| 1801 | BCIS | BEACH CITY SERVICES | | | SCAC4 |
| 1802 | BCIT | Canadian National Railways | added 7/2005; 7/2005 | | NAKINA |
| 1803 | BCIT | BC Rail Ltd. | added 10/1984; 1/1994-7/2000; eliminated 7/2005 | | NAKINA |
| 1804 | BCIT | British Columbia Ry. Co. | 1/1975-1/1980; eliminated 10/1984 | | NAKINA |
| 1805 | BCIT | British Columbia Ry. Co. | 1/75-1/80; eliminated 10/84 | | NRHS |
| 1806 | BCIT | BC Rail Ltd. | added 10/84; 1/94-7/2000 | | NRHS |
| 1807 | BCIT | CANADIAN NATIONAL RAILWAYS [BC RAIL, LTD.] | | | PWRC |
| 1808 | BCIT | BC RAIL LTD. | | | PWRC |
| 1809 | BCIT | British Columbia Railway (Canadian National Railway) | | | RSRV |
| 1810 | BCIU | AL BAHA COMPANY FOR CAUSTIC-CHLORINE INDUSTRY | | JOR | BIC |
| 1811 | BCIU | BAY CITIES LEASING COMPANY | | | PWRC |
| 1812 | BCIU | Bay Cities Leasing | | | RSRV |
| 1813 | BCIV | BUTLER & CO INC | | | SCAC3 |
| 1814 | BCIV | BUTLER & COMPANY INC | | | SCAC4 |
| 1815 | BCIW | BK CHARTER INC | | | SCAC4 |
| 1816 | BCIX | Blue Circle Inc. | added 4/1987; 1/1994-7/2005 | | NAKINA |
| 1817 | BCIX | Blue Circle Inc. | added 4/87; 1/94-7/2000 | | NRHS |
| 1818 | BCIX | BLUE CIRCLE, INC. | | | PWRC |
| 1819 | BCIX | BLUE CIRCLE INC. | | | PWRC |
| 1820 | BCIX | Blue Circle | | | RSRV |
| 1821 | BCIX | BLUE CIRCLE, INC. | | | SCAC4 |
| 1822 | BCIY | BIOCEAN CANADA INC | | | SCAC4 |
| 1823 | BCJ | Blue Jet Charters sp. z.o.o. | Callsign: Blue Boy, | PL | AVCODES |
| 1824 | BCJ | BEAR CREEK JUNCTION, INC. | | | PWRC |
| 1825 | BCJA | BACHMANN, J A | | | SCAC3 |
| 1826 | BCJA | BETTENCOURT, JASON TRANSPORT LTD | | | SCAC4 |
| 1827 | BCJC | BOSTON COACH - NEW JERSEY CORP | | | SCAC3 |
| 1828 | BCJI | BCJ TRUCKING INC | | | SCAC3 |
| 1829 | BCJI | BCJ TRUCKING INC | | | SCAC4 |
| 1830 | BCJP | BCJA TRANSPORT | | | SCAC4 |
| 1831 | BCJU | BAY CITIES LEASING COMPANY | | | PWRC |
| 1832 | BCJU | BAY CITIES LEASING COMPANY | | | PWRC |
| 1833 | BCJU | Bay Cities Leasing | | | RSRV |
| 1834 | BCK | Priority Aviation Company, Inc. | Callsign: Bankcheck, | USA | AVCODES |
| 1835 | BCK | Priority Aviation Company | | | ICAO1 |
| 1836 | BCK | Buffalo Creek R.R. | 8/1920-10/1966 & 1/1975; eliminated 10/1977 | | NAKINA |
| 1837 | BCK | Consolidated Rail Corp. | 1/1980-1/1994; eliminated 7/1999 | | NAKINA |
| 1838 | BCK | Buffalo Creek R.R. | 7/23-10/66 & 1/75 | | NRHS |
| 1839 | BCK | Consolidated Rail Corp. | 1/80-1/94; eliminated 7/99 | | NRHS |
| 1840 | BCK | CONSOLIDATED RAIL CORP. [BUFFALO CREEK RR] | | | PWRC |
| 1841 | BCK | CONSOLIDATED RAIL CORP. [BUFFALO CREEK RY.] | | | PWRC |
| 1842 | BCK | Buffalo Creek Railroad (Conrail) | | | RSRV |
| 1843 | BCK | BUFFALO CREEK RAILROAD COMPANY, THE | | | SCAC4 |
| 1844 | BCK | Buffalo Creek Railroad | | USA | TRAFFIC |
| 1845 | BCK | BauCharter Baumaschinen Vermietungs GmbH | | DE | VKM |
| 1846 | BCKA | BECK SUPPLIERS INC | | | SCAC4 |
| 1847 | BCKB | BUCKLAND LOGISTICS INC | | | SCAC4 |
| 1848 | BCKC | BROCK CANDY COMPANY (A CORPORATION) | | | SCAC3 |
| 1849 | BCKC | BECKER TRUCKING | | | SCAC4 |
| 1850 | BCKD | BECKMANN DISTRIBUTION SERVICE | | | SCAC3 |
| 1851 | BCKE | BEAR CREEK TRANSPORT LLC | | | SCAC4 |
| 1852 | BCKF | BICKFORD TRANSPORTATION INC | | | SCAC3 |
| 1853 | BCKG | BRACKMANN TRUCKING INC | | | SCAC4 |
| 1854 | BCKH | BROCKHOUSE TRUCKING | | | SCAC3 |
| 1855 | BCKI | BECK TRUCKING CO INC | | | SCAC3 |
| 1856 | BCKI | BACK TRUCKING INC | | | SCAC4 |
| 1857 | BCKK | BRACKETT TRUCKING | | | SCAC3 |
| 1858 | BCKK | BLACK CANYON TRANSPORT INC | | | SCAC4 |
| 1859 | BCKL | BRICK CARRIERS LLC | | | SCAC4 |
| 1860 | BCKM | BUCKENME | | | SCAC4 |
| 1861 | BCKN | BOICKEN, LESTER | | | SCAC3 |
| 1862 | BCKN | BICKNELL RACING PRODUCTS | | | SCAC4 |
| 1863 | BCKO | BECKMANN, HELMUT | | | SCAC4 |
| 1864 | BCKP | BECKER ENTERPRISES | | | SCAC3 |
| 1865 | BCKQ | BECK, ROBERT JR | | | SCAC3 |
| 1866 | BCKR | BECKER COMPANY, INC | | | SCAC3 |
| 1867 | BCKR | BECKER COMPANY, INC | | | SCAC4 |
| 1868 | BCKT | BECKER TRUCKING INC | | | SCAC3 |
| 1869 | BCKT | BECKER TRUCKING | | | SCAC4 |
| 1870 | BCKV | BECK TRANSPORTATION | | | SCAC3 |
| 1871 | BCKV | BROCKSTON INTERNATIONAL | | | SCAC4 |
| 1872 | BCKY | BUCKEYE PIPE LINE COMPANY L P | | | SCAC3 |
| 1873 | BCL | British Caribbean Airways | IATA: BJ, | GB | AVCODES |
| 1874 | BCL | British Caribbean Airways | | | ICAO1 |
| 1875 | BCL | BURKE, CHARLES LEASING INC | | | SCAC4 |
| 1876 | BCLA | BAY CITIES LEASING COMPANY | | | SCAC3 |
| 1877 | BCLB | BORDER CITY LOGISTICS INC | | | SCAC4 |
| 1878 | BCLC | BARTLETT-COLLINS CO | | | SCAC3 |
| 1879 | BCLC | BALTIC CARGO LLC | | | SCAC4 |
| 1880 | BCLD | BOTTLER CARTAGE LTD | | | SCAC3 |
| 1881 | BCLF | BEACH LEASING INC | | | SCAC3 |
| 1882 | BCLF | B & C LAND SERVICES LLC | | | SCAC4 |
| 1883 | BCLG | BERCHTOLD, CLARENCE LAWRENCE TRUCKI | | | SCAC3 |
| 1884 | BCLH | BARRACLOUGH TRUCKING | | | SCAC3 |
| 1885 | BCLH | BEST CARRIERS LTD | | | SCAC4 |
| 1886 | BCLI | BELL-CAMP LEASING CORP | | | SCAC3 |
| 1887 | BCLI | BALEARIA CARIBBEAN LTD CORP | | | SCAC4 |
| 1888 | BCLJ | BLACK TIE LIMOUSINE SERVICE | | | SCAC3 |
| 1889 | BCLJ | BONDS CONSTRUCTION LLC | | | SCAC4 |
| 1890 | BCLK | BROWN, C L TRUCKING | | | SCAC3 |
| 1891 | BCLL | BABCOCK COACH LINES LIMITED | | | SCAC3 |
| 1892 | BCLL | BERMUDA CONTAINER LINE LTD | | | SCAC4 |
| 1893 | BCLM | BOONE COUNTY LUMBER COMPANY | | | SCAC3 |
| 1894 | BCLN | BRITISH CONTINENTAL SHIPPING LINE L | | | SCAC3 |
| 1895 | BCLO | BARLOW CARTAGE LTD | | | SCAC3 |
| 1896 | BCLO | BRES CARRANZA, LORENZO MANOLO | | | SCAC4 |
| 1897 | BCLP | BEST CHOICE LIMOUSINE INC | | | SCAC3 |
| 1898 | BCLP | BCL LOGISTICS LLC | | | SCAC4 |
| 1899 | BCLQ | BACLACON LTD | | | SCAC3 |
| 1900 | BCLR | Bay Colony R.R. Corp. | added 10/1982; 1/1994-7/2000; eliminated 4/2003; 7/2005; added 4/2009 | | NAKINA |
