| 501 | REPX | *RELIABLE PACKING CO. | | | PWRC |
| 502 | REPY | ROME EXPRESS INC (IL CORP) | | | SCAC3 |
| 503 | REQC | RELI CARRIERS | | | SCAC4 |
| 504 | REQE | RN EQUIPMENT | | | SCAC4 |
| 505 | REQL | REIT, L INC | | | SCAC3 |
| 506 | REQL | ROTATING EQUIPMENT.COM LLC | | | SCAC4 |
| 507 | REQP | RTI EQUIPMENT CO LTD | | | SCAC4 |
| 508 | REQT | REGAL TRANSPORT INC | | | SCAC3 |
| 509 | REQT | REGAL MARINE INDUSTRIES INC | | | SCAC4 |
| 510 | RER | Servicio Aereo Regional Cia, Ltda. | Callsign: Regair, | EC | AVCODES |
| 511 | RER | Servicio Aereo Regional Regair | | | ICAO1 |
| 512 | RER | | City: Paris | F | TRAFFIC |
| 513 | RERA | REIFF, R A INC | | | SCAC4 |
| 514 | RERD | REED, RANDLE TRUCKING | | | SCAC3 |
| 515 | RERE | ROGERS, R E INC | | | SCAC3 |
| 516 | RERE | ROGERS, R E INC | | | SCAC4 |
| 517 | RERF | REEDHOL REFRIGERATED TRANSPORT INC | | | SCAC3 |
| 518 | RERH | REDIKER R H TRANSPORT LTD | | | SCAC3 |
| 519 | RERI | REED, R TRUCKING INC | | | SCAC3 |
| 520 | RERJ | RENNER, R J TRANSPORT | | | SCAC3 |
| 521 | RERK | REINACHER, RICKY | | | SCAC3 |
| 522 | RERL | REDER LTD | | | SCAC3 |
| 523 | RERM | REINERT MARINE TRANSPORT COMPANY | | | SCAC3 |
| 524 | RERQ | REICH, RAY TRUCKING COMPANY INC | | | SCAC3 |
| 525 | RERT | REINAUER TRANSPORTATION COMPANY | | | SCAC3 |
| 526 | RERU | BEIJING JUNCHI INTERNATIONAL FREIGHT FORWARDERS CO., LTD. | | PRC | BIC |
| 527 | RERV | RED RIVER TRANSPORTATION CO INC | | | SCAC3 |
| 528 | RERW | REESE, R W TRUCKING INC | | | SCAC3 |
| 529 | RERX | READER RAILROAD | | | PWRC |
| 530 | RES | Restauraciones Aeronauticas, S.A. de C.V. | Callsign: Restauraciones, | MEX | AVCODES |
| 531 | RES | Hawaiian Air Tours Service | Callsign: Resort, | USA | AVCODES |
| 532 | RES | Australian Maritime Safety Authority (AMSA) | Callsign: Search, | AUS | AVCODES |
| 533 | RES | Australian Maritime Safety Authority | | | ICAO1 |
| 534 | RESA | RESERVE AGRI-BUSINESS INC | | | SCAC3 |
| 535 | RESA | RED EAGLE SHIPPING AGENCIES PRIVATE | | | SCAC4 |
| 536 | RESB | REASONER, BILL | | | SCAC3 |
| 537 | RESB | RCM EXPEDITED SERVICES | | | SCAC4 |
| 538 | RESC | RESIDENTIAL DELIVERY CARRIERS INC | | | SCAC3 |
| 539 | RESD | ROBERTS, ELI FUELS LLC | | | SCAC4 |
| 540 | RESE | REES ENTERPRISES INC | | | SCAC3 |
| 541 | RESE | REES LOGISTICS CO LLC | | | SCAC4 |
| 542 | RESF | RESEARCH TRANSPORT COMPANY INC | | | SCAC3 |
| 543 | RESF | RES EXHIBITS SERVICES LLC | | | SCAC4 |
| 544 | RESG | RELIABLE SHIPPING AND TRADING | | | SCAC3 |
| 545 | RESH | REISCH TRUCKING & TRANSPORTATION | | | SCAC3 |
| 546 | RESH | RESI | | | SCAC4 |
| 547 | RESI | ROLLINS ENVIRONMENTAL SERVICE | | | SCAC3 |
| 548 | RESI | RESINERA DE HIDALGO S DE RL | | | SCAC4 |
| 549 | RESI | Prescom Resita | City: Resita | RO | TRAFFIC |
| 550 | RESJ | REED, STEPHEN J INC | | | SCAC3 |
| 551 | RESL | RESLER, DEAN | | | SCAC3 |
| 552 | RESL | ROCKET EXPEDITED SERVICES LLC | | | SCAC4 |
| 553 | RESM | RESTMORE MOBILE HOMES | | | SCAC3 |
| 554 | RESN | RESOURCES TRUCKING INC | | | SCAC3 |
| 555 | RESN | RESOURCES TRUCKING INC | | | SCAC4 |
| 556 | RESO | RIVERSIDE STORAGE & CARTAGE COMPANY | | | SCAC3 |
| 557 | RESP | RED SEA EXPRESS | | | SCAC4 |
| 558 | RESQ | READING EXPRESS COMPANY | | | SCAC3 |
| 559 | RESR | RESOURCE RECOVERY CORP | | | SCAC3 |
| 560 | REST | REES TRUCKING CO | | | SCAC3 |
| 561 | RESU | RED EAGLE SHIPPING AGENCIES PVT LTD | | | SCAC4 |
| 562 | RESW | RENSLOW, ROBERT & DARLENE | | | SCAC3 |
| 563 | RESW | REIF ESTATE WINERY | | | SCAC4 |
| 564 | RESX | Rescar Inc. | added 1/1978; 1/1980; eliminated 5/1983; 1/1994-7/2005 (not listed) | | NAKINA |
| 565 | RESX | The Resinous Products & Chemical Co., Inc. | 1/1943-4/1947 | | NAKINA |
| 566 | RESX | Rescar Inc. | added 1/78; 1/80; eliminated 5/83; 1/94-7/2000 | | NRHS |
| 567 | RESX | *RESINOUS PRODUCTS & CHEMICAL CO., INC. | | | PWRC |
| 568 | RESX | +RESCAR, INC. | | | PWRC |
| 569 | RESX | Rescar | | | RSRV |
| 570 | RESX | RESCAR, INC. | | | SCAC4 |
| 571 | RESY | RELCO SYSTEMS INC | | | SCAC3 |
| 572 | RESZ | RESERVE MINING COMPANY | | | PWRC |
| 573 | RESZ | Reserve Mining Co. | | USA | TRAFFIC |
| 574 | RET | | | NL | TRAFFIC |
| 575 | RETA | REIN TRANSPORTATION COMPANY | | | SCAC3 |
| 576 | RETA | RELIABLE TRANSIT CORP | | | SCAC4 |
| 577 | RETB | REYNOLDS, EVERETT TRUCKING COMPANY | | | SCAC4 |
| 578 | RETC | RE TRUCKING | | | SCAC4 |
| 579 | RETD | RETAIL MERCHANTS CONSOLIDATION AND | | | SCAC3 |
| 580 | RETD | RENEGADE TRUCKING | | | SCAC4 |
| 581 | RETE | RETAIL EXPRESS INC | | | SCAC3 |
| 582 | RETF | RELIABLE TRANSFER AND STORAGE COMPA | | | SCAC3 |
| 583 | RETG | REDIEHS TRUCK LINES INC | | | SCAC3 |
| 584 | RETG | RESERVOIR EXPLORATION TECHNOLOGY AS | | | SCAC4 |
| 585 | RETH | R E TRUCKING INCORPORATED | | | SCAC3 |
| 586 | RETI | RIEDELL TRUCKING | | | SCAC3 |
| 587 | RETK | REID TRUCKING | | | SCAC4 |
| 588 | RETL | TNT REDDAWAY TRUCK LINE, INC | | | SCAC3 |
| 589 | RETL | USF REDDAWAY, INC. | | | SCAC3 |
| 590 | RETL | REDDAWAY | | | SCAC4 |
| 591 | RETN | REED TRANSPORTATION | | | SCAC3 |
| 592 | RETN | R & E TRUCKING | | | SCAC4 |
| 593 | RETO | RED TRIANGLE OIL COMPANY | | | SCAC4 |
| 594 | RETP | REGO AUTOTRANSPORTES | | | SCAC4 |
| 595 | RETQ | RENTCO | | | SCAC3 |
| 596 | RETR | REDIEHS INTERSTATE INC | | | SCAC3 |
| 597 | RETR | RE TRANSPORTATION | | | SCAC4 |
| 598 | RETS | ROLLINS ETS (DIV ROLLINS DEDICATED | | | SCAC3 |
| 599 | RETT | R E T INC | | | SCAC4 |
| 600 | RETU | REPARACIONES TECNICAS DE CONTENEDORES S.L. | | E | BIC |
