| 6001 | BKOC | BROOKS COACH | | | SCAC3 |
| 6002 | BKOC | BECK OIL CO | | | SCAC4 |
| 6003 | BKOE | BARKO ENTERPRISES INC | | | SCAC4 |
| 6004 | BKOI | BROOKS OIL COMPANY INC | | | SCAC3 |
| 6005 | BKOL | BRAUNKOHLE TRANSPORT CANADA INC | | | SCAC3 |
| 6006 | BKOM | BURKE OIL COMPANY, INC | | | SCAC4 |
| 6007 | BKON | BROTAKER TOURS INC | | | SCAC3 |
| 6008 | BKON | BELOKON TRANSIT LLC | | | SCAC4 |
| 6009 | BKOP | BROOKS OIL COMPANY INC | | | SCAC4 |
| 6010 | BKOQ | BAKER, RON | | | SCAC3 |
| 6011 | BKOQ | B & K TRANSPORT INC | | | SCAC4 |
| 6012 | BKOR | BOSKO TRANSPORT INC | | | SCAC4 |
| 6013 | BKOV | BARKERS OIL SERVICE | | | SCAC4 |
| 6014 | BKOY | BLACK OIL COMPANY INC | | | SCAC4 |
| 6015 | BKP | Bangkok Airways Co. Ltd. | IATA: PG, Callsign: Bangkok Air, IATA Prefix: 829, | T | AVCODES |
| 6016 | BKP | Bangkok Airways | IATA: PG | | ICAO1 |
| 6017 | BKPA | BULK TRADE AND TRANSPORT INC | | | SCAC3 |
| 6018 | BKPC | BROCKIE TRANSPORTATION INC | | | SCAC3 |
| 6019 | BKPD | BRAKEMAN PRODUCTS | | | SCAC3 |
| 6020 | BKPD | BAKERSTREE | | | SCAC4 |
| 6021 | BKPE | BERKLY ENTERPRISES INC | | | SCAC4 |
| 6022 | BKPG | BULKSHIP (NIGERIA) LTD | | | SCAC3 |
| 6023 | BKPI | B K TRANSPORTATION INC | | | SCAC3 |
| 6024 | BKPL | BULKERS SRL | | | SCAC4 |
| 6025 | BKPN | BUCKS TRANSPORTATION | | | SCAC3 |
| 6026 | BKPO | BUCKEYE PRO | | | SCAC3 |
| 6027 | BKPP | BULK SHIPPING INC, AGENTS | | | SCAC3 |
| 6028 | BKPS | BUNKER EXPRESS | | | SCAC4 |
| 6029 | BKPT | BELKNAP, D L TRUCKING INC | | | SCAC3 |
| 6030 | BKPV | BAKERS TRANSPORTATION SERVICE | | | SCAC3 |
| 6031 | BKPW | BLACK PAWS TRANSPORT | | | SCAC4 |
| 6032 | BKQE | BAKER EXCAVATING | | | SCAC3 |
| 6033 | BKQG | BLACKS TRUCKING | | | SCAC4 |
| 6034 | BKQL | BECK OIL CO | | | SCAC4 |
| 6035 | BKQM | BENS TRUCK & EQUIPMENT | | | SCAC4 |
| 6036 | BKQO | BARKER OIL COMPANY | | | SCAC4 |
| 6037 | BKQR | B & R TRANSPORTATION SERVICES | | | SCAC3 |
| 6038 | BKQS | BRINKS LIMOUSINE SERVICE | | | SCAC3 |
| 6039 | BKQT | BRINK TRUCKING COMPANY | | | SCAC3 |
| 6040 | BKR | Civil Air Patrol, South Carolina Wing | Callsign: Box Kar, | USA | AVCODES |
| 6041 | BKR | Civil Air Patrol South Carolina Wing | | | ICAO1 |
| 6042 | BKRA | BECKER CORPORATION | | | SCAC3 |
| 6043 | BKRB | BRICKER TRUCKING LTD | | | SCAC4 |
| 6044 | BKRC | BKRS INC | | | SCAC3 |
| 6045 | BKRC | BEDFORD, KENNETH R | | | SCAC4 |
| 6046 | BKRD | BLACK, R A & SON TRUCKING | | | SCAC3 |
| 6047 | BKRD | BAKER TRANSPORTATION SERVICES | | | SCAC4 |
| 6048 | BKRE | BAKER TRANSPORTATION | | | SCAC3 |
| 6049 | BKRF | BAKER FARMS TRUCKING | | | SCAC3 |
| 6050 | BKRG | BAKERS GARAGE | | | SCAC3 |
| 6051 | BKRH | BAKER, CHARLES TRUCKING | | | SCAC4 |
| 6052 | BKRI | BAKER, R INC | | | SCAC4 |
| 6053 | BKRJ | BAKER, JIM, TRUCKING | | | SCAC3 |
| 6054 | BKRJ | BAKER, R & J TRUCKING INC | | | SCAC4 |
| 6055 | BKRL | BAKER TRUCK LINES INC | | | SCAC3 |
| 6056 | BKRL | BAKER, C H LLC | | | SCAC4 |
| 6057 | BKRM | BAKER MOVING & STORAGE | | | SCAC3 |
| 6058 | BKRN | BARKER, RON INC | | | SCAC3 |
| 6059 | BKRN | BRECKS TRANSPORT | | | SCAC4 |
| 6060 | BKRO | BAKER TRUCKING SERVICE | | | SCAC3 |
| 6061 | BKRP | BARK RIVER TRANSIT INC | | | SCAC3 |
| 6062 | BKRQ | BARKERS TRANSFER | | | SCAC3 |
| 6063 | BKRQ | BARSKI, ROMAN TRANSPORT US LLC | | | SCAC4 |
| 6064 | BKRR | Batten Kill R.R. Co., Inc. | 7/2000-7/2005 | | NAKINA |
| 6065 | BKRR | Batten Kill R.R. Co. | eliminated 4/1992; 1/1994 | | NAKINA |
| 6066 | BKRR | Batten Kill R.R. Co., Inc. | added 10/1982; eliminated 1/1987 | | NAKINA |
| 6067 | BKRR | Batten Kill R.R. Co., Inc. | added 10/82; eliminated 1/87 | | NRHS |
| 6068 | BKRR | Batten Kill R.R. Co. | eliminated 4/92; 1/94 | | NRHS |
| 6069 | BKRR | Batten Kill R.R. Co., Inc. | Jul-00 | | NRHS |
| 6070 | BKRR | BATTEN KILL RAILROAD CO. | | | PWRC |
| 6071 | BKRR | Batten Kill Railroad | | | RSRV |
| 6072 | BKRR | BATTEN KILL RAILROAD INC | | | SCAC3 |
| 6073 | BKRS | BUCK RUN TRANSPORT CO | | | SCAC3 |
| 6074 | BKRS | BRT INC | | | SCAC4 |
| 6075 | BKRT | BAKER TANKS INC | | | SCAC4 |
| 6076 | BKRU | BAKER TANKS | | | PWRC |
| 6077 | BKRU | Baker Tanks | | | RSRV |
| 6078 | BKRU | BAKER TANKS | | | SCAC4 |
| 6079 | BKRV | BACK RIVER TRANSPORT INC | | | SCAC3 |
| 6080 | BKRW | BAKER TRANSPORTS CO INC | | | SCAC3 |
| 6081 | BKRW | BURKHART TRANSPORTATION | | | SCAC4 |
| 6082 | BKRY | BARTEL, KERRY | | | SCAC4 |
| 6083 | BKS | Aviaexpress Cruise, Joint-Stock Company | Callsign: Aviacruise, | RUS | AVCODES |
| 6084 | BKS | Atlantic Coast Aircraft Services, Inc. | Callsign: Berks, Established in 1997. ICAO designator changed to BKS. ICAO callsign changed to Berks. | USA | AVCODES |
| 6085 | BKSB | BLAZER, KENNY SCHOOL BUS TRANSPORTA | | | SCAC3 |
| 6086 | BKSB | BRKS AUTO | | | SCAC4 |
| 6087 | BKSC | BARKS TRUCKING CO | | | SCAC3 |
| 6088 | BKSD | BERKS PRODUCTS CORPORATION | | | SCAC4 |
| 6089 | BKSE | BLACKSTONE TRUCKING | | | SCAC4 |
| 6090 | BKSF | BLICKENSTAFF, LEROY | | | SCAC3 |
| 6091 | BKSG | BEKAERT SOLUTIONS DE CARDAGE INC | | | SCAC4 |
| 6092 | BKSH | BULK SHIPPERS TRANSPORT | | | SCAC3 |
| 6093 | BKSI | BECKS TRANSFER INC | | | SCAC3 |
| 6094 | BKSI | BRACKS TRANSPORT TRUCKING INC | | | SCAC4 |
| 6095 | BKSK | BUCKS TRUCKING | | | SCAC3 |
| 6096 | BKSK | BOOK, S TRUCKING INC | | | SCAC4 |
| 6097 | BKSL | BLACKSBURG LIMOUSINE SERVICE | | | SCAC3 |
| 6098 | BKSL | BAKKEN, STEVEN L | | | SCAC4 |
| 6099 | BKSM | BUCKS MOVING & STORAGE | | | SCAC3 |
| 6100 | BKSM | BERNARD, K & S INVESTMENTS INC | | | SCAC4 |
