| 4601 | RINJ | RINCON, JORGE TRUCKING COMPANY INC | | | SCAC3 |
| 4602 | RINK | RINKER TRANSPORT INC | | | SCAC3 |
| 4603 | RINK | RINK-TEC INTERNATIONAL INC | | | SCAC4 |
| 4604 | RINN | RINN CORP | | | SCAC3 |
| 4605 | RINO | RINAUDO TRUCKING INC | | | SCAC3 |
| 4606 | RINO | RECTOR INTERNATIONAL | | | SCAC4 |
| 4607 | RINP | RINCHEM COMPANY INC, THE | | | SCAC3 |
| 4608 | RINQ | RINEHART, T & S | | | SCAC3 |
| 4609 | RINQ | R I NORTHWEST INC | | | SCAC4 |
| 4610 | RINR | RINE, RAMON | | | SCAC3 |
| 4611 | RINS | RITTER & SMITH TRUCKING INC | | | SCAC3 |
| 4612 | RINS | ROMTRANS INC | | | SCAC4 |
| 4613 | RINT | RINGER TRUCKING INC | | | SCAC3 |
| 4614 | RINU | HERMANN RINNEN JUNIOR | | D | BIC |
| 4615 | RINU | HERMANN RINNEN JR | | | SCAC4 |
| 4616 | RINV | ROSS INCINERATION SERVICES INC | | | SCAC3 |
| 4617 | RINV | ROSSI INC | | | SCAC4 |
| 4618 | RINW | RING, NEIL | | | SCAC3 |
| 4619 | RINW | ROHRER INCORPORATED | | | SCAC4 |
| 4620 | RINY | R-WAY INC | | | SCAC4 |
| 4621 | RIO | RIO Linhas Aereas Ltda. | IATA: R3, IATA Prefix: 970, Ceased operations during 2017. | BR | AVCODES |
| 4622 | RIOA | RIO STONE | | | SCAC4 |
| 4623 | RIOB | RIO BRAVO TRANSPORT INC | | | SCAC3 |
| 4624 | RIOB | RIO BRAVO TRUCKING SA DE CV | | | SCAC4 |
| 4625 | RIOC | Roosevelt Island Operationg Corp. | | USA | TRAFFIC |
| 4626 | RIOD | RIO TRANS | | | SCAC4 |
| 4627 | RIOG | RIO GRANDE EXPRESS FREIGHT INC | | | SCAC3 |
| 4628 | RIOG | RIO GRANDE CARTAGE CO | | | SCAC4 |
| 4629 | RIOI | RICHARD OIL AND FUEL LLC | | | SCAC4 |
| 4630 | RIOL | RIO LINDA MARINE | | | SCAC3 |
| 4631 | RIOM | RIOM CORPORATION | | | SCAC3 |
| 4632 | RIOM | RIOM CORPORATION | | | SCAC4 |
| 4633 | RION | RICE, OWEN F | | | SCAC3 |
| 4634 | RIOO | RITCHIE TRUCKING SERVICE, INC | | | SCAC3 |
| 4635 | RIOO | RITCHIE TRUCKING SERVICE | | | SCAC4 |
| 4636 | RIOP | RIOS, PAUL JR | | | SCAC3 |
| 4637 | RIOP | RIO TRANSPORT INC | | | SCAC4 |
| 4638 | RIOR | RIOMAR AGENCIES INC. | | | SCAC3 |
| 4639 | RIOR | RIOMAR AGENCIES INC. | | | SCAC4 |
| 4640 | RIOS | RIOS WOOD & COAL YARD | | | SCAC3 |
| 4641 | RIOS | RIOS, M TRUCKING | | | SCAC4 |
| 4642 | RIOT | RIO MARINE INC, | | | SCAC3 |
| 4643 | RIOV | RIOJAS VASQUEZ, DIANA ROMELIA, ROIO | | | SCAC4 |
| 4644 | RIOW | RIGHT-O-WAY TRANSPORTATION INC | | | SCAC3 |
| 4645 | RIP | Ilford-Riverton Airways Ltd | Callsign: Ilford, | CDN | AVCODES |
| 4646 | RIPA | RHODE ISLAND PUBLIC TRANSIT AUTHORI | | | SCAC3 |
| 4647 | RIPA | REFRIGERADOS INTERNACIONALES PARAIS | | | SCAC4 |
| 4648 | RIPD | RIPPE, DONALD W | | | SCAC3 |
| 4649 | RIPE | RIPPEE, D & S & SON TRUCKING | | | SCAC3 |
| 4650 | RIPH | RICHARD, PHILIPPE, LTD | | | SCAC3 |
| 4651 | RIPL | RINGSBY-PACIFIC LTD. | | | PWRC |
| 4652 | RIPM | R I P TRUCKING | | | SCAC3 |
| 4653 | RIPN | R I P TRANSPORTATION | | | SCAC3 |
| 4654 | RIPO | RIP-O-BEC INC | | | SCAC4 |
| 4655 | RIPP | RIPPEE, RICHARD | | | SCAC3 |
| 4656 | RIPR | RIVERSIDE PRODUCE INC | | | SCAC3 |
| 4657 | RIPTA | Rhode Island Public Transit Authority | | USA | TRAFFIC |
| 4658 | RIPX | Rochester Independent Packer, Inc. | added 7/1969; 4/1970-1/1980; eliminated 5/1983; 1/1994 (not listed) | | NAKINA |
| 4659 | RIPX | Rock Island Petroleum Co. | 8/1920 | | NAKINA |
| 4660 | RIPX | Rochester Independent Packer, Inc. | added 7/69; 4/70-1/80; eliminated 5/83; 1/94 | | NRHS |
| 4661 | RIPX | *ROCK ISLAND PETROLEUM CO. | | | PWRC |
| 4662 | RIPX | *ROCHESTER INDEPENDENT PACKER, INC. | | | PWRC |
| 4663 | RIPZ | ROANOKE INDUSTRIAL PARK | | | PWRC |
| 4664 | RIR | Ronnair Oy | Callsign: Ronnair, | FIN | AVCODES |
| 4665 | RIRA | RICHMOND, RAYMOND | | | SCAC3 |
| 4666 | RIRA | RILEY RACING LLC | | | SCAC4 |
| 4667 | RIRB | RINDAL, ROBERT | | | SCAC3 |
| 4668 | RIRB | RINDAL, ROBERT | | | SCAC4 |
| 4669 | RIRC | RINCON RECYCLING INC | | | SCAC4 |
| 4670 | RIRD | RICHARDS TRANSIT, INC | | | SCAC3 |
| 4671 | RIRG | RINGER, G & COMPANY INC | | | SCAC3 |
| 4672 | RIRI | RICH, R E TRUCKING CO | | | SCAC3 |
| 4673 | RIRL | RIVERA, RAUL TRUCKING | | | SCAC3 |
| 4674 | RIRN | RICKELMAN TRUCKING | | | SCAC3 |
| 4675 | RIRP | RISINGER TRANSPORT CORP | | | SCAC4 |
| 4676 | RIRT | RICHER, ROBERT TRANSPORT | | | SCAC3 |
| 4677 | RIRW | REICHERT, R W | | | SCAC3 |
| 4678 | RIRX | Southeastern Industrial Enterprises, Inc. | 7/2005; eliminated 10/2006 | | NAKINA |
| 4679 | RIRX | Rock Island Oil & Refining Co., Inc. | 4/1947-1/1950 | | NAKINA |
| 4680 | RIRX | Duncan Oil Co., Inc. | 7/1937-1/1941 | | NAKINA |
| 4681 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | 7/1935 | | NAKINA |
| 4682 | RIRX | Rock Island Refining Co. | 7/1930-7/1932 | | NAKINA |
| 4683 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | Apr-38 | | NRHS |
| 4684 | RIRX | *ROCK ISLAND OIL & REFINING CO. [DUNCAN OIL CO., INC.] | | | PWRC |
| 4685 | RIRX | +SOUTHEASTERN INDUSTRIAL ENTERPRISES, INC. | | | PWRC |
| 4686 | RIRX | Southeastern Industrial Enterprises | | | RSRV |
| 4687 | RIRX | SOUTHEASTERN INDUSTRIAL ENTERPRISES | | | SCAC4 |
| 4688 | RIS | Air Services Ltd. | Callsign: Airis, | CZ | AVCODES |
| 4689 | RIS | Aeris Gestion S.L. | Callsign: Aeris, | E | AVCODES |
| 4690 | RIS | Aeris Gestion | | | ICAO1 |
| 4691 | RIS | Rock Island Southern Ry. (Co.) | 7/1923-7/1954 | | NAKINA |
| 4692 | RIS | Rock Island Southern Ry. | 4/38-1/52 | | NRHS |
| 4693 | RIS | Regio-Infra-Service Sachsen GmbH | Chemnitz | D | privat-bahn.de |
| 4694 | RIS | ROCK ISLAND SOUTHERN RWY. CO. | | | PWRC |
| 4695 | RIS | Regio Infra Service | | D | TRAFFIC |
| 4696 | RIS | Regio Infra Service Sachsen GmbH | | DE | VKM |
| 4697 | RISB | RISBERGS TRUCK LINE | | | SCAC3 |
| 4698 | RISB | ROBINSON I SHIPPING CORPORATION LIB | | | SCAC4 |
| 4699 | RISC | RIVERSIDE SERVICE CORPORATION | | | SCAC3 |
| 4700 | RISE | REUSE IT STORE | | | SCAC4 |
