| 1 | RB | Syrian Arab Airlines | ICAO: SYR, Callsign: Syrianair, IATA Prefix: 070, | SYR | AVCODES |
| 2 | RB | Rigibahnen | | CH | TRAFFIC |
| 3 | RB | Rigi-Bahnen AG | | CH | VKM |
| 4 | RBA | Royal Brunei Airlines Sdn. Bhd. | IATA: BI, Callsign: Brunei, IATA Prefix: 672, | BRU | AVCODES |
| 5 | RBA | Royal Brunei Airlines | IATA: BI | | ICAO1 |
| 6 | RBA | Regionalbus Augsburg GmbH | | D | TRAFFIC |
| 7 | RBAE | REBEL AIR EXPRESS | | | SCAC3 |
| 8 | RBAF | ROBERTS AIR FREIGHT | | | SCAC3 |
| 9 | RBAG | RO/BAG TRANSPORTATION INC | | | SCAC3 |
| 10 | RBAHN | Regiobahn ErlebnisZug GmbH | | A | TRAFFIC |
| 11 | RBAI | ROBAL LOGISTICS INC | | | SCAC3 |
| 12 | RBAI | R & B TRANSPORT | | | SCAC4 |
| 13 | RBAI | Royal Brunei Airlines | Real: BI / RBA | BRU | TRAFFIC |
| 14 | RBAK | ROBERTA TRUCKING CO INC | | | SCAC3 |
| 15 | RBAL | RED BALL INC | | | SCAC3 |
| 16 | RBAL | RBA LOGISTICS INC | | | SCAC4 |
| 17 | RBAN | ROBINSON, ALLEN E | | | SCAC3 |
| 18 | RBAO | RBA TRANSPORTATION SERVICES | | | SCAC3 |
| 19 | RBAP | RELIABLE TRANSPORTATION ASSOCIATES | | | SCAC3 |
| 20 | RBAS | ROBINSON, ART & SONS | | | SCAC3 |
| 21 | RBAT | RELIABLE AUTO TRANSPORT | | | SCAC3 |
| 22 | RBAU | RABANCO COMPANIES | | | SCAC4 |
| 23 | RBAU | Reisse-Bau GmbH | | DE | VKM |
| 24 | RBAV | ROBCHART BV | | | SCAC4 |
| 25 | RBAW | ROBL, A W TRANSPORT | | | SCAC3 |
| 26 | RBAZ | (REAZ) RETIRED 04-06-93 ATP (ACI 2395) | | | PWRC |
| 27 | RBB | Rabbit-Air AG | Callsign: Rabbit, Ceased operation. | CH | AVCODES |
| 28 | RBB | Rabbit-Air | | | ICAO1 |
| 29 | RBB | Regiobahn Bitterfeld GmbH | Bitterfeld (Connex-Gruppe > Veolia Verkehr > Captrain) | D | privat-bahn.de |
| 30 | RBB | BNSF [BURLINGTON NORTHERN RAILROAD CO.] | | | PWRC |
| 31 | RBB | Regiobahn Bitterfeld-Berlin GmbH | | D | TRAFFIC |
| 32 | RBB | Regiobahn Bitterfeld | | DE | VKM |
| 33 | RBBC | RABBIT TRUCKING CORP | | | SCAC3 |
| 34 | RBBC | RIVER BEND BROKERAGE CO | | | SCAC4 |
| 35 | RBBE | RIBBE, DANIEL L TRUCKING | | | SCAC3 |
| 36 | RBBF | ROBBINS FLEISING FORWARDING INC | | | SCAC3 |
| 37 | RBBH | RV BOAT AND BIKE TRANSPORT LLC | | | SCAC4 |
| 38 | RBBI | ROBBINS TRUCKING INC | | | SCAC3 |
| 39 | RBBI | ROBBINS, JEFF | | | SCAC4 |
| 40 | RBBK | R B & B TRUCKING INC | | | SCAC3 |
| 41 | RBBL | ROBERTS, B L | | | SCAC4 |
| 42 | RBBN | BNSF Ry. Co. | added 4/2005; 7/2005 | | NAKINA |
| 43 | RBBN | Burlington Northern R.R. Co. | added 7/1981; 1/1994; eliminated 4/2005 | | NAKINA |
| 44 | RBBN | Burlington Northern Inc. | 1/1980; eliminated 7/1981 | | NAKINA |
| 45 | RBBN | Burlington Northern R.R. Co. | added 4/1975 | | NAKINA |
| 46 | RBBN | Burlington Northern R.R. Co. | added 4/75 | | NRHS |
| 47 | RBBN | Burlington Northern Inc. | 1/80; eliminated 7/81 | | NRHS |
| 48 | RBBN | Burlington Northern R.R. Co. | added 7/81; 1/94 | | NRHS |
| 49 | RBBN | BNSF [BURLINGTON NORTHERN RAILROAD CO.] | | | PWRC |
| 50 | RBBN | Chicago, Burlington and Quincy Railroad (BNSF Railway) | | | RSRV |
| 51 | RBBO | R B TRUCKING | | | SCAC3 |
| 52 | RBBP | RILEYS B & B EXPRESS INC | | | SCAC3 |
| 53 | RBBQ | BNSF Ry. Co. | added 4/2005; 7/2005 | | NAKINA |
| 54 | RBBQ | Burlington Northern R.R. Co. | added 7/1981; 1/1994; eliminated 4/2005 | | NAKINA |
| 55 | RBBQ | Burlington Northern Inc. | 1/1975-1/1980; eliminated 7/1981 | | NAKINA |
| 56 | RBBQ | Chicago, Burlington and Quincy R.R. (Burlington Northern) | 4/1970 | | NAKINA |
| 57 | RBBQ | Chicago, Burlington and Quincy R.R., Co. | 7/1965-10/1966 | | NAKINA |
| 58 | RBBQ | Chicago, Burlington and Quincy R.R., Co. | 7/65-10/66 | | NRHS |
| 59 | RBBQ | Chicago, Burlington and Quincy R.R. (Burlington Northern) | Apr-70 | | NRHS |
| 60 | RBBQ | Burlington Northern Inc. | 1/75-1/80; eliminated 7/81 | | NRHS |
| 61 | RBBQ | Burlington Northern R.R. Co. | added 7/81; 1/94 | | NRHS |
| 62 | RBBQ | BNSF [BURLINGTON NORTHERN RAILROAD CO.; CHICAGO, BURLINGTON & QUINCEY RR CO.] | | | PWRC |
| 63 | RBBQ | Chicago, Burlington and Quincy Railroad (BNSF Railway) | | | RSRV |
| 64 | RBBR | RUBBER DUCKLING INC | | | SCAC4 |
| 65 | RBBR | Regionalbus Braunschweig GmbH | Real: RBB | D | TRAFFIC |
| 66 | RBBS | ROBBINS EXPRESS INC | | | SCAC3 |
| 67 | RBBS | ROBBINS OIL CO | | | SCAC4 |
| 68 | RBBT | REED, BILLY TRUCKING | | | SCAC4 |
| 69 | RBBU | BESED LLC | | RUS | BIC |
| 70 | RBBW | BNSF [BURLINGTON NORTHERN RAILROAD CO.] | | | PWRC |
| 71 | RBBW | ROERD BRAREN BEREEDERUNGS GMBH & CO | | | SCAC4 |
| 72 | RBBX | Ringling Bros. and Barnum & Bailey | 7/2000-7/2005 (not listed) | | NAKINA |
| 73 | RBBX | Western Fruit Express Co. | added 10/1970; 1/1975-1/1980; eliminated 4/1980; 1/1994 (not listed) | | NAKINA |
| 74 | RBBX | Burlington Refrigerator Express Co. | added 4/1957; 10/1957-4/1970; eliminated 10/1970 | | NAKINA |
| 75 | RBBX | Burlington Refrigerator Express Co. | added 4/57; 10/57-4/70; eliminated 10/70 | | NRHS |
| 76 | RBBX | Western Fruit Express Co. | added 10/70; 1/75-1/80; eliminated 4/80; 1/94 | | NRHS |
| 77 | RBBX | Ringling Bros. and Barnum & Bailey | Jul-00 | | NRHS |
| 78 | RBBX | *(BN) RETIRED 08-30-93 ATP [WESTERN FRUIT EXPRESS CO.; BURLINGTON REFRIGERATOR EXPRESS] | | | PWRC |
| 79 | RBBX | +RINGLING BROS. AND BARNUM AND BAILEY | | | PWRC |
| 80 | RBBX | Ringling Brothers and Barnum and Bailey Circus | | | RSRV |
| 81 | RBBX | RINGLING BROS. AND BARNUM & BAILEY | | | SCAC4 |
| 82 | RBBX | Ringling Bros. Barnum & Bailey | Circus trains | USA | TRAFFIC |
| 83 | RBBY | ROBB, TERRY CARTAGE COMPANY INC | | | SCAC3 |
| 84 | RBC | Republicair, S.A. de C.V. | Callsign: Republicair, | MEX | AVCODES |
| 85 | RBC | Republicair | | | ICAO1 |
| 86 | RBC | READY BUS LINE COMPANY | | | SCAC4 |
| 87 | RBCA | RED BUD OIL COMPANY | | | SCAC4 |
| 88 | RBCE | RIBCO ENTERPRISES | | | SCAC3 |
| 89 | RBCG | ROBINS CARTAGE | | | SCAC3 |
| 90 | RBCG | ROBINSON, C H WORLDWIDE (CONSOLIDAT | | | SCAC4 |
| 91 | RBCH | RABIDIS, CHRIS | | | SCAC3 |
| 92 | RBCI | ROBERTS CONSOLIDATED INDUSTRIES INC | | | SCAC3 |
| 93 | RBCJ | RIVER BEND CARRIERS INC | | | SCAC4 |
| 94 | RBCK | ROBERSON TRUCKING CO | | | SCAC3 |
| 95 | RBCL | ROBINSON, C H WORLDWIDE (CONSOLIDAT | | | SCAC4 |
| 96 | RBCM | RANKIN BIOMEDICAL CORP | | | SCAC4 |
| 97 | RBCN | R B TRUCKING | | | SCAC4 |
| 98 | RBCO | RABCO TRUCKING | | | SCAC4 |
| 99 | RBCP | RBC TRANSPORT LLC | | | SCAC4 |
| 100 | RBCQ | REMORQUAGE BURSTALL CONRAD INC | | | SCAC4 |
