| 1 | RAT | Ratioflug Luftfahfitunternehmen GmbH | | D | AVCODES |
| 2 | RAT | Chief Rat Flight Services (PTY) Ltd. | Callsign: Riverrat, | ZA | AVCODES |
| 3 | RAT | Rainbow Airlines (Private) Limited | IATA: RT, Callsign: Raindrop, Planned to commence operation on 25 January 2017. | ZW | AVCODES |
| 4 | RAT | Chief Rat Flight Services | | | ICAO1 |
| 5 | RAT | | City: Craiova | RO | TRAFFIC |
| 6 | RAT | Rent A Train GmbH | | DE | VKM |
| 7 | RATA | RAPID TRANSIT INC | | | SCAC3 |
| 8 | RATB | RATLIFF BROS AND CO | | | SCAC3 |
| 9 | RATB | ROADSIDE AUTO & TRUCK TRANSPORT INC | | | SCAC4 |
| 10 | RATB | Regia Autonomă de Transport București | City: Bucharest | RO | TRAFFIC |
| 11 | RATC | RATA ASSOCIATES INC | | | SCAC3 |
| 12 | RATC | R & A TRUCKING INC | | | SCAC4 |
| 13 | RATC | Royal Army Transport Corps | | | TRAFFIC |
| 14 | RATD | RAMPANT DEVELOPMENT CORPORATION | | | SCAC3 |
| 15 | RATD | RATD INC | | | SCAC4 |
| 16 | RATE | RAIL-TRAIL CO | | | SCAC3 |
| 17 | RATE | RATEP RENOVATIONS INC | | | SCAC4 |
| 18 | RATF | ROULOTTES ACADIE TRAILERS INC | | | SCAC4 |
| 19 | RATG | RAYNORS TRUCKING INC | | | SCAC3 |
| 20 | RATH | R & A TRANSPORT | | | SCAC4 |
| 21 | RATI | RAPID AIR TRUCK INC | | | SCAC3 |
| 22 | RATI | RITAS ABSOLUTE TRUCKING INC | | | SCAC4 |
| 23 | RATK | RANGER TRUCK INC | | | SCAC3 |
| 24 | RATK | RAT | | | SCAC4 |
| 25 | RATL | RAMUS TRUCKING LINE INC | | | PWRC |
| 26 | RATL | RAMUS TRUCKING LINE, INC | | | SCAC3 |
| 27 | RATL | R & A TRANSPORTATION LOGISTICS | | | SCAC4 |
| 28 | RATM | RATLEYS MOBILE HOME SALES | | | SCAC3 |
| 29 | RATM | R A TRANSPORT INC | | | SCAC4 |
| 30 | RATN | RATLIFF TRUCKING CORPORATION INC | | | SCAC3 |
| 31 | RATN | ROBINSON AUTO TRANSPORT LLC | | | SCAC4 |
| 32 | RATO | R A TRANSPORT LLC | | | SCAC4 |
| 33 | RATP | RAYS TRANSPORTATION INC | | | SCAC3 |
| 34 | RATP | R A TRANSPORT INC | | | SCAC4 |
| 35 | RATP | Régie Autonome des Transports Parisiens | | FR | VKM |
| 36 | RATQ | RATCLIFF TRUCKING SERVICE | | | SCAC3 |
| 37 | RATR | R A TRANSPORTATION SERVICE LLC | | | SCAC4 |
| 38 | RATS | R A TRANSPORT INC | | | SCAC4 |
| 39 | RATT | Regia Autonomă de Transport Timişoara | City: Timisoara | RO | TRAFFIC |
| 40 | RATU | Royal Atlantic | | | RSRV |
| 41 | RATU | ARMSTRONG (TRANSPORT) | | | SCAC3 |
| 42 | RATU | ROYAL ATLANTIC LLC | | | SCAC4 |
| 43 | RATUC | Regia Autonomă de Transport Urban de Călători | City: Cluj, - 2013 | RO | TRAFFIC |
| 44 | RATV | RATAL TRAVEL & TOURS | | | SCAC3 |
| 45 | RATW | R & A TRANSPORT INC | | | SCAC4 |
| 46 | RATX | RailTex Service Co., Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 47 | RATX | RailTex Service Co., Inc. | Jul-00 | | NRHS |
| 48 | RATX | RAILTEX SERVICE CO. | | | PWRC |
| 49 | RATX | RailTex Service | | | RSRV |
| 50 | RATX | RAILTEX SERVICE CO INC | | | SCAC4 |
| 51 | RATY | R & A TRUCKING LLC | | | SCAC4 |
