| 1 | BP | Air Botswana Corporation | ICAO: BOT, Callsign: Botswana, Name changed from Air Botswana (PTY) Ltd. | BW | AVCODES |
| 2 | BP | Igor Brik | | CZ | VKM |
| 3 | BP&C | Bay Point & Clayton R.R. | 4/1938-1/1946 | | NAKINA |
| 4 | BP&C | Bay Point & Clayton R.R. | Apr-38 | | NRHS |
| 5 | BP&C | BAY POINT & CLAYTON RAILROAD | | | PWRC |
| 6 | BPA | Blue Panorama Airlines S.p.A. | IATA: 1I, Callsign: Blue Jet, IATA designator changed to 9S | I | AVCODES |
| 7 | 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 |
| 8 | BPA | Blue Panorama Airlines S.p.A. | IATA: 9S, Callsign: Blue Jet, IATA designator changed from 1I, then to BV | I | AVCODES |
| 9 | 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 |
| 10 | BPA | Blue Panorama Airlines | IATA: BV | | ICAO1 |
| 11 | BPA | Bahnpark Augsburg | | D | TRAFFIC |
| 12 | BPAC | BREEN, PETER ANTIQUE AND CLASSIC BO | | | SCAC4 |
| 13 | BPAD | BLUE POINT TRANSPORT LTD | | | SCAC4 |
| 14 | BPAE | BPA ENTERPRISES | | | SCAC4 |
| 15 | BPAI | BEESLEY, PHILIP ARCHITECT INC | | | SCAC4 |
| 16 | BPAL | BP AUSTRALIA LIMITED | | | SCAC3 |
| 17 | BPAL | BEAR PAW LUMBER CO INC | | | SCAC4 |
| 18 | BPAQ | BURRIS-PORT ARTHUR TRANSFER & STORA | | | SCAC3 |
| 19 | BPAT | BRESCHER, PAT TRUCKING INC | | | SCAC3 |
| 20 | BPAT | BOB TRANSPORTATION | | | SCAC4 |
| 21 | BPAX | U.S. Dept. of Energy, Bonneville Power Administration | added 1/1978; 1/1980-7/2005 | | NAKINA |
| 22 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | eliminated 1/1978 | | NAKINA |
| 23 | BPAX | Bonneville Power Administration | 4/1970-1/1975 | | NAKINA |
| 24 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | 10/1966 | | NAKINA |
| 25 | BPAX | Bonneville Power Administration | 7/1954-7/1965 | | NAKINA |
| 26 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | added 1/1953 | | NAKINA |
| 27 | BPAX | Bogalusa Paper Co., Inc. | 7/1935-7/1937 | | NAKINA |
| 28 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | added 1/53 | | NRHS |
| 29 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | Oct-66 | | NRHS |
| 30 | BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | eliminated 1/78 | | NRHS |
| 31 | BPAX | U.S. Dept. of Energy, Bonneville Power Administration | added 1/78; 1/80-7/2000 | | NRHS |
| 32 | BPAX | *BOGALUSA PAPER CO. INC. | | | PWRC |
| 33 | BPAX | +BONNEVILLE POWER ADMINISTRATION - U.S. DEPT. of ENERGY | | | PWRC |
| 34 | BPAX | United States Department of Energy Bonneville Power Administration | | | RSRV |
| 35 | BPAX | BONNEVILLE POWER ADMINISTRATION | | | SCAC3 |
| 36 | BPAY | BOUNDS, PAUL T | | | SCAC4 |
| 37 | BPAZ | ACME MARKETS, INC. | | | PWRC |
| 38 | BPAZ | Acme Markets | | | RSRV |
| 39 | BPAZ | ACME MARKETS, INC. | | | SCAC4 |
| 40 | BPBS | BRIDGEPORT BUS TERMINAL | | | SCAC3 |
| 41 | BPCB | BEAVER PACKAGING & CRATING INC | | | SCAC4 |
| 42 | BPCI | BPC TRUCKING INC | | | SCAC4 |
| 43 | BPCL | BROSTROM SHIPPING COMPANY, LTD. | | | SCAC3 |
| 44 | BPCL | BAR T DIAMOND TRANSPORT LTD | | | SCAC4 |
| 45 | BPCM | BEST PRODUCTS CO INC | | | SCAC3 |
| 46 | BPCM | B H EXPRESS | | | SCAC4 |
| 47 | BPCN | BROWN, C TRUCKING | | | SCAC4 |
| 48 | BPCO | BASAPCO INC | | | SCAC3 |
| 49 | BPCP | BAKER PETROLITE CORPORATION | | | SCAC4 |
| 50 | BPCQ | BERGS PETROLEUM CARRIERS | | | SCAC3 |
| 51 | BPCQ | BORING TRANSPORT INC | | | SCAC4 |
| 52 | BPCS | BERING PACIFIC SERVICES COMPANY | | | SCAC4 |
| 53 | BPCT | BURKE & PACE TRUCKING INC | | | SCAC3 |
| 54 | BPCU | BSS CO.,LTD | | ROK | BIC |
| 55 | BPCU | B P CHEMICALS BELGIUM | | | PWRC |
| 56 | BPCU | BP Chemicals Belgium | | | RSRV |
| 57 | BPCU | B.P. CHEMICALS BELGIUM | | | SCAC3 |
| 58 | BPCX | Basin Electric Power Cooperative | 1/1994-7/2005 (not listed) | | NAKINA |
| 59 | BPCX | McKesson & Robbins, Inc. | added 10/1963; eliminated 7/1965 | | NAKINA |
| 60 | BPCX | B.P. Clapp Ammonia Co. | 8/1920-7/1923 | | NAKINA |
| 61 | BPCX | Barada & Page, Inc. | added 4/1958; 4/1961; eliminated 10/1963 | | NAKINA |
| 62 | BPCX | Barada & Page, Inc. | Apr-61 | | NRHS |
| 63 | BPCX | McKesson & Robbins, Inc. | eliminated 7/65 | | NRHS |
| 64 | BPCX | Basin Electric Power Cooperative | 1/94-7/2000 | | NRHS |
| 65 | BPCX | *B. P. CLAPP AMMONIA CO. | | | PWRC |
| 66 | BPCX | *BARADA & PAGE, INC. | | | PWRC |
| 67 | BPCX | *MCKESSON & ROBBINS, INC. | | | PWRC |
| 68 | BPCX | +BASIN ELECTRIC POWER COOPERATIVE | | | PWRC |
| 69 | BPCX | Basin Electric Power Cooperative | | | RSRV |
| 70 | BPCX | BASIN ELECTRIC POWER | | | SCAC4 |
| 71 | BPCZ | BOWATER PAPER CO. | | | PWRC |
| 72 | BPDB | BERGER/PHOENI | | | SCAC4 |
| 73 | BPDD | B P DISTRIBUTORS LTD | | | SCAC4 |
| 74 | BPDI | BOSTON PACKAGE DELIVERY INC | | | SCAC3 |
| 75 | BPDL | B P D LEASE INC | | | SCAC3 |
| 76 | BPDP | BPD TRANSPORT | | | SCAC4 |
| 77 | BPDQ | BERMA PARCEL DELIVERY | | | SCAC3 |
| 78 | BPDT | BARTON, PETER D TRUCKING | | | SCAC4 |
| 79 | BPDV | BAINS, P S DEVELOPMENTS LTD | | | SCAC3 |
| 80 | BPDX | Bordens Produce Co. (cars no. 12000-12014 and 83000-85009) (Union Refrigerator Transit Co.) | 7/1935 | | NAKINA |
| 81 | BPDX | Bordens Produce Co. (cars no. 84370-84479) (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 82 | BPDX | Bordens Produce Co. | | USA | TRAFFIC |
| 83 | BPEC | BARELKOWSKI | | | SCAC4 |
| 84 | BPEE | B & P EXPRESS | | | SCAC4 |
| 85 | BPEL | BURP ENT LIMITED | | | SCAC4 |
| 86 | BPEO | BROWN, PHILLIP ELITE ONE SERVICES L | | | SCAC4 |
| 87 | BPET | B P EXPLORATION & PRODUCTION CO | | | SCAC4 |
| 88 | BPFC | BIGGS FUEL COMPANY INC | | | SCAC4 |
| 89 | BPFL | BIG PINES FREIGHT LINES | | | SCAC3 |
| 90 | BPFO | BEST PRICE FUEL OIL INC | | | SCAC4 |
| 91 | BPGA | BPG AGRONEGOCIOS SPR DE RL | | | SCAC4 |
| 92 | BPGC | BOERS, | | | SCAC4 |
| 93 | BPGV | BPG VANCOUVER | | | SCAC4 |
| 94 | BPH | Phoenix Helicopter Academy | Callsign: Black Phoenix, | GB | AVCODES |
| 95 | BPHN | BPH TRANSPORT INC | | | SCAC4 |
| 96 | BPIA | BARTLETT PETROLEUM INC | | | SCAC4 |
| 97 | BPIB | BRUCES PROPANE INC | | | SCAC4 |
| 98 | BPIC | BELL ENTERPRISES, INC | | | SCAC3 |
| 99 | BPIC | BELL ENTERPRISES INC | | | SCAC4 |
| 100 | BPID | BILLS PRODUCE INC | | | SCAC4 |