| 901 | RBK | Reginalbahn Kassel | D | TRAFFIC | |
| 902 | RBK | Regionalbahn Kassel GmbH | DE | VKM | |
| 903 | RBKB | R B KIRKCONNELL BROS LTD | PWRC | ||
| 904 | RBKB | READS-BROOKS RED BALL INC | SCAC4 | ||
| 905 | RBKC | RAVENNA BULK CARRIERS INC. | SCAC3 | ||
| 906 | RBKC | RBK CONSTRUCTION INC | SCAC4 | ||
| 907 | RBKD | ROBERTS, KEITH TRUCKING LTD | SCAC4 | ||
| 908 | RBKF | RIVERBROOK FARMS INC | SCAC4 | ||
| 909 | RBKG | ROBERTS TRUCKING | SCAC3 | ||
| 910 | RBKG | REBAK BROKERAGE LLC | SCAC4 | ||
| 911 | RBKI | REVELLE, BILL TRUCKING INC | SCAC3 | ||
| 912 | RBKN | ROBERTS & SONS TRUCKING INC | SCAC3 | ||
| 913 | RBKN | R B K TRUCKING INC | SCAC4 | ||
| 914 | RBKR | RED BANK RAILROAD COMPANY (PITTSBURG & SHAWMUT RAILROAD CO.) | PWRC | ||
| 915 | RBKR | RED BANK RAILROAD COMPANY | SCAC3 | ||
| 916 | RBKT | ROGERS, BUCK TRAVEL SERVICE INC | SCAC3 | ||
| 917 | RBKU | RABANCO COMPANIES | SCAC4 | ||
| 918 | RBKX | Red Bank R.R. Co. | 1/1994 | NAKINA | |
| 919 | RBKX | Red Bank R.R. Co. | Jan-94 | NRHS | |
| 920 | RBKX | RED BANK RAILROAD CO. | PWRC | ||
| 921 | RBKY | ROBERTSON TRUCKING | SCAC4 | ||
| 922 | RBLA | RELIABLE TRAILER INC | SCAC4 | ||
| 923 | RBLC | RELIABLE CARRIERS INC | SCAC3 | ||
| 924 | RBLC | RELIABLE CARRIERS INC | SCAC4 | ||
| 925 | RBLD | RELIABLE DELIVERIES INC | SCAC3 | ||
| 926 | RBLD | RBL INC | SCAC4 | ||
| 927 | RBLE | ROBLES TRUCKING QUALITY SERVICE INC | SCAC4 | ||
| 928 | RBLG | R & B LEASING CO | SCAC3 | ||
| 929 | RBLH | RELIABLE HOLDINGS INC | SCAC3 | ||
| 930 | RBLI | R B L INC | SCAC3 | ||
| 931 | RBLI | RANGI BROTHERS LOGISTIC INC | SCAC4 | ||
| 932 | RBLJ | REBEL TRUCKING | SCAC3 | ||
| 933 | RBLJ | RB LOGISTICS | SCAC4 | ||
| 934 | RBLL | RELIABLE LOGISTICS LLC | SCAC4 | ||
| 935 | RBLM | ROBINSON LUMBER CO | SCAC4 | ||
| 936 | RBLN | ROWAN BUS LINES | SCAC3 | ||
| 937 | RBLN | REBEL TRANSPORTATION INC | SCAC4 | ||
| 938 | RBLO | ROBELLO AND SONS TRANSPORTATION | SCAC3 | ||
| 939 | RBLP | REBEL TRANSPORTATION | SCAC3 | ||
| 940 | RBLP | ROBERTS LANDSCAPING COMPANY INC | SCAC4 | ||
| 941 | RBLQ | RELIABLE AUTO TRANSPORT | SCAC3 | ||
| 942 | RBLR | ROBINSON, LEROY G | SCAC3 | ||
| 943 | RBLS | ROBLES, ED TRUCKING | SCAC3 | ||
| 944 | RBLT | ROBINSON, C H WORLDWIDE (LTL DIVISI | SCAC4 | ||
| 945 | RBLUE | Royal Blue Coach Services | GB | TRAFFIC | |
| 946 | RBLV | RED BALL VAN LINES INC | SCAC3 | ||
| 947 | RBLW | R B L WISCONSIN INC | SCAC3 | ||
| 948 | RBLW | ROBERTS BROS LUMBER CO INC | SCAC4 | ||
| 949 | RBLX | Brent C. Lewis | 7/2000-7/2005 (not listed) | NAKINA | |
| 950 | RBLX | Brent C. Lewis | Jul-00 | NRHS | |
| 951 | RBLX | BRENT C. LEWIS | PWRC | ||
| 952 | RBLX | Brent C. Lewis | RSRV | ||
| 953 | RBLX | BRENT C LEWIS | SCAC4 | ||
| 954 | RBLY | RAYLIN BUS LINES | SCAC3 | ||
| 955 | RBLY | ROBLES TRUCKING | SCAC4 | ||
| 956 | RBM | City: Merseburg | D | TRAFFIC | |
| 957 | RBMB | R B T LIMITED | SCAC4 | ||
| 958 | RBMC | ROBINSON MOTORCYCLE LTD | SCAC4 | ||
| 959 | RBMD | ROBERTS, MARK D | SCAC3 | ||
| 960 | RBMD | ROBINSON MAPLE PRODUCTS | SCAC4 | ||
| 961 | RBMF | RED BALL MOTOR FREIGHT INC | PWRC | ||
| 962 | RBMF | RED BALL MOTOR FREIGHT INC | SCAC3 | ||
| 963 | RBMG | RED BALL MOVING & STORAGE LLC | SCAC4 | ||
| 964 | RBMI | RUBYMAR LIMITED | SCAC4 | ||
| 965 | RBML | RAINBOW MOTOR LINES | SCAC3 | ||
| 966 | RBML | RBM HOLD SOLUTIONS | SCAC4 | ||
| 967 | RBMN | Reading Blue Mountain & Northern R.R. Co. | 1/1994; added 4/2000; 7/2000; eliminated 7/2000; 7/2005; added 1/2009; eliminated 4/2009 | NAKINA | |
| 968 | RBMN | Reading Blue Mountain & Northern R.R. Co. | 1/94; added 4/2000; 7/2000; eliminated 7/2000 | NRHS | |
| 969 | RBMN | READING BLUE MOUNTAIN & NORTHERN RAILROAD COMPANY | PWRC | ||
| 970 | RBMN | Reading Blue Mountain and Northern Railroad | RSRV | ||
| 971 | RBMN | READING BLUE MOUNTAIN & NORTHERN RA | SCAC3 | ||
| 972 | RBMN | READING BLUE MOUNTAIN & NORTHERN RA | SCAC4 | ||
| 973 | RBMN | Reading Blue Mountain & Northern Railroad Company | USA | TRAFFIC | |
| 974 | RBMO | R B S INC | SCAC3 | ||
| 975 | RBMO | R B S INC | SCAC4 | ||
| 976 | RBMQ | RED BALL MOVING AND STORAGE OF | SCAC4 | ||
| 977 | RBMR | RBM REFRIGERATED DISTRIBUTION COMPA | SCAC3 | ||
| 978 | RBMR | RUBY MARINE INCORPORATED | SCAC4 | ||
| 979 | RBMS | ROSSI BROS MOTOR SERVICE, INC | SCAC3 | ||
| 980 | RBMS | RBM CARRIERS INC | SCAC4 | ||
| 981 | RBMT | RBM TRUCKING | SCAC4 | ||
| 982 | RBMU | BOURGEY MONTREUIL ROUTE | SCAC3 | ||
| 983 | RBMV | ROBERSON MOVING & STORAGE | SCAC3 | ||
| 984 | RBMV | REIMER BUILDING MOVERS | SCAC4 | ||
| 985 | RBN | Red Baron Aviation | ICAO1 | ||
| 986 | RBNB | RUBIN, BEN EXPRESS | SCAC3 | ||
| 987 | RBNC | ROBIN CARTAGE INC | SCAC3 | ||
| 988 | RBND | ROBINSONS DELIVERY SERVICE INC | SCAC3 | ||
| 989 | RBND | ROBINSONS DELIVERY SERVICE INC | SCAC4 | ||
| 990 | RBNE | ROBIN EXPRESS INC | SCAC3 | ||
| 991 | RBNE | ROBIN EXPRESS INC | SCAC4 | ||
| 992 | RBNG | R B & G CO INC | SCAC3 | ||
| 993 | RBNI | ROBINSON, DALE TRUCKING INC | SCAC3 | ||
| 994 | RBNJ | ROBINS, JONATHAN B TRANSPORT CO INC | SCAC3 | ||
| 995 | RBNK | ROBINSON TRUCKING | SCAC3 | ||
| 996 | RBNM | ROBINSONS MELROSE EXPRESS | SCAC3 | ||
| 997 | RBNO | ROBINSON TRANSFER | SCAC3 | ||
| 998 | RBNO | ROBINSON TRANSFER INC | SCAC4 | ||
| 999 | RBNP | ROBINSON TRANSPORT INC | SCAC3 | ||
| 1000 | RBNP | ROBINSON TRANSPORT INC | SCAC4 |