| 1 | RX | Oklahoma Tank Car Co. | 7/1937-1/1950 | NAKINA | |
| 2 | RX | Oklahoma Tank Car Co. | Apr-38 | NRHS | |
| 3 | RX | OKLAHOMA TANK CAR CO. | PWRC | ||
| 4 | RX | Rail-X AB | SE | VKM | |
| 5 | RXA | Regional Express | IATA: ZL | ICAO1 | |
| 6 | RXAQ | ROLLING EXPRESS AGENCY | SCAC3 | ||
| 7 | RXAQ | RENTX TRANSPORTATION SERVICES CORPO | SCAC4 | ||
| 8 | RXAT | REX AIRE TRANSPORT | SCAC3 | ||
| 9 | RXAT | REEFER XPRESS LINES INC (DIV OF | SCAC4 | ||
| 10 | RXBM | REXBURG MOBILE HOME SALES | SCAC3 | ||
| 11 | RXBM | ROLLON EXPRESS INC | SCAC4 | ||
| 12 | RXCG | RAINIER EXPRESS CARGO | SCAC4 | ||
| 13 | RXCN | RX CONSOLIDATORS INC | SCAC3 | ||
| 14 | RXCN | REGIO EXPRESS | SCAC4 | ||
| 15 | RXCO | RICHMOND EXPRESS CO INC | SCAC3 | ||
| 16 | RXCQ | REXHAM CORP | SCAC3 | ||
| 17 | RXDE | RX DELIVERY | SCAC3 | ||
| 18 | RXDE | RICOCHET XPRESS XPEDITERS INC | SCAC4 | ||
| 19 | RXDS | REED EXPRESS DELIVERY SERVICE | SCAC4 | ||
| 20 | RXEI | ROXIES EXPRESS INC | SCAC4 | ||
| 21 | RXIC | ROSS' EXPRESS, INC | SCAC3 | ||
| 22 | RXIC | ROSS EXPRESS INC | SCAC4 | ||
| 23 | RXIE | RV XPRESS INC | SCAC4 | ||
| 24 | RXIF | REX INTL FORWARDING CO LTD | SCAC4 | ||
| 25 | RXIT | REXITE INC | SCAC3 | ||
| 26 | RXKG | RUX TRUCKING | SCAC4 | ||
| 27 | RXLD | RUSH EXPRESS LTD | SCAC3 | ||
| 28 | RXLI | ROUTE TRANSPORTATION & LOGISTICS IN | SCAC4 | ||
| 29 | RXLN | REDEX LOGISTICS INC | SCAC4 | ||
| 30 | RXLS | RAMAX LOGISTICS | SCAC4 | ||
| 31 | RXLT | REXLOR TRANSPORT INC | SCAC3 | ||
| 32 | RXLW | REIMER EXPRESS LINES, (WESTERN) LTD | SCAC3 | ||
| 33 | RXLW | REFLEX TRUCK LINERS | SCAC4 | ||
| 34 | RXMC | ROMCAN EXPRESS LIMITED | SCAC4 | ||
| 35 | RXMQ | REX MOTOR FREIGHT COMPANY | SCAC3 | ||
| 36 | RXMQ | ROADSTAR EXPRESS LLC | SCAC4 | ||
| 37 | RXMY | REX MEYERS TRANSFER | SCAC3 | ||
| 38 | RXNA | ROXANA SHIPPING S A | SCAC4 | ||
| 39 | RXNC | REX & CO INC | SCAC3 | ||
| 40 | RXOC | REX OIL CO INC | SCAC4 | ||
| 41 | RXOM | REX OIL COMPANY INC | SCAC4 | ||
| 42 | RXP | Royal Aviation Express | ICAO1 | ||
| 43 | RXP | Rail Experts | NL | TRAFFIC | |
| 44 | RXPC | RAYNOR EXPRESS CORP | SCAC3 | ||
| 45 | RXPC | RAYNOR EXPRESS CORP | SCAC4 | ||
| 46 | RXPD | RARITAN EXPRESS DISTRIBUTION INC | SCAC3 | ||
| 47 | RXPE | R EXPRESS | SCAC3 | ||
| 48 | RXPE | RAI EXPRESS LINES LTD | SCAC4 | ||
| 49 | RXPF | RANGER EXPRESS FORWARDING INC | SCAC4 | ||
| 50 | RXPG | RESOURCE TRANSPORT LLC | SCAC4 | ||
| 51 | RXPH | ROAD XPRESS | SCAC4 | ||
| 52 | RXPI | REGIONAL EXPRESS INC | SCAC4 | ||
| 53 | RXPK | READY EXPRESS INC | SCAC4 | ||
| 54 | RXPL | REGAL TRANSPORT SYSTEMS LLC | SCAC4 | ||
| 55 | RXPN | RICHLAND EXPRESS INC | SCAC3 | ||
| 56 | RXPP | RELIABLE EXPRESS TRANSPORTATION INC | SCAC4 | ||
| 57 | RXPQ | REDLANDS EXPRESS CO INC | SCAC3 | ||
| 58 | RXPQ | RUXPINS EXPRESS | SCAC4 | ||
| 59 | RXPR | RELIABLE EXPRESS INC | SCAC3 | ||
| 60 | RXPR | RELIABLE EXPRESS INC | SCAC4 | ||
| 61 | RXRC | REXROTH CORPORATION | SCAC3 | ||
| 62 | RXRE | REPUBLIC EXPRESS CORP | SCAC4 | ||
| 63 | RXRT | RITTER TRANSPORTATION | SCAC4 | ||
| 64 | RXSC | REXANAX SHIPPING COMPANY LIMITED | SCAC4 | ||
| 65 | RXSN | RELIABLE TRANSPORT SOLUTIONS | SCAC4 | ||
| 66 | RXST | RAMSEY EXPRESS TRUCKING | SCAC4 | ||
| 67 | RXT | Aeroxtra | ICAO1 | ||
| 68 | RXTC | ROMAN TRANSPORT INC | SCAC4 | ||
| 69 | RXTD | RAVAX TRUCKING LTD | SCAC4 | ||
| 70 | RXTI | RAYMEX TRANSPORT INC | SCAC4 | ||
| 71 | RXTK | REX TRUCKING INC | SCAC4 | ||
| 72 | RXWY | REXWAY TRANSPORT INC | SCAC4 | ||
| 73 | RXX | Express Air Charter | ICAO1 | ||
| 74 | RXXZ | TRANSAMERICA LEASING INC [(REAZ) RETIRED 04-06-93 ATP (ACI 2374)] | PWRC | ||
| 75 | RXXZ | TIP Intermodal Services | RSRV | ||
| 76 | RXXZ | TRANSPORT INTERNATIONAL POOL INC | SCAC4 |