| 1 | CBR | Cabair Helicopters Ltd / CCAT | Callsign: Cabair London, Ceased operations. | GB | AVCODES |
| 2 | CBR | Cabair Air Taxis Limited | Callsign: Cabair, | GB | AVCODES |
| 3 | CBR | Cobra Aviation | Callsign: Strike, | ZA | AVCODES |
| 4 | CBR | Cabair College of Air Training | | | ICAO1 |
| 5 | CBR | *CLOVE BRANCH RAILROAD | | | PWRC |
| 6 | CBR | *CURTIS BAY RAILROAD CO. | | | PWRC |
| 7 | CBR | COOS BAY RAILROAD OPERATING CO LLC | | | SCAC4 |
| 8 | CBR | CB Rail | | EU | TRAFFIC |
| 9 | CBR | CBRail Sarl | | LU | VKM |
| 10 | CBRA | CAMBRA TRUCKING INC | | | SCAC3 |
| 11 | CBRB | CHAHAL BROS | | | SCAC4 |
| 12 | CBRC | C & B RANCH | | | SCAC3 |
| 13 | CBRD | CHAMBERLAND, R F POTATO CORP | | | SCAC3 |
| 14 | CBRD | CHAMBERLAND, R F INC | | | SCAC4 |
| 15 | CBRE | CARE BEAR REFRIGERATED TRANSPORT IN | | | SCAC4 |
| 16 | CBRF | CHARBONNEAU, ROGER F TRUCKING | | | SCAC3 |
| 17 | CBRG | CANAL BARGE CO INC | | | SCAC3 |
| 18 | CBRG | CANAL BARGE COMPANY INC | | | SCAC4 |
| 19 | CBRG | CBRail II GmbH | | DE | VKM |
| 20 | CBRH | CORRIGAN BROTHERS INC | | | SCAC3 |
| 21 | CBRH | CABRERA RINCON, LUZ MARIA | | | SCAC4 |
| 22 | CBRI | CABRILLO MOVING SERVICE INC | | | SCAC3 |
| 23 | CBRI | CBR TRANSPORT INC | | | SCAC4 |
| 24 | CBRK | CARRERE BROS ROCK CO | | | SCAC3 |
| 25 | CBRL | CROSS-BORDER LOGISTICS LLC | | | SCAC4 |
| 26 | CBRL | CBRail Leasing Sarl | | LU | VKM |
| 27 | CBRLG | CBRail Leasing GmbH | | LU | VKM |
| 28 | CBRM | Chillicothe-Brunswick Rail Maintenance Authority | added 7/1994; added 7/1995; eliminated 4/1997; 7/2000-7/2005 | | NAKINA |
| 29 | CBRM | Chillicothe-Brunswick Rail Maintenance Authority | added 7/94; added 7/95; eliminated 4/97; 7/2000 | | NRHS |
| 30 | CBRM | CHILLICOTHE-BRUNSWICK RAIL MAINTENANCE AUTHORITY | | | PWRC |
| 31 | CBRM | Chillicothe-Brunswick Rail Maintenance Authority | | | RSRV |
| 32 | CBRM | CHILLICOTHE-BRUNSWIC | | | SCAC4 |
| 33 | CBRN | CARIBBEAN REFRIGERATION & TRANSPORT | | | SCAC3 |
| 34 | CBRN | CORBETT, BRIAN | | | SCAC4 |
| 35 | CBRO | CAMBLE, ROBERT | | | SCAC3 |
| 36 | CBRP | CAMBRIA TRANSPORT LTD | | | SCAC3 |
| 37 | CBRQ | COTTON BELT HISTORICAL SOCIETY | | | PWRC |
| 38 | CBRR | COLUMBIA RIVER TRANSFER, INC | | | SCAC3 |
| 39 | CBRS | CLANCY BROS TRANSPORTATION | | | SCAC3 |
| 40 | CBRS | COSIO BROTHERS | | | SCAC4 |
| 41 | CBRS | Cargo Beamer RollingStock GmbH | | DE | VKM |
| 42 | CBRT | CABRERA TRANSPORTATION INC | | | SCAC4 |
| 43 | CBRU | CANBERRA CONTAINERS | | AUS | BIC |
| 44 | CBRV | COLUMBIA RIVER SHAKE & SHINGLE LTD | | | SCAC3 |
| 45 | CBRW | Columbia Basin R.R. Co., Inc. | added 4/1997; 7/2000-7/2005 | | NAKINA |
| 46 | CBRW | Columbia Basin R.R. Co., Inc. | added 4/97; 7/2000 | | NRHS |
| 47 | CBRW | COLUMBIA BASIN RAILROAD CO. | | | PWRC |
| 48 | CBRW | Columbia Basin Railroad | | | RSRV |
| 49 | CBRW | COLUMBIA BASIN RAILROAD COMPANY INC | | | SCAC4 |
| 50 | CBRW | Columbia Basin R.R. Co., Inc. | | USA | TRAFFIC |
| 51 | CBRX | Charles Barthoid | 7/2005 (not listed) | | NAKINA |
| 52 | CBRX | The Columbiana Boiler Co. | added 4/1959; 4/1961-7/1965; eliminated 4/1966 | | NAKINA |
| 53 | CBRX | The Columbus Packing Co. | 7/1937 | | NAKINA |
| 54 | CBRX | Columbus Packing Co. (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 55 | CBRX | Capitol Brand Refrigerator Express (The Columbus Packing Co.) | 7/1930-7/1932 | | NAKINA |
| 56 | CBRX | The Columbiana Boiler Co. | 4/61-7/65; eliminated 4/66 | | NRHS |
| 57 | CBRX | *COLUMBUS PACKING CO [CAPITOL BRAND REFRIGERATOR EXPRESS] | | | PWRC |
| 58 | CBRX | *COLUMBIANA BOILER CO. | | | PWRC |
| 59 | CBRX | *CBEC RAILWAY, INC. | | | PWRC |
| 60 | CBRX | +CHARLES BARTHOID | | | PWRC |
| 61 | CBRX | Charles Barthoid | | | RSRV |
| 62 | CBRX | COLUMBIANA BOILER CO | | | SCAC3 |
| 63 | CBRX | BARTHOLD, CHARLES | | | SCAC4 |
| 64 | CBRY | Copper Basin Ry., Inc. | added 10/1986; eliminated 7/1992; added 10/1992; 1/1994-7/2005 | | NAKINA |
| 65 | CBRY | Copper Basin Ry., Inc. | added 10/86; eliminated 7/92; added 10/92; 1/94-7/2000 | | NRHS |
| 66 | CBRY | COPPER BASIN RAILWAY COMPANY | | | PWRC |
| 67 | CBRY | Copper Basin Railway | | | RSRV |
| 68 | CBRY | COPPER BASIN RAILWAY INC | | | SCAC3 |
