| 1 | RB | Rigibahnen | CH | TRAFFIC | |
| 2 | RB | Rigi-Bahnen AG | CH | VKM | |
| 3 | RBA | Royal Brunei Airlines | IATA: BI | ICAO1 | |
| 4 | RBA | Regionalbus Augsburg GmbH | D | TRAFFIC | |
| 5 | RBAE | REBEL AIR EXPRESS | SCAC3 | ||
| 6 | RBAF | ROBERTS AIR FREIGHT | SCAC3 | ||
| 7 | RBAG | RO/BAG TRANSPORTATION INC | SCAC3 | ||
| 8 | RBAHN | Regiobahn ErlebnisZug GmbH | A | TRAFFIC | |
| 9 | RBAI | ROBAL LOGISTICS INC | SCAC3 | ||
| 10 | RBAI | R & B TRANSPORT | SCAC4 | ||
| 11 | RBAK | ROBERTA TRUCKING CO INC | SCAC3 | ||
| 12 | RBAL | RED BALL INC | SCAC3 | ||
| 13 | RBAL | RBA LOGISTICS INC | SCAC4 | ||
| 14 | RBAN | ROBINSON, ALLEN E | SCAC3 | ||
| 15 | RBAO | RBA TRANSPORTATION SERVICES | SCAC3 | ||
| 16 | RBAP | RELIABLE TRANSPORTATION ASSOCIATES | SCAC3 | ||
| 17 | RBAS | ROBINSON, ART & SONS | SCAC3 | ||
| 18 | RBAT | RELIABLE AUTO TRANSPORT | SCAC3 | ||
| 19 | RBAU | RABANCO COMPANIES | SCAC4 | ||
| 20 | RBAU | Reisse-Bau GmbH | DE | VKM | |
| 21 | RBAV | ROBCHART BV | SCAC4 | ||
| 22 | RBAW | ROBL, A W TRANSPORT | SCAC3 | ||
| 23 | RBAZ | (REAZ) RETIRED 04-06-93 ATP (ACI 2395) | PWRC | ||
| 24 | RBB | Rabbit-Air | ICAO1 | ||
| 25 | RBB | Regiobahn Bitterfeld GmbH | Bitterfeld (Connex-Gruppe > Veolia Verkehr > Captrain) | D | privat-bahn.de |
| 26 | RBB | BNSF [BURLINGTON NORTHERN RAILROAD CO.] | PWRC | ||
| 27 | RBB | Regiobahn Bitterfeld-Berlin GmbH | D | TRAFFIC | |
| 28 | RBB | Regiobahn Bitterfeld | DE | VKM | |
| 29 | RBBC | RABBIT TRUCKING CORP | SCAC3 | ||
| 30 | RBBC | RIVER BEND BROKERAGE CO | SCAC4 | ||
| 31 | RBBE | RIBBE, DANIEL L TRUCKING | SCAC3 | ||
| 32 | RBBF | ROBBINS FLEISING FORWARDING INC | SCAC3 | ||
| 33 | RBBH | RV BOAT AND BIKE TRANSPORT LLC | SCAC4 | ||
| 34 | RBBI | ROBBINS TRUCKING INC | SCAC3 | ||
| 35 | RBBI | ROBBINS, JEFF | SCAC4 | ||
| 36 | RBBK | R B & B TRUCKING INC | SCAC3 | ||
| 37 | RBBL | ROBERTS, B L | SCAC4 | ||
| 38 | RBBN | BNSF Ry. Co. | added 4/2005; 7/2005 | NAKINA | |
| 39 | RBBN | Burlington Northern R.R. Co. | added 7/1981; 1/1994; eliminated 4/2005 | NAKINA | |
| 40 | RBBN | Burlington Northern Inc. | 1/1980; eliminated 7/1981 | NAKINA | |
| 41 | RBBN | Burlington Northern R.R. Co. | added 4/1975 | NAKINA | |
| 42 | RBBN | Burlington Northern R.R. Co. | added 4/75 | NRHS | |
| 43 | RBBN | Burlington Northern Inc. | 1/80; eliminated 7/81 | NRHS | |
| 44 | RBBN | Burlington Northern R.R. Co. | added 7/81; 1/94 | NRHS | |
| 45 | RBBN | BNSF [BURLINGTON NORTHERN RAILROAD CO.] | PWRC | ||
| 46 | RBBN | Chicago, Burlington and Quincy Railroad (BNSF Railway) | RSRV | ||
| 47 | RBBO | R B TRUCKING | SCAC3 | ||
| 48 | RBBP | RILEYS B & B EXPRESS INC | SCAC3 | ||
| 49 | RBBQ | BNSF Ry. Co. | added 4/2005; 7/2005 | NAKINA | |
| 50 | RBBQ | Burlington Northern R.R. Co. | added 7/1981; 1/1994; eliminated 4/2005 | NAKINA | |
| 51 | RBBQ | Burlington Northern Inc. | 1/1975-1/1980; eliminated 7/1981 | NAKINA | |
| 52 | RBBQ | Chicago, Burlington and Quincy R.R. (Burlington Northern) | 4/1970 | NAKINA | |
| 53 | RBBQ | Chicago, Burlington and Quincy R.R., Co. | 7/1965-10/1966 | NAKINA | |
| 54 | RBBQ | Chicago, Burlington and Quincy R.R., Co. | 7/65-10/66 | NRHS | |
| 55 | RBBQ | Chicago, Burlington and Quincy R.R. (Burlington Northern) | Apr-70 | NRHS | |
| 56 | RBBQ | Burlington Northern Inc. | 1/75-1/80; eliminated 7/81 | NRHS | |
| 57 | RBBQ | Burlington Northern R.R. Co. | added 7/81; 1/94 | NRHS | |
| 58 | RBBQ | BNSF [BURLINGTON NORTHERN RAILROAD CO.; CHICAGO, BURLINGTON & QUINCEY RR CO.] | PWRC | ||
| 59 | RBBQ | Chicago, Burlington and Quincy Railroad (BNSF Railway) | RSRV | ||
| 60 | RBBR | RUBBER DUCKLING INC | SCAC4 | ||
| 61 | RBBR | Regionalbus Braunschweig GmbH | Real: RBB | D | TRAFFIC |
| 62 | RBBS | ROBBINS EXPRESS INC | SCAC3 | ||
| 63 | RBBS | ROBBINS OIL CO | SCAC4 | ||
| 64 | RBBT | REED, BILLY TRUCKING | SCAC4 | ||
| 65 | RBBW | BNSF [BURLINGTON NORTHERN RAILROAD CO.] | PWRC | ||
| 66 | RBBW | ROERD BRAREN BEREEDERUNGS GMBH & CO | SCAC4 | ||
| 67 | RBBX | Ringling Bros. and Barnum & Bailey | 7/2000-7/2005 (not listed) | NAKINA | |
| 68 | RBBX | Western Fruit Express Co. | added 10/1970; 1/1975-1/1980; eliminated 4/1980; 1/1994 (not listed) | NAKINA | |
| 69 | RBBX | Burlington Refrigerator Express Co. | added 4/1957; 10/1957-4/1970; eliminated 10/1970 | NAKINA | |
| 70 | RBBX | Burlington Refrigerator Express Co. | added 4/57; 10/57-4/70; eliminated 10/70 | NRHS | |
| 71 | RBBX | Western Fruit Express Co. | added 10/70; 1/75-1/80; eliminated 4/80; 1/94 | NRHS | |
| 72 | RBBX | Ringling Bros. and Barnum & Bailey | Jul-00 | NRHS | |
| 73 | RBBX | *(BN) RETIRED 08-30-93 ATP [WESTERN FRUIT EXPRESS CO.; BURLINGTON REFRIGERATOR EXPRESS] | PWRC | ||
| 74 | RBBX | +RINGLING BROS. AND BARNUM AND BAILEY | PWRC | ||
| 75 | RBBX | Ringling Brothers and Barnum and Bailey Circus | RSRV | ||
| 76 | RBBX | RINGLING BROS. AND BARNUM & BAILEY | SCAC4 | ||
| 77 | RBBX | Ringling Bros. Barnum & Bailey | Circus trains | USA | TRAFFIC |
| 78 | RBBY | ROBB, TERRY CARTAGE COMPANY INC | SCAC3 | ||
| 79 | RBC | Republicair | ICAO1 | ||
| 80 | RBC | READY BUS LINE COMPANY | SCAC4 | ||
| 81 | RBCA | RED BUD OIL COMPANY | SCAC4 | ||
| 82 | RBCE | RIBCO ENTERPRISES | SCAC3 | ||
| 83 | RBCG | ROBINS CARTAGE | SCAC3 | ||
| 84 | RBCG | ROBINSON, C H WORLDWIDE (CONSOLIDAT | SCAC4 | ||
| 85 | RBCH | RABIDIS, CHRIS | SCAC3 | ||
| 86 | RBCI | ROBERTS CONSOLIDATED INDUSTRIES INC | SCAC3 | ||
| 87 | RBCJ | RIVER BEND CARRIERS INC | SCAC4 | ||
| 88 | RBCK | ROBERSON TRUCKING CO | SCAC3 | ||
| 89 | RBCL | ROBINSON, C H WORLDWIDE (CONSOLIDAT | SCAC4 | ||
| 90 | RBCM | RANKIN BIOMEDICAL CORP | SCAC4 | ||
| 91 | RBCN | R B TRUCKING | SCAC4 | ||
| 92 | RBCO | RABCO TRUCKING | SCAC4 | ||
| 93 | RBCP | RBC TRANSPORT LLC | SCAC4 | ||
| 94 | RBCQ | REMORQUAGE BURSTALL CONRAD INC | SCAC4 | ||
| 95 | RBCR | R B CARRIERS INC | SCAC3 | ||
| 96 | RBCS | BNSF Ry. Co. | added 4/2005; 7/2005 | NAKINA | |
| 97 | RBCS | Burlington Northern R.R. Co. | added 4/1982; 1/1994; eliminated 4/2005 | NAKINA | |
| 98 | RBCS | The Colorado and Southern Ry. Co. | 1/1975-1/1980; eliminated 4/1982 | NAKINA | |
| 99 | RBCS | Colorado & Southern Ry. Co. | 4/1961-4/1970 | NAKINA | |
| 100 | RBCS | Colorado & Southern Ry. Co. | 4/61-4/70 | NRHS |