| 801 | SB&M | St. Louis, Brownsville & Mexico Ry. | 4/38-4/70 | | NRHS |
| 802 | SB&M | ST. LOUIS, BROWNSVILLE & MEXICO RWY. | | | PWRC |
| 803 | SB&R | San Benito & Rio Grande Valley Ry. (Co.) | 7/1923-7/1954 | | NAKINA |
| 804 | SB&R | San Benito & Rio Grande Valley Ry. | 4/38-1/52 | | NRHS |
| 805 | SB&R | SAN BENITO & RIO GRANDE VALLEY RWY. CO. | | | PWRC |
| 806 | SBA | Sol Linhas Aereas Ltda | Callsign: Sol Brasil, | BR | AVCODES |
| 807 | SBA | STA-MALI | | | ICAO1 |
| 808 | SBA | SUBURBAN CHARTER SERVICE INC | | | SCAC4 |
| 809 | SBAB | S & B FOOD EQUIPMENT INC | | | SCAC4 |
| 810 | SBAC | SNOWBIRDS AUTO CONNECTION LIMITED | | | SCAC4 |
| 811 | SBAE | S B EXPRESS INC | | | SCAC4 |
| 812 | SBAG | Salzburg AG | City: Salzburg | A | TRAFFIC |
| 813 | SBAH | SOUND BRIDGE | | | SCAC4 |
| 814 | SBAN | Sapporo Bankei Co. Ltd. | | J | TRAFFIC |
| 815 | SBAP | SUNBELT TRANSPORT SERVICES | | | SCAC4 |
| 816 | SBAR | STACHYRUK, BARRY | | | SCAC4 |
| 817 | SBAU | SEIBOW LOGISTICS LIMITED | | | SCAC4 |
| 818 | SBAU | Schweerbau GmbH & Co.KG | | DE | VKM |
| 819 | SBAV | SSB TRUCKING INC | | | SCAC4 |
| 820 | SBAX | Southland Gasoline Co. | 7/1923 | | NAKINA |
| 821 | SBAX | SOUTHLAND GASOLINE CO. | | | PWRC |
| 822 | SBAZ | SAN BERNARDINO AREA GOVERNMENT | | | PWRC |
| 823 | SBB | Steinman Aviation, Inc. | Callsign: Sbaer Express, | USA | AVCODES |
| 824 | SBB | Skybridge International Balkan d.o.o. | Callsign: Balkan Jet, | SR | AVCODES |
| 825 | SBB | Steinman Aviation | | | ICAO1 |
| 826 | SBB | SBB-CFF | | CH | TRAFFIC |
| 827 | SBB | Schweizerische Bundesbahnen SBB | | CH | VKM |
| 828 | SBBA | SCHLUSSE | | | SCAC4 |
| 829 | SBBC | SBB Cargo | | CH | TRAFFIC |
| 830 | SBBC | Schweizerische Bundesbahnen SBB Cargo AG | | CH | VKM |
| 831 | SBBCI | SBB Cargo International | SBB Cargo International, jointly founded at the beginning of 2011 with the intermodal transport operator Hupac, operates shuttle trains on the north-south transit routes. | CH | TRAFFIC |
| 832 | SBBCI | SBB Cargo Italia S.r.L. | | IT | VKM |
| 833 | SBBE | SLIVER | | | SCAC4 |
| 834 | SBBI | Schweizerisches Bundesbahnen, Infrastruktur | | CH | VKM |
| 835 | SBBL | SALMON BAY BARGE LINE INC | | | SCAC4 |
| 836 | SBBN | SBB INTERNATIONAL SHIPPING LLC | | | SCAC4 |
| 837 | SBBO | SOUTH OF THE BORDER TOURS | | | SCAC4 |
| 838 | SBBS | STUBBS, EMILY J | | | SCAC4 |
| 839 | SBBW | SBS BOLT & SCREW INC | | | SCAC4 |
| 840 | SBC | Star Borne Chartering Corporation | Callsign: Starborne, | RP | AVCODES |
| 841 | SBC | Emoyeni Air Charter | | | ICAO1 |
| 842 | SBC | Ferrocarriles Nacionales de Mexico | added 10/1988; 1/1994-7/2000; eliminated 1/2002; 7/2005 | | NAKINA |
| 843 | SBC | Ferrocarril Sonora Baja California, S.A. de C.V. (transferred to Ferrocarriles Nacionales de Mexico) | eliminated 10/1988 | | NAKINA |
| 844 | SBC | Ferrocarril Sonora Baja California, S.A. de C.V. | 1/1975-1/1980 | | NAKINA |
| 845 | SBC | Ferrocarril Sonora Baja California, S.A. de C.V. | 1/75-1/80 | | NRHS |
| 846 | SBC | Ferrocarril Sonora Baja California, S.A. de C.V. (transferred to Ferrocarriles Nacionales de Mexico) | eliminated 10/88 | | NRHS |
| 847 | SBC | Ferrocarriles Nacionales de Mexico | added 10/88; 1/94-7/2000 | | NRHS |
| 848 | SBC | FERROCARRILES NACIONALES DE MEXICO (FERROCARRIL SONORA BAJA CALIFORNIA) | | | PWRC |
| 849 | SBC | Ferrocarril Sonora Baja California | | | RSRV |
| 850 | SBC | Ferrocarril Sonora Baja California, S.A. de C.V. | | MEX | TRAFFIC |
| 851 | SBCA | SUBURBAN CENTRE & AUTO | | | SCAC4 |
| 852 | SBCF | SBA CONSOLIDATORS INC | | | SCAC4 |
| 853 | SBCG | SEABRIDGE MARINE SERVICES LTD | | | SCAC4 |
| 854 | SBCM | SBC FIREMASTER LTD | | | SCAC4 |
| 855 | SBCO | SST BEARING CORPORATION | | | SCAC4 |
| 856 | SBCT | SPECIALTY BRAKE & CLUTCH | | | SCAC4 |
| 857 | SBCU | SAMI BITUMEN TECHNOLOGIES PTY. LTD. | | AUS | BIC |
| 858 | SBCU | STERMANN SPEDITION HANDEL GMBH | | | SCAC4 |
| 859 | SBCV | SOMERO BROTHERS CONCRETE CONSTRUCTI | | | SCAC4 |
| 860 | SBCX | North American Car Corp. | added 7/1968; 4/1970-1/1975; eliminated 4/1975 | | NAKINA |
| 861 | SBCX | Armour Car Lines | added 1/1960; 4/1961; eliminated 1/1963 | | NAKINA |
| 862 | SBCX | San Benito Co., Inc. | 4/1947 | | NAKINA |
| 863 | SBCX | Stokely Brothers & Co., Inc. | 1/1941-1/1946 | | NAKINA |
| 864 | SBCX | Seaboard Chemical Co. | 8/1920-7/1923 | | NAKINA |
| 865 | SBCX | Armour Car Lines | added 1/60; 4/61 | | NRHS |
| 866 | SBCX | North American Car Corp. | added 7/68; 4/70-1/75; eliminated 4/75 | | NRHS |
| 867 | SBCX | *SEABOARD CHEMICAL CO. | | | PWRC |
| 868 | SBCX | *SAN BENITO CO., INC. [STOKLEY BROTHERS & CO., INC.] | | | PWRC |
| 869 | SBCX | *NORTH AMERICAN CAR CORP. [ARMOUR CAR LINES] | | | PWRC |
| 870 | SBCY | STAND BY TRUCKING | | | SCAC4 |
| 871 | SBD | Sibia Ltd. | Callsign: Sibia, | RUS | AVCODES |
| 872 | SBD | CSX Transportation, Inc. | added 7/1987; 1/1994-7/2005 | | NAKINA |
| 873 | SBD | Seaboard System R.R., Inc. | added 1/1983; eliminated 7/1987 | | NAKINA |
| 874 | SBD | Seaboard System R.R., Inc. | added 1/83; eliminated 7/87 | | NRHS |
| 875 | SBD | CSX Transportation, Inc. | added 7/87; 1/94-7/2000 | | NRHS |
| 876 | SBD | CSX TRANSPORTATION, INC. [SEABOARD SYSTEM RR] | | | PWRC |
| 877 | SBD | Seaboard System Railroad (CSX Transportation) | | | RSRV |
| 878 | SBD | Seaboard System Railroad Inc. | | USA | TRAFFIC |
| 879 | SBD | Sächsische Bau GmbH | | DE | VKM |
| 880 | SBDA | SERVICE BY DAWN | | | SCAC4 |
| 881 | SBDB | STURBRIDGE SERVICE CENTER INC | | | SCAC4 |
| 882 | SBDF | SHAW, BUDFORD TRUCKING INC | | | SCAC4 |
| 883 | SBDG | SOUTHBOUND TRUCKING | | | SCAC4 |
| 884 | SBDH | SBD REPROGRAPHICS | | | SCAC4 |
| 885 | SBDI | SANTA BARBARA SPECIAL DELIVERY, INC | | | SCAC4 |
| 886 | SBDJ | SB TRUCKING | | | SCAC4 |
| 887 | SBDK | SMITH, BRAD TRUCKING | | | SCAC4 |
| 888 | SBDM | SEABOARD MARINE LTD. | | | PWRC |
| 889 | SBDM | SEABOARD MARINE | | | SCAC4 |
| 890 | SBDN | SEABOARD TRANSPORT INC | | | SCAC4 |
| 891 | SBDQ | SHABAD TRANSPORT INC | | | SCAC4 |
| 892 | SBDR | SPANN REFRIGERATED TRANSPORT | | | SCAC4 |
| 893 | SBDT | SERVICIO BINACIONAL DE TRANSPORTE R | | | SCAC4 |
| 894 | SBDU | SAMSKIP | | | SCAC1 |
| 895 | SBDU | SAMBAND LINE | | | SCAC4 |
| 896 | SBDW | SEABRIDGE INC | | | SCAC4 |
| 897 | SBDY | STEEL TRUCKING | | | SCAC4 |
| 898 | SBDZ | CSX TRANSPORTATION, INC. [SEABOARD SYSTEM RR] | | | PWRC |
| 899 | SBDZ | Seaboard System (CSX Transportation) | | | RSRV |
| 900 | SBDZ | CSX TRANSPORTATION | | | SCAC4 |
