| 1 | RUD | Air Anastasia Ltd | Callsign: Anastasia, | UA | AVCODES |
| 2 | RUD | Air Anastasia | | | ICAO1 |
| 3 | RUDD | RUDDWAY DRAYAGE, INC | | | SCAC3 |
| 4 | RUDE | RUDE TRANSPORTATION COMPANY, INC | | | SCAC3 |
| 5 | RUDH | RUDD, HARLAN D | | | SCAC3 |
| 6 | RUDH | RUIZ CARRILLO, IGNACIO & JUAN FRANC | | | SCAC4 |
| 7 | RUDI | RUDDS TRANSFER AND STORAGE INC | | | SCAC4 |
| 8 | RUDJ | RUDE, JOHN VAN & STORAGE COMPANY | | | SCAC3 |
| 9 | RUDK | RU-D TRUCKING | | | SCAC4 |
| 10 | RUDL | RUSSELL DELIVERY | | | SCAC4 |
| 11 | RUDN | RUDDLE TRUCKING INC | | | SCAC3 |
| 12 | RUDN | RIDEOUT CARREIRS INC | | | SCAC4 |
| 13 | RUDO | RUDOLPHS INC | | | SCAC3 |
| 14 | RUDO | RUDOLPH FREIGHT SYSTEMS INC | | | SCAC4 |
| 15 | RUDP | RUDOLPHS EXPRESS | | | SCAC3 |
| 16 | RUDP | RUDOLPHS SPECIALTY BAKERIES LTD | | | SCAC4 |
| 17 | RUDQ | RUDY TRANSFER INC | | | SCAC3 |
| 18 | RUDR | RUDY, RICHARD B INC | | | SCAC3 |
| 19 | RUDS | RUDE, MURRAY SERVICES INC | | | SCAC3 |
| 20 | RUDT | RUD, SCOTT TRUCKING INC | | | SCAC4 |
| 21 | RUDV | RUSH DELIVERY SERVICE CO | | | SCAC3 |
| 22 | RUDX | Ruddy Tank Car Co. | added 10/1968; 4/1970-7/2000; eliminated 4/2005; 7/2005 (not listed) | | NAKINA |
| 23 | RUDX | Reid's Union Dairy, Inc. | 7/1935 | | NAKINA |
| 24 | RUDX | Ruddy Tank Car Co. | added 10/68; 4/70-7/2000 | | NRHS |
| 25 | RUDX | RUDDY TANK CAR COMPANY | | | PWRC |
| 26 | RUDX | Ruddy Tank Car | | | RSRV |
| 27 | RUDX | RUDDY TANK CAR COMPANY | | | SCAC4 |
