Alabama & Gulf Coast Railway, LLC |
| AIKR | https://hawkinsrails.net/shortlines/aikr/aikr.html |
| ALE | Alabama Export Railroad |
| ALLN | Allentown & Auburn Railroad |
| ALS | Alton & Southern Railway |
| AR | Aberdeen & Rockfish Railroad Company |
| ARA | Arcade & Attica Railroad |
| ARC | Alexander Railroad Company |
| ASRY | Ashland Railway Co. |
| ATN | Alabama & Tennessee River Railway, LLC |
| ATW | Atlantic & Western Railway, L.P. |
| AUT | Autauga & Northern Railroad |
| AVR | Allegheny Valley Railroad |
| AWRY | Adams-Warnock Railway |
| BB | Buckingham Branch Railroad |
| BDRV | Belvidere & Delaware River Railway |
| BH | Bath & Hammondsport Railroad |
| BHRR | Birmingham Terminal Railway |
| BHS | Burns Harbor Shortline Railroad |
| BLOL | Bloomer Shippers Connecting RR Co. |
| BLU | Blue Ridge Southern Railroad |
| BOCT | Baltimore and Ohio Chicago Terminal Railroad |
| BPRR | Buffalo & Pittsburgh RR |
| BRC | Belt Railway Company of Chicago |
| BRW | Black River & Western Railroad |
| BSOR | Buffalo Southern Railroad |
| BVRY | Brandywine Valley Railroad Co. |
| CA | Chesapeake & Albemarle Railroad Co. |
| CAGY | Columbus & Greenville Railway Company |
| CAMY | Camp Chase Railroad |
| CCET | Cincinnati East Terminal Railway |
| CCH | Columbus & Chattahoochee Railroad |
| CCKY | Chattooga & Chickamauga Railway Co. |
| CCRL | Cleveland Commercial Railroad |
| CER | Charlotte & Western |
| CERA | Central Railroad Company of Indianapolis |
| CFE | Chicago, Fort Wayne & Eastern Railroad |
| CGR | CG Railway, Inc. |
| CHB | Cleveland Harbor Belt Railroad |
| CHR | Chestnut Ridge Railroad Corporation |
| CIC | Cedar Rapids & Iowa City Railway |
| CIND | Central Railroad Company of Indiana |
| CKIN | Chesapeake & Indiana Railroad |
| CLNA | Carolina Coastal Railway |
| CMSL | Cape May Seashore Lines |
| CNYK | Central New York Railroad Corporation |
| CORY | Columbia & Reading Railway |
| CPMY | Coopersville & Marne Railway |
| CPR | Cater Parrott Railnet |
| CRL | Chicago Rail Link |
| CSKR | C & S Railroad Corporation |
| CSS | Chicago SouthShore & South Bend RR |
| CT | Columbia Terminal |
| CTN | Canton Railroad Company |
| CUOH | Columbus & Ohio River Railroad |
| CWCY | Caldwell County Railroad Company |
| CWRO | Cleveland Works Railway Co. |
| CWRY | Commonwealth Railway Inc. |
| DC | Delray Connecting Railroad |
| DCR | Delmarva Central Railroad |
| DCRR | Dubois County Railroad Company |
| DD | Dover & Delaware River Railroad |
| DGVR | Durbin & Greenbrier Railroad |
| DL | Delaware-Lackawanna Railroad |
| DLWR | Depew/Lancaster/Western Railroad |
| DREI | Decatur & Eastern Illinois Railroad |
| DRR | Delaware & Raritan River Railroad |
| DT | Decatur Junction Railway Company |
| EARY | Eastern Alabama Railway |
| EBG | Eastern Berks Gateway Railroad |
| EBTC | East Broad Top Connecting Railroad |
| ECTB | East Chattanooga Belt Railway Company |
| EEC | East Erie Commercial RR |
| EJR | East Jersey Railroad & Terminal |
| ERRT | East Chicago Rail Terminal LLC |
| ESPN | East Penn Railroad |
| ETRY | East Tennessee Railway, LP |
| EV | Everett Railroad Co. |
| EVWR | Evansville & Western Railroad |
| EWR | Elkhart & Western Railroad Co. |
| EZR | Elizabethtown Industrial Railroad |
| FC | Fulton County Railroad Inc |
| FEC | Florida East Coast Railway |
| FGLK | Finger Lakes Railway Company |
| FIR | Flats Industrial Railroad Co. |
| GC | Georgia Central Railway, LP |
| GDLK | Grand Elk Railroad |
| GET | Gettysburg and Northern Railroad |
| GFRR | Georgia & Florida Railroad |
| GITM | Golden Isles Terminal Railroad Inc. |
| GLTR | Great Lakes Terminal Railroad LLC |
| GMR | Georgia Midland Railroad Inc |
| GR | Grand Rapids Eastern Railroad |
| GRLW | Greenville & Western Railway |
| GRW | Gary Railway |
| GRYR | Grenada Railway |
| GS | Georgia Southern Railway |
| GS | Georgia Southern Railway |
| GSM | Great Smokey Mountain Railway Inc |
| GSWR | Georgia Southwestern Railroad Company, Inc. |
| GTRA | Golden Triangle Railroad |
| HAL | Hilton & Albany Railroad |
| HIRR | Hainesport Industrail Railroad |
| HMCR | Huntsville & Madison County RR Authority |
| HOG | Heart of Georgia |
| HOS | Hoosier Southern Railroad |
| HR | Heritage Railroad Corporation |
| HRT | Hartwell Railroad Company |
| HSR | Hainesport Secondary LLC |
| IAIS | Iowa Interstate Railroad |
| ICRK | Indian Creek Railroad Company |
| IHB | Indiana Harbor Belt Railroad Company |
| IMRR | Illinois & Midland Railroad |
| IN | Indiana Northeastern Railroad Co. |
| INRD | Indiana Rail Road Company |
| IORY | Indiana & Ohio Railway |
| ISRR | Indiana Southern Railroad |
| ISRY | Iowa Southern Railway Company |
| ISW | Indiana Southwestern Railway Co. |
| ITHR | Inthaca Central Railroad |
| JAIL | Jackson & Lansing Railroad |
| JVRR | Juniata Valley Railroad |
| JXPT | Jacksonville Port Terminal Railroad |
| KBSR | Kankakee, Beaverville & Southern RR |
| KCTL | Kansas City Transportation Company LLC |
| KJRY | Keokuk Junction Railway Company |
| KNR | Kinston Railroad LLC |
| KNWA | Kanawha River Railroad |
| KRS | Katahdin Railcar Services LLC |
| KT | Kentucky and Tennessee Railway |
| KTR | Kendallville Terminal Railway Co. |
| KXCG | Knoxville & Cumberland Gap Railroad |
| KXHR | Knoxville & Holston River Railroad Co. |
| LAL | Livonia, Avon & Lakeville Railroad |
| LC | Lancaster & Chester Railway Co. |
| LER | Logansport & Eel River Short Line |
| LIRC | Louisville & Indiana Railroad |
| LMIC | Lake Michigan & Indiana RR Co. |
| LNAL | Louisville, New Albany & Corydon RR |
| LRWY | Lehigh Railway |
| LS | Luzerne & Susquehanna Railway |
| LT | Lake Terminal Railroad |
| LVR | Landisville Railroad |
| LVRB | Lehigh Valley Rail Management / Bethlehem Division |
| LVRJ | Lehigh Valley Rail Management / Johnstown Division |
| LVRR | Lycoming Valley Railroad |
| LW | Louisville & Wadley Railway |
| LXVR | Luxapalila Valley Railroad |
| MAW | Maumee & Western Railroad Corp |
| MCLR | McLaughlin Line Railroad |
| MDDE | Maryland & Delaware RR Company |
| MDS | Meridian Southern Railway |
| ME | Morristown & Erie Railway |
| MER | Missouri Eastern Railroad LLC |
| MIDH | Middletown & Hummelstown Railroad |
| MJ | Manufacturers Junction Railway |
| MMID | Maryland Midland Railway |
| MNBR | M & B Railroad, L.L.C. |
| MNJ | Middletown & NJ Ry Co. |
| MSCI | Mississippi Central Railroad Company |
| MSE | Mississippi Export Railroad Co. |
| MSO | Michigan Southern Railroad |
| MTNR | Mississippi Tennessee Railroad LLC |
| MVRY | Mahoning Valley Railway Co. |
| NBER | Nittany & Bald Eagle Railroad |
| NCIR | New Castle Industrial Railroad |
| NCRL | NC Railroad |
| NCS | Newcastle Southern Railroad |
| NDCR | N.D.C. Railroad |
| NECR | New England Central Railroad |
| NJRC | New Jersey Rail Carier, LLC |
| NJSL | New Jersey Seashore Lines INC |
| NOPB | New Orleans Public Belt |
| NOW | Northern Ohio and Western |
| NPB | Norfolk and Portsmouth Belt Line Railroad |
| NSHR | North Shore Railroad Company |
| NSR | Newburgh and South Shore RR |
| NTRY | N & T Railway |
| NYA | New York and Atlantic Railway Inc. |
| NYGL | New York & Greenwood Lake Railway |
| NYLE | New York & Lake Erie Railroad |
| NYNJ | New York New Jersey Rail, LLC |
| NYSW | New York Susquehanna & Western RY |
| OCTL | Oil Creek and Titusville Lines |
| OHPA | Ohio & Pennsylvania Railroad Company |
| OHRY | Owego & Harford Railway |
| ONCT | Ontario Central Railroad Corp. |
| ORC | Ogeechee Railroad Company |
| OSRR | Ohio Southern Railroad Inc |
| OVR | Ohio Valley Railway |
| PAL | Paducah and Louisville RR |
| PAS | Pan Am Southern |
| PHRR | Port Harbor Railroad |
| PICK | Pickens Railroad Company |
| PJR | Port Jersey Railroad Company |
| PKHP | Pickens Railway, Honea Path Division |
| POHC | Pittsburgh & Ohio Central Railroad |
| PR | Palmetto Railway |
| PRV | Pearl River Valley Railroad Company |
| PRY | Pioneer Industrial Railway |
| PSWR | Pennsylvania Southwestern Railroad Co. |
| PW | Providence & Worcester Railroad |
| RBMN | Reading, Blue Mountain & Northern RR |
| RCRY | Raritan Central Railway, L.L.C. |
| RFCC | Raleigh and Fayetteville Railroad LLC |
| RJAL | R. J. Corman Railroad Co./Childersburg Line |
| RJCC | R. J. Corman Railroad Co./Central Kentucky Lines |
| RJCL | R. J. Corman Railroad Company/Cleveland Line |
| RJCN | R. J. Corman Railroad Company/Allentown Line |
| RJCP | R. J. Corman Railroad Company/Pennsylvania Line |
| RJCW | R. J. Corman Railroad Company/Western Ohio Line |
| RSL | RSL Railroad |
| RSM | Railroad Switching Service of Missouri |
| RSR | Rochester & Southern Railroad |
| SAN | Sandersville Railroad Company |
| SAPT | Savannah Port Terminal RR Inc. |
| SBLN | Sterling Belt Line Railway |
| SCIH | South Chicago & Indiana Harbor Railroad |
| SCS | Squaw Creek Southern Railroad |
| SCXF | South Central Florida Express |
| SH | Steelton & Highspire Railroad |
| SLRS | SMS Rail Service |
| SNY | SMS Rail Lines of New York |
| SPO | South Point & Ohio Railroad LLC |
| SRC | Strasburg Railroad |
| SRNJ | Southern Railroad Co of NJ |
| ST | Springfield Terminal Railway Company |
| STRT | Stewartstown Railroad Co |
| SVRR | Shamokin Valley Railroad |
| SWP | Southwest Pennsylvania Railroad |
| TASD | Terminal Railway Alabama State Docks |
| TIR | Toledo Industrial Railroad |
| TLE | Toledo, Lake Erie & Western Railway |
| TPR | Tradepoint Rail |
| TPW | Toledo, Peoria & Western Railway |
| TRRA | Terminal Railroad Association of St Louis |
| TTR | Talleyrand Terminal Railroad |
| TYBR | Tyburn Railroad |
| TZPR | Tazewell & Peoria Railroad, Inc. |
| UCIR | Union County Industrial Railroad |
| UMP | Upper Merion & Plymouth Railroad |
| URR | Union Railroad |
| VR | Valdosta Railway, LP |
| VSRR | Virginia Southern Railroad |
| VTR | Vermont Railway |
| WBCR | Wabash Central, LLC |
| WCOR | Wellsboro & Corning Railroad |
| WE | Wheeling & Lake Erie |
| WNYP | Western New York & Pennsylvania Railroad, LLC |
| WSOR | Wisconsin Southern Railroad |
| WSRY | Winamac Southern Railway Company |
| WSS | Winston-Salem Southbound Railway Company |
| WTNN | West Tennessee Railroad, LLC |
| WTRM | Warren & Trumbull Railroad |
| WW | Winchester & Western Railway |
| WYEC | Wye Transportation Co |
| YARR | Youngstown & Austintown Railroad |
| YB | Youngstown Beltline Railroad |
| YRC | York Railway Co. |
| YSRR | Youngstown & Southeastern |
| YVRR | Yadkin Valley Railway |
