| 3901 | RGSC | ROGERS CARTAGE INC | | | SCAC3 |
| 3902 | RGSD | RUGGLES, DAVID TRUCKING | | | SCAC3 |
| 3903 | RGSE | RISING SUN EXPRESS INC | | | SCAC3 |
| 3904 | RGSE | RISING SUN EXPRESS LLC | | | SCAC4 |
| 3905 | RGSF | RINDEL TRUCKING | | | SCAC4 |
| 3906 | RGSG | R & G EXPRESS INC | | | SCAC4 |
| 3907 | RGSI | RG TRANSPORTATION SERVICE | | | SCAC3 |
| 3908 | RGSI | RG TRANSPORTATION SERVICE | | | SCAC4 |
| 3909 | RGSJ | REDERIJ G S JOUSTRA Y1ST | | | SCAC3 |
| 3910 | RGSK | RIGGS TRUCKING & EXCAVATION INC | | | SCAC3 |
| 3911 | RGSL | REMINGTON SHIPPING LIMITED | | | SCAC3 |
| 3912 | RGSN | ROGERS TRANSPORTS INC | | | SCAC3 |
| 3913 | RGSQ | ROGERS TRUCKING | | | SCAC3 |
| 3914 | RGSR | REGISTERED TRANSPORTATON SYSTEMS IN | | | SCAC3 |
| 3915 | RGSS | RUNGSTED SHIPPING APS | | | SCAC3 |
| 3916 | RGST | R G S TRUCKING | | | SCAC3 |
| 3917 | RGST | REGISTER TRUCKING | | | SCAC4 |
| 3918 | RGSU | REGAS, LLC | | RUS | BIC |
| 3919 | RGSV | ROGERS TRUCK SERVICE INC | | | SCAC3 |
| 3920 | RGT | Airbourne School of Flying | Callsign: Airgoat, Ceased operations. | GB | AVCODES |
| 3921 | RGT | Airbourne School of Flying | | | ICAO1 |
| 3922 | RGT | REGIOTRANS SRL | | RO | VKM |
| 3923 | RGTC | RIGGLE TRUCKING INC | | | SCAC4 |
| 3924 | RGTD | REICHERT, GENE TRUCKING INC | | | SCAC3 |
| 3925 | RGTF | ROGERS TRANSFER, INC | | | SCAC3 |
| 3926 | RGTF | RIVERA GAS TRANSPORTADORA SA DE CV | | | SCAC4 |
| 3927 | RGTI | ROGERS, LOREN TRUCKING COMPANY | | | SCAC3 |
| 3928 | RGTJ | RGTS | | | SCAC4 |
| 3929 | RGTL | RAGSDALE TRUCK LINE INC | | | SCAC3 |
| 3930 | RGTL | R & G TRANSPORT LTD | | | SCAC4 |
| 3931 | RGTM | ROGERS TRUCKING INC | | | SCAC3 |
| 3932 | RGTN | ROME GEORGIA TRANSPORT INC | | | SCAC4 |
| 3933 | RGTO | RANGER TRANSPORT (DIVISION OF LENS | | | SCAC4 |
| 3934 | RGTP | R&G TRANSPORTATION, Cargo Systems, INC | | | SCAC3 |
| 3935 | RGTQ | ROGERS TRANSFER | | | SCAC3 |
| 3936 | RGTQ | RD G TRUCKIN LLC | | | SCAC4 |
| 3937 | RGTR | REGAL WEST CORP | | | SCAC4 |
| 3938 | RGTR | Regiotrans Brasov | | RO | TRAFFIC |
| 3939 | RGTS | REGAL TRANSPORTATION SERVICES INC | | | SCAC3 |
| 3940 | RGTS | RACING TRANSPORTS LLC | | | SCAC4 |
| 3941 | RGTU | RIGTANK GLOBAL S.A. | | PA | BIC |
| 3942 | RGTU | DENVER & RIO GRANDE WESTERN | | | PWRC |
| 3943 | RGTU | Denver and Rio Grande Western Railroad (Union Pacific Railroad) | | | RSRV |
| 3944 | RGTV | ROGERS, TROY VAN | | | SCAC3 |
| 3945 | RGTW | RAYS GARAGE TOWING | | | SCAC3 |
| 3946 | RGTW | ROLLING THUNDER INC | | | SCAC4 |
| 3947 | RGTX | Residco | 1/1994-7/2005 (not listed) | | NAKINA |
| 3948 | RGTX | Residco | 1/94-7/2000 | | NRHS |
| 3949 | RGTX | RESIDCO | | | PWRC |
| 3950 | RGTX | Denver and Rio Grande Western Railroad (Residco) | | | RSRV |
| 3951 | RGTX | RESIDCO | | | SCAC4 |
| 3952 | RGTY | RIO GRAND TRANSPORT | | | SCAC3 |
| 3953 | RGTY | ROBINSON, GERALD TRUCKING | | | SCAC4 |
| 3954 | RGTZ | UP [SP] [DENVER & RIO GRANDE WESTERN] | | | PWRC |
| 3955 | RGTZ | Denver and Rio Grande Western Railroad (Union Pacific Railroad) | | | RSRV |
| 3956 | RGTZ | UNION PACIFIC RAILROAD COMPANY | | | SCAC4 |
| 3957 | RGUA | RANCHO GUACATAY | | | SCAC4 |
| 3958 | RGUQ | REGNU INC | | | SCAC3 |
| 3959 | RGUS | REGENCY U S A TRANSPORTATION CORP I | | | SCAC3 |
| 3960 | RGV | RG Aviation, C.A. | Callsign: Volon, | YV | AVCODES |
| 3961 | RGVC | RGV CONCRETE | | | SCAC4 |
| 3962 | RGVI | RANGER ENVIRONMENTAL INC | | | SCAC4 |
| 3963 | RGVL | RGV LOGISTICS LLC | | | SCAC4 |
| 3964 | RGVS | REGIONAL TRANSIT SERVICES INC | | | SCAC4 |
| 3965 | RGVT | RGV TRUCKING INC | | | SCAC4 |
| 3966 | RGW | RIO GRANDE WESTERN RAILWAY | | | PWRC |
| 3967 | RGW | Rio Grande Western Railway (Union Pacific Railroad) | | | RSRV |
| 3968 | RGWD | ROGERS, WILLIAM D | | | SCAC3 |
| 3969 | RGWG | RGW GLOBAL LOGISTICS LLC | | | SCAC4 |
| 3970 | RGWK | REEDEREI GEBR WINTER GMBH & CO KG | | | SCAC4 |
| 3971 | RGWL | RIGHTWAY LINES | | | SCAC3 |
| 3972 | RGWL | RIGHTWAY LOGISTICS | | | SCAC4 |
| 3973 | RGWR | REDS GARAGE TOWING & RECOVERY INC | | | SCAC3 |
| 3974 | RGWR | ROYERS GENERAL WELDING & | | | SCAC4 |
| 3975 | RGWT | RIGHT WAY TRANSPORT INC | | | SCAC3 |
| 3976 | RGWT | RWT INC | | | SCAC4 |
| 3977 | RGWU | REDGUARD | | USA | BIC |
| 3978 | RGWZ | (REAZ) TRANSAMERICAN LEASING, INC. | | | PWRC |
| 3979 | RGWZ | Rio Grande Western Railway (TAL International) | | | RSRV |
| 3980 | RGWZ | TRANSAMERICA LEASING INC | | | SCAC4 |
| 3981 | RGX | Rotary Gasoline Co. (Highway Oil Refining Corp.) | 7/1923-7/1930 | | NAKINA |
| 3982 | RGX | HIGHWAY OIL REFINING CO. [ROTARY GASOLINE CO.] | | | PWRC |
| 3983 | RGXC | REGIONAL EXPRESS COURIER LLC | | | SCAC4 |
| 3984 | RGXE | RIGGENS EXPRESS INC | | | SCAC4 |
| 3985 | RGXI | REGAL TRANSPORTATION INC | | | SCAC4 |
| 3986 | RGXL | RIEGEL TRANSPORTATION INDUSTRIES LL | | | SCAC4 |
| 3987 | RGXO | RG TRANSPORT | | | SCAC4 |
| 3988 | RGXP | REGENT EXPRESS INC | | | SCAC3 |
| 3989 | RGXS | ROGER EXPRESS SA DE CV | | | SCAC4 |
| 3990 | RGXT | RGX TRANSPORTE DE CARGA INTERNACION | | | SCAC4 |
| 3991 | RGXV | ROGUE TRANSPORTATION (REEFER DIVISI | | | SCAC4 |
| 3992 | RGY | Regency Airlines Ltd. | Callsign: Regency, | USA | AVCODES |
| 3993 | RGY | Regency Air | Callsign: Regency, | USA | AVCODES |
| 3994 | RGY | Regency Airlines | | | ICAO1 |
| 3995 | RGZA | R-GARZA-A | | | SCAC4 |
| 3996 | RGZE | RODRIGUEZ EXPRESS S A DE C V | | | SCAC4 |
| 3997 | RGZM | RODRIGUEZ, MIKE TRUCKING | | | SCAC3 |
| 3998 | RH | Meridiana Air, SA | ICAO: MDN, Callsign: Meridiana Air, Ceased operations on 16 October 1992. | E | AVCODES |
| 3999 | RH | Regal Bahamas International Airlines | | BS | AVCODES |
| 4000 | RH | Regionnair, Inc. | ICAO: GIO, Callsign: Gionnair, Ceased operations on 01 June 2001. | CDN | AVCODES |
