| 8001 | RRLI | R & R LIMOUSINE INC | | | SCAC3 |
| 8002 | RRLO | R & R LOGGING INC | | | SCAC3 |
| 8003 | RRLQ | ROYAL ROSE LOGISTICS INC | | | SCAC4 |
| 8004 | RRLR | RAMSEY, RAYMOND LEROY | | | SCAC3 |
| 8005 | RRLR | R & R LOGISTICS INC | | | SCAC4 |
| 8006 | RRLR | Regiorail SAS | | FR | VKM |
| 8007 | RRLS | ROSSITER RELOCATION SERVICES INC | | | SCAC4 |
| 8008 | RRLT | ROMRELL TRUCKING INC | | | SCAC3 |
| 8009 | RRLT | ROAD RUNNER LOGISTICS INC | | | SCAC4 |
| 8010 | RRLU | RABANCO COMPANIES | | | SCAC4 |
| 8011 | RRLV | RIVER RUN LOGISITICS | | | SCAC4 |
| 8012 | RRLX | Rail Logistics, LC | added 10/2004; 7/2005 | | NAKINA |
| 8013 | RRLX | *RAILROAD RESOURCES INC. | | | PWRC |
| 8014 | RRLX | +RAIL LOGISTICS, LC | | | PWRC |
| 8015 | RRLX | Railroad Resources | | | RSRV |
| 8016 | RRLX | RAIL LOGISTICS LC | | | SCAC4 |
| 8017 | RRLY | ROBERTSON RACING LLC | | | SCAC4 |
| 8018 | RRM | Acvila Air | Callsign: Air Romania, Ceased operations on 30 April 2006. Designator WZ recalled by IATA | RO | AVCODES |
| 8019 | RRM | Acvila Air-Romanian Carrier | | | ICAO1 |
| 8020 | RRMC | R & R MOTOR COACH INC | | | SCAC3 |
| 8021 | RRMC | ROMAN, R TRANSPORT INC | | | SCAC4 |
| 8022 | RRMH | R & R MOBILE HOME TRANSPORT | | | SCAC3 |
| 8023 | RRMI | RROYCE MOVERS INC | | | SCAC3 |
| 8024 | RRMQ | RRM TRANSPORTATION INCORPORATED | | | SCAC4 |
| 8025 | RRMR | RODRIMAR INTERNATIONAL FREIGHT INC | | | SCAC4 |
| 8026 | RRMS | ROADRUNNER MOVING & STORAGE | | | SCAC4 |
| 8027 | RRMT | ROAD RUNNER MOBILE HOME TRANSPORT | | | SCAC3 |
| 8028 | RRMT | RYDING REGENCY MEAT PAKCERS LTD | | | SCAC4 |
| 8029 | RRMU | REMAIN GMBH CONTAINER DEPOT AND REPAIR | | D | BIC |
| 8030 | RRMU | REMAIN GMBH CONTAINER-DEPOT AND REP | | | SCAC4 |
| 8031 | RRMX | RRM Properties Ltd., a California Limited Partnership | 7/2005 (not listed) | | NAKINA |
| 8032 | RRMX | RRM PROPERTIES LTD., CALIFORNIA LP | | | PWRC |
| 8033 | RRMX | RRM Properties | | | RSRV |
| 8034 | RRMX | RRM PROPERTIES LTD A CALIFORNIA LIM | | | SCAC4 |
| 8035 | RRN | Ararat International Airline LLC | Callsign: Ararat Airline, Founded in 2010. Ceased operations during 2013. | AM | AVCODES |
| 8036 | RRNB | ROADRUNNER BUS LINES INC | | | SCAC3 |
| 8037 | RRND | ROAD RUNNER DRIVEAWAY LLC | | | SCAC4 |
| 8038 | RRNE | RIDGE RUNNER EXPRESS | | | SCAC3 |
| 8039 | RRNI | RANEY & RANEY INC | | | SCAC3 |
| 8040 | RRNL | RNL RENTAL NETWORK LTD | | | SCAC4 |
| 8041 | RRNN | ROAD RUNNER TRANSPORTATION INC | | | SCAC4 |
| 8042 | RRNP | ROAD RUNNER TRANSPORTATION LLC | | | SCAC4 |
| 8043 | RRNT | ROADRUNNER TRANSPORTATION INC | | | SCAC3 |
| 8044 | RRNT | R & R TRANSPORTATIONINC | | | SCAC4 |
| 8045 | RRO | Aerocredo, Closed Corporation | | RUS | AVCODES |
| 8046 | RROA | RIGEL REEDEREI GMBH & CO KG | | | SCAC4 |
| 8047 | RROB | RICE, ROBERT | | | SCAC4 |
| 8048 | RROD | RAMROD MOVING AND STORAGE | | | SCAC3 |
| 8049 | RROG | RODRIGUEZ, GILBERTO ROSA TRANSPORT | | | SCAC3 |
| 8050 | RROK | R R O TRUCKING CO | | | SCAC4 |
| 8051 | RROL | RAILROLL INC | | | SCAC3 |
| 8052 | RROX | RROX, LTD. | | | PWRC |
| 8053 | RROX | RROX LTD | | | SCAC4 |
| 8054 | RROY | RENNER, ROY TRUCKING | | | SCAC3 |
| 8055 | RROY | Rolls Royce | | | TRAFFIC |
| 8056 | RRP | *RAILROAD PASSENGER CAR SERVICE | | | PWRC |
| 8057 | RRP | *RETIRED 05-15-92 ATP (0938) | | | PWRC |
| 8058 | RRP | Railroad Passenger Cars Service | | USA | TRAFFIC |
| 8059 | RRPC | R & R TRANSPORT INC | | | SCAC3 |
| 8060 | RRPD | RANSOM, ROBERT PRODUCE | | | SCAC3 |
| 8061 | RRPD | R & R PICK-UP & | | | SCAC4 |
| 8062 | RRPG | R & R PACKAGING INC | | | SCAC4 |
| 8063 | RRPI | R & R PHILLIPS TRUCKING | | | SCAC3 |
| 8064 | RRPI | ROY, RICK PRODUCTS INC | | | SCAC4 |
| 8065 | RRPJ | R & R PLASTIC INJECTION CONSULTANTS | | | SCAC4 |
| 8066 | RRPL | R & R PLUS INC | | | SCAC4 |
| 8067 | RRPN | R & R TRANSPORTATION INC | | | SCAC3 |
| 8068 | RRPO | R & R PALLET OF GARDEN CITY INC | | | SCAC4 |
| 8069 | RRPQ | R & R PRODUCE INC | | | SCAC4 |
| 8070 | RRPR | RAYMOND ENTERPRISES SA | | | SCAC4 |
| 8071 | RRPT | R & R TRANSPORTATION | | | SCAC3 |
| 8072 | RRPT | R & R TRANSPORTATION INC | | | SCAC4 |
| 8073 | RRPU | RESPOL RESINAS S.A. | | P | BIC |
| 8074 | RRPX | RR Power Leasing LLC | added 10/2003; eliminated 1/2004; 7/2005 (not listed) | | NAKINA |
| 8075 | RRPX | Ranger Refining & Pipe Line Co. | 8/1920-7/1923 | | NAKINA |
| 8076 | RRPX | *RANGER REFINING & PIPE LINE CO. | | | PWRC |
| 8077 | RRPX | +RR POWER LEASING LLC | | | PWRC |
| 8078 | RRPX | Railroad Power Leasing | | | RSRV |
| 8079 | RRPX | RR POWER LEASING LLC | | | SCAC4 |
| 8080 | RRPX | Rail Road Power Leasing | | USA | TRAFFIC |
| 8081 | RRPY | RIOUX, RUDY P | | | SCAC4 |
| 8082 | RRQC | RED RIVER LOGISTICS LLC | | | SCAC4 |
| 8083 | RRQS | R & R LOGISTIC SERVICE LLC | | | SCAC4 |
| 8084 | RRR | RAF-HQSTC (Air Transport) | Callsign: Ascot/Kittyhawk, | GB | AVCODES |
| 8085 | RRR | Royal Air Force | | | ICAO1 |
| 8086 | RRRA | REGION RAIL REORG ACT (1973) TARIFF | | | SCAC3 |
| 8087 | RRRC | RAIL ROAD RUNNER CONTAINER | | | SCAC4 |
| 8088 | RRRE | RRR RECYCLING SERVICES HAWAII | | | SCAC4 |
| 8089 | RRRF | R & R REFRIGERATED TRANSPORT | | | SCAC3 |
| 8090 | RRRG | REMORQUAGE REAL GRAND MAISON | | | SCAC4 |
| 8091 | RRRI | R & R TRUCKING | | | SCAC4 |
| 8092 | RRRK | R & R TRANSPORTATION INC | | | SCAC4 |
| 8093 | RRRO | RAINBOW MOVERS INC | | | SCAC4 |
| 8094 | RRRP | RRR TRANSPORTATION INC | | | SCAC3 |
| 8095 | RRRP | RRR TRANSPORTATION INC | | | SCAC4 |
| 8096 | RRRR | Rock & Rail, Inc. | 7/2000-7/2005 | | NAKINA |
| 8097 | RRRR | Rock & Rail, Inc. | Jul-00 | | NRHS |
| 8098 | RRRR | ROCK & RAIL INCORPORATED | | | PWRC |
| 8099 | RRRR | Rock & Rail Inc. | | | RSRV |
| 8100 | RRRR | ROCK & RAIL INC | | | SCAC4 |
