| 12201 | BUGU | BUGSIER REEDERI UNG BERGUNGS GESELL | | | SCAC3 |
| 12202 | BUGX | Bruggere & Monson | 7/2000 (not listed) | | NAKINA |
| 12203 | BUGX | Bruggere & Monson | Jul-00 | | NRHS |
| 12204 | BUGX | *BRUGGERE & MONSON | | | PWRC |
| 12205 | BUGX | +DIESELMOTIVE COMPANY, INC. | | | PWRC |
| 12206 | BUGX | Bruggere and Monson | | | RSRV |
| 12207 | BUGX | DIESELMOTIVE COMPANY INC | | | SCAC4 |
| 12208 | BUH | BUNKER HILL | | | PWRC |
| 12209 | BUHA | BUCHTA, ELMER TRUCKING INC | | | SCAC3 |
| 12210 | BUHB | BUSCHBOM, JAMES L | | | SCAC3 |
| 12211 | BUHC | BUHR, S B | | | SCAC3 |
| 12212 | BUHE | BUCHTA, ELMER INC | | | SCAC3 |
| 12213 | BUHG | BURKHALTER TRUCKING | | | SCAC3 |
| 12214 | BUHI | BULK HAULERS INC | | | SCAC3 |
| 12215 | BUHJ | BUSCH, JOHN | | | SCAC3 |
| 12216 | BUHK | BUNCH, KEN TRUCKING INC | | | SCAC3 |
| 12217 | BUHL | BUHL-TWIN FALLS TRUCK LINES, INC | | | SCAC3 |
| 12218 | BUHL | BUHLER, JOHN INC | | | SCAC4 |
| 12219 | BUHM | BUNCH, M C INC | | | SCAC3 |
| 12220 | BUHN | BUCHANAN, HERMAN | | | SCAC3 |
| 12221 | BUHQ | BURROUGHS TRUCKING CO | | | SCAC3 |
| 12222 | BUHQ | BURROUGHS TRUCKING CO | | | SCAC4 |
| 12223 | BUHR | BUEHLER, P & E TRUCKING | | | SCAC3 |
| 12224 | BUHS | BURRELL HAULING SERVICE | | | SCAC3 |
| 12225 | BUHS | BUHS FARMS TRUCKING | | | SCAC4 |
| 12226 | BUHT | BURNHAM TRUCKING COMPANY INC | | | SCAC3 |
| 12227 | BUHV | BUSH, RON TRUCKING | | | SCAC3 |
| 12228 | BUHW | BURNHAM, WILLIAM E | | | SCAC3 |
| 12229 | BUHY | BUHRE, LE-ROY | | | SCAC3 |
| 12230 | BUIA | BUILDERS TRANSPORTATION COMPANY | | | SCAC3 |
| 12231 | BUIA | BUILDERS TRANSPORTATION CO LLC | | | SCAC4 |
| 12232 | BUIC | BRAUNER INTERNATIONAL CORPORATION | | | SCAC4 |
| 12233 | BUID | BURLINGAME INDUSTRIES INCORPORATED | | | SCAC3 |
| 12234 | BUID | BENAVIDES GUERRA, LIDIA ISABEL | | | SCAC4 |
| 12235 | BUIE | BUIE TRUCKING INC | | | SCAC4 |
| 12236 | BUIG | BRUNING | | | SCAC3 |
| 12237 | BUIG | BUTTS IN GEAR | | | SCAC4 |
| 12238 | BUII | BURTSCHI TRANSPORT INC | | | SCAC3 |
| 12239 | BUIK | BURKE OIL INC | | | SCAC4 |
| 12240 | BUIN | BURDINE, LAWTON | | | SCAC3 |
| 12241 | BUIO | BURGIO A TRUCKING CO INC | | | SCAC3 |
| 12242 | BUIQ | BUILDERS TRANSIT TRUCKING & SUPPLY | | | SCAC3 |
| 12243 | BUIR | BUIE, ARTHUR TRUCKING COMPANY | | | SCAC3 |
| 12244 | BUIS | BUIS TRUCKING | | | SCAC3 |
| 12245 | BUIT | BUILDERS TRANSPORT INC | | | SCAC3 |
| 12246 | BUIU | BUCHEN-ICS GMBH | | | SCAC4 |
| 12247 | BUIV | BURSIEK TRUCK SERVICES INC | | | SCAC3 |
| 12248 | BUIW | BUNCHS INC | | | SCAC3 |
| 12249 | BUJ | Borås - Ulricehamn Järnväg | 1917 - 1940 | S | svenska-lok.se |
| 12250 | BUJE | BURK, JOSEPH E | | | SCAC3 |
| 12251 | BUJE | BLU-J EXPRESS LLC | | | SCAC4 |
| 12252 | BUJH | BUTLER, J & SONS HAULING INC | | | SCAC4 |
| 12253 | BUJJ | BURANIS, JOHN J CONSTRUCTION INC | | | SCAC3 |
| 12254 | BUJN | BUCKLE JOHN | | | SCAC4 |
| 12255 | BUJT | BURTON, J J TRUCKING INC | | | SCAC3 |
| 12256 | BUK | Buckley Air Ltd. | Callsign: Buckley, | NZ | AVCODES |
| 12257 | BUK | Bbdorf & Kerstan GmbH | | DE | VKM |
| 12258 | BUKA | BULK SPECIALTIES INC | | | SCAC3 |
| 12259 | BUKA | BULK ATLANTIC INC | | | SCAC4 |
| 12260 | BUKB | BEST TRUCKING LLC | | | SCAC4 |
| 12261 | BUKD | BUCKS TRUCKS | | | SCAC3 |
| 12262 | BUKD | BOND TRUCKING SA DE CV | | | SCAC4 |
| 12263 | BUKE | BURKE MOVING & STORAGE INC | | | SCAC3 |
| 12264 | BUKF | BUCKHURST SHIPPING COMPANY | | | SCAC3 |
| 12265 | BUKG | BUCKEYE TRUCKING COMPANY INC | | | SCAC3 |
| 12266 | BUKG | BARTON TRUCKING | | | SCAC4 |
| 12267 | BUKH | BULK HAULERS INC | | | SCAC3 |
| 12268 | BUKI | BUCK TRUCKING CO | | | SCAC3 |
| 12269 | BUKI | BUTLER TRUCKING INC | | | SCAC4 |
| 12270 | BUKJ | BUCKO INC | | | SCAC3 |
| 12271 | BUKK | BUCKS TRUCKS INC | | | SCAC3 |
| 12272 | BUKL | BULK TANKER MANAGEMENT LIMITED | | | SCAC3 |
| 12273 | BUKL | BUCKLIN TRACTOR | | | SCAC4 |
| 12274 | BUKM | B & R TRUCKING | | | SCAC4 |
| 12275 | BUKN | BUK TRUCKING, INC | | | SCAC3 |
| 12276 | BUKO | BUCKO TRUCKING | | | SCAC3 |
| 12277 | BUKP | BUCKS INC | | | SCAC3 |
| 12278 | BUKP | BUCKS INC | | | SCAC4 |
| 12279 | BUKQ | BURKE, PHILIP | | | SCAC3 |
| 12280 | BUKQ | BEAR TRUCKING LLC | | | SCAC4 |
| 12281 | BUKR | BULK CARRIERS INC | | | SCAC3 |
| 12282 | BUKS | BUCKS TRUCKING | | | SCAC4 |
| 12283 | BUKU | BERTSCHI AG | | CH | BIC |
| 12284 | BUKU | BULKTAINER RENTAL AND FINANCE LTD | | | SCAC4 |
| 12285 | BUKV | BUCKO VAN LINES INC | | | SCAC3 |
| 12286 | BUKW | BUNCE TRUCKING LLC | | | SCAC4 |
| 12287 | BUKX | Louisville Gas and Electric Co. | added 7/1989; 1/1994-7/2005 | | NAKINA |
| 12288 | BUKX | General American Transportation Corp. | added 1/1988 | | NAKINA |
| 12289 | BUKX | General American Transportation Corp. | added 1/88 | | NRHS |
| 12290 | BUKX | Louisville Gas and Electric Co. | added 7/89; 1/94-7/2000 | | NRHS |
| 12291 | BUKX | LOUISVILLE GAS AND ELECTRIC COMPANY (GENERAL AMERICAN TRANSPORTATION CORP.) | | | PWRC |
| 12292 | BUKX | Louisville Gas and Electric | | | RSRV |
| 12293 | BUKX | LOUISVILLE GAS AND ELECTRIC COMPANY | | | SCAC4 |
| 12294 | BUKY | BUCKLEYS DISTRIBUTING COMPANY | | | SCAC3 |
| 12295 | BUL | Blue Airlines | Callsign: Blue Airlines, | ZRE | AVCODES |
| 12296 | BUL | Blue Airlines | | | ICAO1 |
| 12297 | BULA | BULLARD TRANSPORT | | | SCAC4 |
| 12298 | BULB | BLUE LINES INC, | | | SCAC3 |
| 12299 | BULC | BULL TRUCK | | | SCAC4 |
| 12300 | BULD | BULK EXPRESS, INC | | | SCAC3 |
