| 9101 | BOYR | BOYER, LARRY & STEVE | | | SCAC4 |
| 9102 | BOYS | BOYER MOVING & STORAGE | | | SCAC3 |
| 9103 | BOYT | BOYD TRANSFER & STORAGE CO | | | SCAC3 |
| 9104 | BOYT | BOYER TOWING INC | | | SCAC4 |
| 9105 | BOZ | CSX TRANSPORTATION, INC. | | | PWRC |
| 9106 | BOZ | CSX Transportation | | | RSRV |
| 9107 | BOZ | CSX TRANSPORTATION | | | SCAC4 |
| 9108 | BOZA | BOEZEMAN OIL CO INC | | | SCAC4 |
| 9109 | BOZI | BRUNOZZI TRANSFER & TRUCK RENTAL, INC | | | SCAC3 |
| 9110 | BOZI | BRUNOZZI TRANSFER & TRUCK RENTAL IN | | | SCAC4 |
| 9111 | BOZJ | BOZEMAN, J M ENTERPRISES INC | | | SCAC4 |
| 9112 | BOZK | BROZIK, JERRY TRUCKING | | | SCAC3 |
| 9113 | BOZL | BOZEL, R. W | | | SCAC3 |
| 9114 | BOZN | BOZEMAN TRAIL TRANSPORTATION LLC | | | SCAC4 |
| 9115 | BOZO | BOYLAN MOTOR LINE | | | SCAC3 |
| 9116 | BOZR | BOZZAY ROADRUNNER DELIVERY SERVICE | | | SCAC3 |
| 9117 | BOZT | BOLZANO TOOL & DIE CO | | | SCAC4 |
| 9118 | BP | Air Botswana Corporation | ICAO: BOT, Callsign: Botswana, Name changed from Air Botswana (PTY) Ltd. | BW | AVCODES |
| 9119 | BP | Igor Brik | | CZ | VKM |
| 9120 | BP&C | Bay Point & Clayton R.R. | 4/1938-1/1946 | | NAKINA |
| 9121 | BP&C | Bay Point & Clayton R.R. | Apr-38 | | NRHS |
| 9122 | BP&C | BAY POINT & CLAYTON RAILROAD | | | PWRC |
| 9123 | BPA | Blue Panorama Airlines S.p.A. | IATA: 1I, Callsign: Blue Jet, IATA designator changed to 9S | I | AVCODES |
| 9124 | BPA | Blue Panorama Airlines S.p.A. | IATA: BV, Callsign: Blue Panorama, IATA Prefix: 004, Suspended operations on 26 October 2021. ICAO Callsign changed from Blue Jet. IATA changed from 1I, then 9S | I | AVCODES |
| 9125 | BPA | Blue Panorama Airlines S.p.A. | IATA: 9S, Callsign: Blue Jet, IATA designator changed from 1I, then to BV | I | AVCODES |
| 9126 | BPA | Blue Panorama Airlines S.p.A. | IATA: BV, Callsign: Blue Jet, IATA Prefix: 004, ICAO Callsign changed to Blue Panorama. IATA changed from 1I, then 9S | I | AVCODES |
| 9127 | BPA | Blue Panorama Airlines | IATA: BV | | ICAO1 |
| 9128 | BPA | Bahnpark Augsburg | | D | TRAFFIC |
| 9129 | BPAC | BREEN, PETER ANTIQUE AND CLASSIC BO | | | SCAC4 |
| 9130 | BPAD | BLUE POINT TRANSPORT LTD | | | SCAC4 |
| 9131 | BPAE | BPA ENTERPRISES | | | SCAC4 |
| 9132 | BPAI | BEESLEY, PHILIP ARCHITECT INC | | | SCAC4 |
| 9133 | BPAL | BP AUSTRALIA LIMITED | | | SCAC3 |
| 9134 | BPAL | BEAR PAW LUMBER CO INC | | | SCAC4 |
| 9135 | BPAQ | BURRIS-PORT ARTHUR TRANSFER & STORA | | | SCAC3 |
| 9136 | BPAT | BRESCHER, PAT TRUCKING INC | | | SCAC3 |
| 9137 | BPAT | BOB TRANSPORTATION | | | SCAC4 |
| 9138 | BPAX | U.S. Dept. of Energy, Bonneville Power Administration | added 1/1978; 1/1980-7/2005 | | NAKINA |
| 9139 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | eliminated 1/1978 | | NAKINA |
| 9140 | BPAX | Bonneville Power Administration | 4/1970-1/1975 | | NAKINA |
| 9141 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | 10/1966 | | NAKINA |
| 9142 | BPAX | Bonneville Power Administration | 7/1954-7/1965 | | NAKINA |
| 9143 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | added 1/1953 | | NAKINA |
| 9144 | BPAX | Bogalusa Paper Co., Inc. | 7/1935-7/1937 | | NAKINA |
| 9145 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | added 1/53 | | NRHS |
| 9146 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | Oct-66 | | NRHS |
| 9147 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | eliminated 1/78 | | NRHS |
| 9148 | BPAX | U.S. Dept. of Energy, Bonneville Power Administration | added 1/78; 1/80-7/2000 | | NRHS |
| 9149 | BPAX | *BOGALUSA PAPER CO. INC. | | | PWRC |
| 9150 | BPAX | +BONNEVILLE POWER ADMINISTRATION - U.S. DEPT. of ENERGY | | | PWRC |
| 9151 | BPAX | United States Department of Energy Bonneville Power Administration | | | RSRV |
| 9152 | BPAX | BONNEVILLE POWER ADMINISTRATION | | | SCAC3 |
| 9153 | BPAY | BOUNDS, PAUL T | | | SCAC4 |
| 9154 | BPAZ | ACME MARKETS, INC. | | | PWRC |
| 9155 | BPAZ | Acme Markets | | | RSRV |
| 9156 | BPAZ | ACME MARKETS, INC. | | | SCAC4 |
| 9157 | BPBS | BRIDGEPORT BUS TERMINAL | | | SCAC3 |
| 9158 | BPCB | BEAVER PACKAGING & CRATING INC | | | SCAC4 |
| 9159 | BPCI | BPC TRUCKING INC | | | SCAC4 |
| 9160 | BPCL | BROSTROM SHIPPING COMPANY, LTD. | | | SCAC3 |
| 9161 | BPCL | BAR T DIAMOND TRANSPORT LTD | | | SCAC4 |
| 9162 | BPCM | BEST PRODUCTS CO INC | | | SCAC3 |
| 9163 | BPCM | B H EXPRESS | | | SCAC4 |
| 9164 | BPCN | BROWN, C TRUCKING | | | SCAC4 |
| 9165 | BPCO | BASAPCO INC | | | SCAC3 |
| 9166 | BPCP | BAKER PETROLITE CORPORATION | | | SCAC4 |
| 9167 | BPCQ | BERGS PETROLEUM CARRIERS | | | SCAC3 |
| 9168 | BPCQ | BORING TRANSPORT INC | | | SCAC4 |
| 9169 | BPCS | BERING PACIFIC SERVICES COMPANY | | | SCAC4 |
| 9170 | BPCT | BURKE & PACE TRUCKING INC | | | SCAC3 |
| 9171 | BPCU | BSS CO.,LTD | | ROK | BIC |
| 9172 | BPCU | B P CHEMICALS BELGIUM | | | PWRC |
| 9173 | BPCU | BP Chemicals Belgium | | | RSRV |
| 9174 | BPCU | B.P. CHEMICALS BELGIUM | | | SCAC3 |
| 9175 | BPCX | Basin Electric Power Cooperative | 1/1994-7/2005 (not listed) | | NAKINA |
| 9176 | BPCX | McKesson & Robbins, Inc. | added 10/1963; eliminated 7/1965 | | NAKINA |
| 9177 | BPCX | B.P. Clapp Ammonia Co. | 8/1920-7/1923 | | NAKINA |
| 9178 | BPCX | Barada & Page, Inc. | added 4/1958; 4/1961; eliminated 10/1963 | | NAKINA |
| 9179 | BPCX | Barada & Page, Inc. | Apr-61 | | NRHS |
| 9180 | BPCX | McKesson & Robbins, Inc. | eliminated 7/65 | | NRHS |
| 9181 | BPCX | Basin Electric Power Cooperative | 1/94-7/2000 | | NRHS |
| 9182 | BPCX | *B. P. CLAPP AMMONIA CO. | | | PWRC |
| 9183 | BPCX | *BARADA & PAGE, INC. | | | PWRC |
| 9184 | BPCX | *MCKESSON & ROBBINS, INC. | | | PWRC |
| 9185 | BPCX | +BASIN ELECTRIC POWER COOPERATIVE | | | PWRC |
| 9186 | BPCX | Basin Electric Power Cooperative | | | RSRV |
| 9187 | BPCX | BASIN ELECTRIC POWER | | | SCAC4 |
| 9188 | BPCZ | BOWATER PAPER CO. | | | PWRC |
| 9189 | BPDB | BERGER/PHOENI | | | SCAC4 |
| 9190 | BPDD | B P DISTRIBUTORS LTD | | | SCAC4 |
| 9191 | BPDI | BOSTON PACKAGE DELIVERY INC | | | SCAC3 |
| 9192 | BPDL | B P D LEASE INC | | | SCAC3 |
| 9193 | BPDP | BPD TRANSPORT | | | SCAC4 |
| 9194 | BPDQ | BERMA PARCEL DELIVERY | | | SCAC3 |
| 9195 | BPDT | BARTON, PETER D TRUCKING | | | SCAC4 |
| 9196 | BPDV | BAINS, P S DEVELOPMENTS LTD | | | SCAC3 |
| 9197 | BPDX | Bordens Produce Co. (cars no. 12000-12014 and 83000-85009) (Union Refrigerator Transit Co.) | 7/1935 | | NAKINA |
| 9198 | BPDX | Bordens Produce Co. (cars no. 84370-84479) (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 9199 | BPDX | Bordens Produce Co. | | USA | TRAFFIC |
| 9200 | BPEC | BARELKOWSKI | | | SCAC4 |
