| 1 | RIR | Ronnair Oy | Callsign: Ronnair, | FIN | AVCODES |
| 2 | RIRA | RICHMOND, RAYMOND | | | SCAC3 |
| 3 | RIRA | RILEY RACING LLC | | | SCAC4 |
| 4 | RIRB | RINDAL, ROBERT | | | SCAC3 |
| 5 | RIRB | RINDAL, ROBERT | | | SCAC4 |
| 6 | RIRC | RINCON RECYCLING INC | | | SCAC4 |
| 7 | RIRD | RICHARDS TRANSIT, INC | | | SCAC3 |
| 8 | RIRG | RINGER, G & COMPANY INC | | | SCAC3 |
| 9 | RIRI | RICH, R E TRUCKING CO | | | SCAC3 |
| 10 | RIRL | RIVERA, RAUL TRUCKING | | | SCAC3 |
| 11 | RIRN | RICKELMAN TRUCKING | | | SCAC3 |
| 12 | RIRP | RISINGER TRANSPORT CORP | | | SCAC4 |
| 13 | RIRT | RICHER, ROBERT TRANSPORT | | | SCAC3 |
| 14 | RIRW | REICHERT, R W | | | SCAC3 |
| 15 | RIRX | Southeastern Industrial Enterprises, Inc. | 7/2005; eliminated 10/2006 | | NAKINA |
| 16 | RIRX | Rock Island Oil & Refining Co., Inc. | 4/1947-1/1950 | | NAKINA |
| 17 | RIRX | Duncan Oil Co., Inc. | 7/1937-1/1941 | | NAKINA |
| 18 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | 7/1935 | | NAKINA |
| 19 | RIRX | Rock Island Refining Co. | 7/1930-7/1932 | | NAKINA |
| 20 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | Apr-38 | | NRHS |
| 21 | RIRX | *ROCK ISLAND OIL & REFINING CO. [DUNCAN OIL CO., INC.] | | | PWRC |
| 22 | RIRX | +SOUTHEASTERN INDUSTRIAL ENTERPRISES, INC. | | | PWRC |
| 23 | RIRX | Southeastern Industrial Enterprises | | | RSRV |
| 24 | RIRX | SOUTHEASTERN INDUSTRIAL ENTERPRISES | | | SCAC4 |
