| 7901 | RSPN | R & S TRANSPORTATON | SCAC3 | ||
| 7902 | RSPO | R & S TRANSPORTATION | SCAC3 | ||
| 7903 | RSPO | R & S TRANSPORTATION INC | SCAC4 | ||
| 7904 | RSPR | R & S TRANSPORT | SCAC3 | ||
| 7905 | RSPR | ROLLE, S P TRUCKING | SCAC4 | ||
| 7906 | RSPS | R S P EXPRESS INC | SCAC4 | ||
| 7907 | RSPT | R S TRANSPORTATION | SCAC3 | ||
| 7908 | RSPX | General Electric Railcar Services Corp. | added 10/1992; 1/1994; eliminated 10/1994 | NAKINA | |
| 7909 | RSPX | Itel Rail Corp. | added 4/1988; eliminated 10/1992 | NAKINA | |
| 7910 | RSPX | Evans Railcar Leasing Co. | added 10/1980; eliminated 4/1988 | NAKINA | |
| 7911 | RSPX | United States Railway Leasing Co. | 1/1980; eliminated 10/1980 | NAKINA | |
| 7912 | RSPX | United States Leasing Co. | added 7/1979 | NAKINA | |
| 7913 | RSPX | United States Railway Equipment Co. | added 7/1970; 1/1975; eliminated 7/1979 | NAKINA | |
| 7914 | RSPX | United States Railway Leasing Co. | added 4/1970; 4/1970; eliminated 7/1970 | NAKINA | |
| 7915 | RSPX | RSP Car Co. | added 7/1960; 4/1961-10/1966; eliminated 4/1970 | NAKINA | |
| 7916 | RSPX | RSP Car Co. | added 7/60; 4/61-10/66; eliminated 4/70 | NRHS | |
| 7917 | RSPX | United States Railway Leasing Co. | added 4/70; 4/70; eliminated 7/70 | NRHS | |
| 7918 | RSPX | United States Railway Equipment Co. | added 7/70; 1/75; eliminated 7/79 | NRHS | |
| 7919 | RSPX | United States Leasing Co. | added 7/79 | NRHS | |
| 7920 | RSPX | United States Railway Leasing Co. | 1/80; eliminated 10/80 | NRHS | |
| 7921 | RSPX | Evans Railcar Leasing Co. | added 10/80; eliminated 4/88 | NRHS | |
| 7922 | RSPX | Itel Rail Corp. | added 4/88; eliminated 10/92 | NRHS | |
| 7923 | RSPX | General Electric Railcar Services Corp. | added 10/92; 1/94; eliminated 10/94 | NRHS | |
| 7924 | RSPX | (NATX) GEN. ELECTRIC RAILCAR SERVICES CORP. [ITEL RAIL CORP.; EVANS RAILCAR LEASING CO.; U.S. RAILWAY LEASING CO.; RSP CAR CO.] | PWRC | ||
| 7925 | RSPX | Evans Railcar Leasing (GE Railcar Services) | RSRV | ||
| 7926 | RSPX | RSP CAR CO | SCAC3 | ||
| 7927 | RSPZ | TRANSAMERICA LEASING INC [(REAZ) SOUTHERN PACIFIC TRANSP CO] | PWRC | ||
| 7928 | RSPZ | TAL International (Union Pacific) | RSRV | ||
| 7929 | RSPZ | TRANSAMERICA LEASING INC | SCAC4 | ||
| 7930 | RSQ | International SOS WIndhoek | ICAO1 | ||
| 7931 | RSQN | RICHARDS ENTERPRISES INC | SCAC4 | ||
| 7932 | RSQP | R & S EQUIPMENT | SCAC4 | ||
| 7933 | RSR | Aero-Service | IATA: BF | ICAO1 | |
| 7934 | RSR | Rochester & Southern R.R., Inc. | added 10/1986; eliminated 7/1993; 1/1994-7/2005 | NAKINA | |
| 7935 | RSR | Rochester & Southern R.R., Inc. | added 10/86; eliminated 7/93; 1/94-7/2000 | NRHS | |
| 7936 | RSR | ROCHESTER & SOUTHERN RAILROAD, INC. | PWRC | ||
| 7937 | RSR | Rochester and Southern Railroad | RSRV | ||
| 7938 | RSRB | RISING SON RECORDS | SCAC4 | ||
| 7939 | RSRC | RESOURCE TRANSPORT INC | SCAC4 | ||
| 7940 | RSRD | REISNER DISTRIBUTING INC | SCAC4 | ||
| 7941 | RSRE | R S R ENTERPRISES LTD | SCAC3 | ||
| 7942 | RSRE | RS RUSH TRANSFER XPRESS INC | SCAC4 | ||
| 7943 | RSRG | ROSERIDGE TRUCKING INC | SCAC4 | ||
| 7944 | RSRI | REVERE SMELTING & REFINING CORP | SCAC3 | ||
| 7945 | RSRI | RICER CO INC | SCAC4 | ||
| 7946 | RSRK | ROBINSON, RICKY | SCAC3 | ||
| 7947 | RSRL | ROIATTI SRL | SCAC4 | ||
| 7948 | RSRM | RSR MOTORSPORTS | SCAC4 | ||
| 7949 | RSRO | REFRIGERADOS SAN ROBERTO SA DE CV | SCAC4 | ||
| 7950 | RSRP | ROADSTAR TRANSPORT COMPANY LTD | SCAC4 | ||
| 7951 | RSRQ | ROSE STAR TRANSPORTATION LLC | SCAC4 | ||
| 7952 | RSRU | NORFOLK SOUTHERN RAILWAY COMPANY | PWRC | ||
| 7953 | RSRX | Revere Sugar Refinery | 1/1943-4/1947; added 4/1953; 7/1954-1/1975; eliminated 1/1979 | NAKINA | |
| 7954 | RSRX | *REVERE SUGAR REFINERY | PWRC | ||
| 7955 | RSRX | *RIMROCK SCENIC RAIL TOURS | PWRC | ||
| 7956 | RSRX | REVERE SUGAR REFINERY | SCAC3 | ||
| 7957 | RSRY | RAYS SEPTIC & ROOTER SERVICES LTD | SCAC4 | ||
| 7958 | RSRZ | (NS) RETIRED 04-06-93 ATP | PWRC | ||
| 7959 | RSRZ | Norfolk Southern Railway | RSRV | ||
| 7960 | RSS | Rossair | ICAO1 | ||
| 7961 | RSS | Rockdale, Sandow & Southern R.R. Co. | 1/1975-1/1980; added 7/1980; 1/1994-7/2005 | NAKINA | |
| 7962 | RSS | Rockdale, Sandow & Southern R.R. Co. | 1/75-1/80; added 7/80; 1/94-7/2000 | NRHS | |
| 7963 | RSS | *ROCHESTER SUBWAY | PWRC | ||
| 7964 | RSS | +ROCKDALE, SANDOW & SOUTHERN RAILROAD CO. | PWRC | ||
| 7965 | RSS | Rochester Subway (Rockdale, Sandow and Southern Railroad) | RSRV | ||
| 7966 | RSSA | ROADMASTER TRANSPORTATION, INC. | SCAC3 | ||
| 7967 | RSSA | ROADMASTER TRANSPORTATION INC | SCAC4 | ||
| 7968 | RSSB | ROSS BROTHERS | SCAC3 | ||
| 7969 | RSSC | ROSSI CARTAGE INC | SCAC3 | ||
| 7970 | RSSC | REGENT SEVEN SEAS CRUISES INC | SCAC4 | ||
| 7971 | RSSE | ROSSI CORPORATION | SCAC4 | ||
| 7972 | RSSF | RUSSELL FARMS | SCAC3 | ||
| 7973 | RSSH | ROSARIO SHIPPING AND TRADING S.A. | SCAC3 | ||
| 7974 | RSSH | RILEY-SHERMA | SCAC4 | ||
| 7975 | RSSI | ROSES STORES NC | SCAC3 | ||
| 7976 | RSSJ | RTJ SPECIALIZED SERVICES | SCAC4 | ||
| 7977 | RSSK | ROSS, KENNETH TRUCKING | SCAC3 | ||
| 7978 | RSSK | RAMOS SEVEN SEVEN SEVEN (777) TRUCK | SCAC4 | ||
| 7979 | RSSL | ROSSEE OIL CO INC | SCAC4 | ||
| 7980 | RSSM | ROSS STEEL & TRANSPORTATION INC | SCAC3 | ||
| 7981 | RSSN | ROUSSEAU METAL INC | SCAC4 | ||
| 7982 | RSSO | R & S STORES INC, | SCAC3 | ||
| 7983 | RSSP | REDDING SEED AND SUPPLY INC | SCAC3 | ||
| 7984 | RSSQ | RS SHIPPING SRL | SCAC4 | ||
| 7985 | RSSR | ROSSI TRANSPORTATION COMPANY | SCAC3 | ||
| 7986 | RSSR | RESSLER, ROY & SON INC | SCAC4 | ||
| 7987 | RSSS | ROSSMANN SHIPPING SERVICES | SCAC3 | ||
| 7988 | RSST | ROSS TRUCKING COMPANY | SCAC3 | ||
| 7989 | RSSU | ROYAL WOLF TRADING AUSTRALIA PTY LT | SCAC4 | ||
| 7990 | RSSV | RUMFORD SHUTTLE SERVICE | SCAC3 | ||
| 7991 | RSSW | RAY SEA SA | SCAC4 | ||
| 7992 | RSSX | Railserve, Inc. | 7/2005 (not listed) | NAKINA | |
| 7993 | RSSX | *RAIL SWITCHING SERVICE, INC. | PWRC | ||
| 7994 | RSSX | +RAILSERVE, INC. | PWRC | ||
| 7995 | RSSX | Railserve Inc. | RSRV | ||
| 7996 | RSSX | RAILSERVE INC | SCAC4 | ||
| 7997 | RSSY | RGL SPECIALTY SERVICES LLC | SCAC4 | ||
| 7998 | RST | Resort Air | ICAO1 | ||
| 7999 | RST | Rangier-, Servce- und Transportgesellschaft mbH | St. Ingbert | D | privat-bahn.de |
| 8000 | RSTA | ROSSI TRANSPORT SERVICE, INC. | SCAC3 |