| 6601 | ROTL | RODELA TRANSPORTACION Y LOGISTICA | SCAC4 | ||
| 6602 | ROTM | R O TRANSPORTATION | SCAC4 | ||
| 6603 | ROTN | ROSS TRUCKING INC | SCAC3 | ||
| 6604 | ROTN | R & O TRANSPORT | SCAC4 | ||
| 6605 | ROTO | ROYAL TRANSPORT INC | SCAC3 | ||
| 6606 | ROTO | ROTORCHROME | SCAC4 | ||
| 6607 | ROTQ | ROGOVIN TRANSPORTATION | SCAC3 | ||
| 6608 | ROTQ | ROLLINS TRANSPORT SERVICE INC | SCAC4 | ||
| 6609 | ROTR | ROSS TRANSFER, INC | SCAC3 | ||
| 6610 | ROTS | RED OAK TRANSFER AND STORAGE CO INC | SCAC3 | ||
| 6611 | ROTT | ROSS'S FREEWAY TRANSIT | SCAC3 | ||
| 6612 | ROTW | RONS TOWING & WRECKING | SCAC3 | ||
| 6613 | ROTW | RENEWAL ONSITE TRUCKING | SCAC4 | ||
| 6614 | ROTX | Pennsylvania-Conley Tank Line, a Division of General American Transportation Corp. | 4/1938 | NAKINA | |
| 6615 | ROTX | Republic Oil Co. | 7/1932-7/1937 | NAKINA | |
| 6616 | ROTX | Republic Oil Co. | Apr-38 | NRHS | |
| 6617 | ROTX | *PENNSYLVANIA-CONLEY TANK LINE, DIV. GENERAL AMERICAN TRANSPORTATION CORP. | PWRC | ||
| 6618 | ROTY | ROTHE, RAYMOND | SCAC3 | ||
| 6619 | ROTY | ROTOCHOPPER INC | SCAC4 | ||
| 6620 | ROU | Transportes Aereos I.R. Crusoe | ICAO1 | ||
| 6621 | ROUA | ROUX, NORMAN W | SCAC3 | ||
| 6622 | ROUA | ROUNDABOUT ENTERPRISES INC | SCAC4 | ||
| 6623 | ROUC | ROSS, JOHN L TRUCKING | SCAC3 | ||
| 6624 | ROUD | ROUSEY DELIVERY SERVICE | SCAC3 | ||
| 6625 | ROUE | ROUTE MESSENGERS OF PENNSYLVANIA IN | SCAC3 | ||
| 6626 | ROUEN | City: Rouen | F | TRAFFIC | |
| 6627 | ROUF | ROUNTREE, FRANK, PRODUCE COMPANY | SCAC3 | ||
| 6628 | ROUH | ROUTHIER, J P & SONS INC | SCAC3 | ||
| 6629 | ROUH | ROUTHIER, J P & SONS INC | SCAC4 | ||
| 6630 | ROUI | ROUTES TRANSPORT INTERNATIONAL INC | SCAC3 | ||
| 6631 | ROUK | ROUES-ALEX INC | SCAC4 | ||
| 6632 | ROUN | ROUNTREE TRANSPORT & RIGGING INC | SCAC4 | ||
| 6633 | ROUO | ROMAC EXPRESS | SCAC3 | ||
| 6634 | ROUO | ROUNDERS TRANSPORTATION AND LOGISTI | SCAC4 | ||
| 6635 | ROUP | ROUND-UP TRUCKING INC | SCAC3 | ||
| 6636 | ROUR | ROUGHRIDER TRANSPORTATION INC | SCAC4 | ||
| 6637 | ROUS | ROUSSIN, ALDEE TRANSPORT INC | SCAC3 | ||
| 6638 | ROUT | ROUNSAVILLE TRUCKING INC | SCAC4 | ||
| 6639 | ROUV | ROUSH VAN LINES INC | SCAC3 | ||
| 6640 | ROUY | ROCKET SUPPLY CORPORATION | SCAC4 | ||
| 6641 | ROV | Rover Airways International | ICAO1 | ||
| 6642 | ROVH | ROUST VEHICLES INC | SCAC3 | ||
| 6643 | ROVI | ROYAL VAN & STORAGE INC | SCAC3 | ||
| 6644 | ROVM | RAINIER OVERSEAS MOVERS INC | SCAC3 | ||
| 6645 | ROVO | RONNANS TRANSFER AND STORAGE COMPAN | SCAC3 | ||
| 6646 | ROVS | ROGERS VAN & STORAGE, INC | SCAC3 | ||
| 6647 | ROVT | ROSS TRUCKING | SCAC3 | ||
| 6648 | ROVTR | VEST TRANS RAIL SRL | RO | VKM | |
| 6649 | ROVU | STEINWEG HANDLSVEEM BV | SCAC4 | ||
| 6650 | ROWA | ROADCAP, WARD, JR, INC | SCAC3 | ||
| 6651 | ROWB | ROWLAND BROS MOVING & STORAGE COMPA | SCAC3 | ||
| 6652 | ROWC | ROBERTSON, WILBUR C | SCAC3 | ||
| 6653 | ROWD | ROW-DOM INC | SCAC3 | ||
| 6654 | ROWF | ROWE, TOM SERVICE | SCAC3 | ||
| 6655 | ROWG | ROWDEN, GERALD | SCAC3 | ||
| 6656 | ROWH | ROBINSON TERMINAL WAREHOUSE CORPORA | SCAC3 | ||
| 6657 | ROWH | ROBINSON TERMINAL WAREHOUSE CORPORA | SCAC4 | ||
| 6658 | ROWI | RIGHT-O-WAY INC (A CALIF CORP) | SCAC3 | ||
| 6659 | ROWI | ROWDY EXPRESS INC | SCAC4 | ||
| 6660 | ROWK | ROWLAND, KING B TRUCKING INC | SCAC3 | ||
| 6661 | ROWL | ROWELL, DON INC | SCAC3 | ||
| 6662 | ROWM | ROYAL OAK WASTE PAPER & METAL CO | SCAC4 | ||
| 6663 | ROWN | ROWLAND TRANSPORTATION INC | SCAC4 | ||
| 6664 | ROWO | ROWE MOVING & STORAGE CO | SCAC3 | ||
| 6665 | ROWP | RPM TRUCKING INC | SCAC4 | ||
| 6666 | ROWQ | ROBBINS WAREHOUSE & DIST CO | SCAC3 | ||
| 6667 | ROWR | ROWE, R W TRUCKING | SCAC3 | ||
| 6668 | ROWS | ROBINSON WRECKER SERVICE | SCAC3 | ||
| 6669 | ROWS | ROWLAND SEEDS INC | SCAC4 | ||
| 6670 | ROWV | RIGHT O WAY DELIVERY INC | SCAC3 | ||
| 6671 | ROWY | RIGHT-O-WAY TRUCKING INC | SCAC3 | ||
| 6672 | ROX | Roblex Aviation | ICAO1 | ||
| 6673 | ROX | Atlantic Richfield Co. | added 7/1966; 10/1966-4/1970; eliminated 1/1972 | NAKINA | |
| 6674 | ROX | Richfield Oil Corp. | 7/1937-7/1965; eliminated 7/1966 | NAKINA | |
| 6675 | ROX | Richfield Oil Co. of California | 7/1930-7/1935 | NAKINA | |
| 6676 | ROX | Richfield Oil Corporation | 4/38-7/65; eliminated 7/66 | NRHS | |
| 6677 | ROX | Atlantic Richfield Co. | added 7/66; 10/66-4/70; eliminated 1/72 | NRHS | |
| 6678 | ROX | ATLANTIC RICHFIELD CO. [RICHFIELD OIL CORP.] | PWRC | ||
| 6679 | ROXB | ROXBURY TRUCKING CO INC | SCAC3 | ||
| 6680 | ROXC | RIO EXPRESS (MX-374938) | SCAC4 | ||
| 6681 | ROXE | ROAD ONE (1) EXPRESS INC | SCAC4 | ||
| 6682 | ROXM | ROXMAN TRUCKING | SCAC4 | ||
| 6683 | ROXN | R & O TRANSFER | SCAC4 | ||
| 6684 | ROXS | ROCKET EXPRESS INTERNATIONAL | SCAC3 | ||
| 6685 | ROXS | ROCKET EXPRESS COURIER | SCAC4 | ||
| 6686 | ROXT | ROLLIN-ON EXPRESS TRUCKING INC | SCAC3 | ||
| 6687 | ROXT | ROMEX TRANSPORT INC | SCAC4 | ||
| 6688 | ROXU | EMCO MARINE LTD / CONTAINERS DPT | SCAC4 | ||
| 6689 | ROXX | Rocky Mountain Recycling, Inc. | added 4/2007; eliminated 7/2007; added 1/2009 | NAKINA | |
| 6690 | ROXX | ROCKY MOUNTIAN RECYCLING, INC. | PWRC | ||
| 6691 | ROXX | ROCKY MOUNTAIN RECYCLING INC | SCAC4 | ||
| 6692 | ROY | Conifair Aviation | ICAO1 | ||
| 6693 | ROY | STE ROY | FR | VKM | |
| 6694 | ROYC | ROYAL TRAFFIC | SCAC4 | ||
| 6695 | ROYD | ROYAL CREST DISTRIBUTORS INC | SCAC3 | ||
| 6696 | ROYE | ROYAL EXPRESS INC | SCAC4 | ||
| 6697 | ROYF | ROYAL LOGISTICS INC | SCAC4 | ||
| 6698 | ROYG | ROYALE CARTAGE INC | SCAC3 | ||
| 6699 | ROYI | ROYS TRANSFER INC | SCAC3 | ||
| 6700 | ROYI | ROYS TRANSFER INC | SCAC4 |