| 401 | JBE | Sinojet (Beijing) Co., Ltd | Callsign: Sino Beijing, Name changed from Jet Bear Co., Ltd | PRC | AVCODES |
| 402 | JBEB | J & B EQUIPMENT CO | | | SCAC4 |
| 403 | JBEC | JORDAN, B E TRUCKING | | | SCAC4 |
| 404 | JBED | JBS EXPEDITE LTD | | | SCAC4 |
| 405 | JBEE | J & B EXPRESS LLC | | | SCAC4 |
| 406 | JBEI | J B EXPRESS INC | | | SCAC4 |
| 407 | JBER | JG ET R BOUDREAULT INC | | | SCAC4 |
| 408 | JBFE | JBF EXPRESS INC | | | SCAC4 |
| 409 | JBFM | JBF MACHINERY MOVERS & HAULAGE LTD | | | SCAC4 |
| 410 | JBFP | JB FREIGHT TRANSPORT | | | SCAC4 |
| 411 | JBFR | JUBENVILLE FISHERIES INC | | | SCAC4 |
| 412 | JBGH | JOHNSON BROS GRAIN HAULING | | | SCAC4 |
| 413 | JBGL | J B G TRANSPORTATION LLC | | | SCAC4 |
| 414 | JBGT | JBURGOS TRANSPORT LLC | | | SCAC4 |
| 415 | JBHC | JESUIT BEND HELICOPTERS LLC | | | SCAC4 |
| 416 | JBHG | JB HAULING LLC | | | SCAC4 |
| 417 | JBHI | JOINT BROTHERS TRANSPORT INC | | | SCAC4 |
| 418 | JBHT | JBH TRUCKING INC | | | SCAC4 |
| 419 | JBHU | J. B. HUNT TRANSPORT, INC. CONTAINERS | | | PWRC |
| 420 | JBHU | J. B. Hunt Transport | | | RSRV |
| 421 | JBHU | J.B. HUNT TRANSPORT | | | SCAC4 |
| 422 | JBHX | JOHN BROWN HARRIS | | | PWRC |
| 423 | JBHZ | J. B. HUNT TRANSPORT, INC. VANS & CHASSIS | | | PWRC |
| 424 | JBHZ | J. B. Hunt Transport | | | RSRV |
| 425 | JBHZ | J B HUNT TRANSPORT INC | | | SCAC4 |
| 426 | JBHZ | J. B. Hunt Transport Inc. | | USA | TRAFFIC |
| 427 | JBIH | JEBSENS INTERNATIONAL HOLDINGS A/S | | | SCAC4 |
| 428 | JBIN | J B INDUSTRIES | | | SCAC4 |
| 429 | JBIQ | JBI INC | | | SCAC4 |
| 430 | JBIX | Tank Car Services, Inc. | added 1/1981; eliminated 1/1986 | | NAKINA |
| 431 | JBIX | Jimbetco, Inc. | added 1/1980; 1/1980; eliminated 1/1981 | | NAKINA |
| 432 | JBIX | Jimbetco, Inc. | added 1/80; 1/80; eliminated 1/81 | | NRHS |
| 433 | JBIX | Tank Car Services, Inc. | added 1/81; eliminated 1/86 | | NRHS |
| 434 | JBIX | TANK CAR SERVICES, INC. {JIMBETCO, INC.} | | | PWRC |
| 435 | JBJB | J B J BROKERAGE INC | | | SCAC4 |
| 436 | JBJR | JBJ TRUCKING | | | SCAC4 |
| 437 | JBJT | J B J TRANSFER INC | | | SCAC4 |
| 438 | JBKC | JARDEN BROTHERS TRUCKING INC | | | SCAC4 |
| 439 | JBKG | J & B TRUCKING | | | SCAC4 |
| 440 | JBKI | J & B TRUCKING | | | SCAC4 |
| 441 | JBKK | J B TRUCKING OF KALKASKA | | | SCAC4 |
| 442 | JBKO | JACOBSON, BILL TRUCKING CO INC | | | SCAC4 |
| 443 | JBKQ | J & B TRUCKING INC | | | SCAC4 |
| 444 | JBKU | SPECIALTY TRAILER LEASING INC | | USA | BIC |
| 445 | JBKU | Specialty Trailer Leasing | | | RSRV |
| 446 | JBL | Jamaica Bus Lines | | USA | TRAFFIC |
| 447 | JBLA | J B LAND-TRUCKING | | | SCAC4 |
| 448 | JBLD | JORDAN BROTHERS LOGISTICS | | | SCAC4 |
| 449 | JBLE | JUBILEE TRANSPORT INC | | | SCAC4 |
| 450 | JBLG | J & B LEASING INC | | | SCAC4 |
| 451 | JBLI | J & B LOGISTICS INC | | | SCAC4 |
| 452 | JBLR | JENSEN BROS LOGISTICS LTD | | | SCAC4 |
| 453 | JBLV | J B LIVESTOCK | | | SCAC4 |
| 454 | JBLY | JAY-BEE LOGISTICS COMPANY | | | SCAC4 |
| 455 | JBMF | JBM TRANSPORT | | | SCAC4 |
| 456 | JBMH | JBM HOLDINGS LTD | | | SCAC4 |
| 457 | JBMI | JACOBS TRANSPORTATION INC | | | SCAC4 |
| 458 | JBML | J B M LOGISTICS | | | SCAC4 |
| 459 | JBMQ | JBM TRANSPORT LLC | | | SCAC4 |
| 460 | JBMR | JBM TRANSPORT | | | SCAC4 |
| 461 | JBMX | John B. Morton | 7/1937 (not listed) | | NAKINA |
| 462 | JBMX | JOHN B. MORTON | | | PWRC |
| 463 | JBMZ | JACOBS BRANCH MINE | | | PWRC |
| 464 | JBNF | J B TRANSFER LLC | | | SCAC4 |
| 465 | JBOC | JOHNSON BROS OIL CO | | | SCAC4 |
| 466 | JBPC | J & B PARTNERS INC | | | SCAC4 |
| 467 | JBPF | J B PRODUCE FARMS SUPPLY | | | SCAC4 |
| 468 | JBPU | JAMAICA BANANA PRODUCERS STEAMSHIP | | | SCAC4 |
| 469 | JBPX | PacifiCorp Electric Operations & Idaho Power Co. —Jim Bridger Project | added 4/1991; eliminated 7/1992; 1/1994-7/2005 (not listed) | | NAKINA |
| 470 | JBPX | PacifiCorp Electric Operations & Idaho Power Co.-Jim Bridger Project | added 4/91; eliminated 7/92; 1/94-7/2000 | | NRHS |
| 471 | JBPX | PACIFICORP ELECTRIC OPERATIONS & IDAHO POWER CO. - JIM BRIDGER PROJECT | | | PWRC |
| 472 | JBPX | PacifiCorp Electric Operations and Idaho Power Jim Bridger Project | | | RSRV |
| 473 | JBPX | PACIFICORP ELECTRIC OPERATIONS | | | SCAC4 |
| 474 | JBQI | JBT LOGISTICS INC | | | SCAC4 |
| 475 | JBQS | J B QUICKSHOT TRUCKING | | | SCAC4 |
| 476 | JBQT | J & B QUARTER HORSES | | | SCAC4 |
| 477 | JBR | Job Air s.r.o. (Central Connect Airlines) | IATA: 3B, Callsign: Jobair, Ceased operations on 30 June 2014. Part of the Central Connect Group. | CZ | AVCODES |
| 478 | JBR | Job Air | | | ICAO1 |
| 479 | JBRO | J BROTHERS TRANSPORTATION INC | | | SCAC4 |
| 480 | JBRS | JONES BROTHERS TRUCKING INC | | | SCAC4 |
| 481 | JBRT | JBR TRANSPORT | | | SCAC4 |
| 482 | JBRX | Bakery Trading Co. | added 10/1994; 7/2000-7/2005 | | NAKINA |
| 483 | JBRX | Bakery Trading Co. | added 10/94; 7/2000 | | NRHS |
| 484 | JBRX | BAKERY TRADING CO. | | | PWRC |
| 485 | JBRX | Bakery Trading | | | RSRV |
| 486 | JBRX | BAKERY TRADING CO. | | | SCAC4 |
| 487 | JBS | Jet Business SA, Compagnie D'aviation D'affaires | Callsign: Jet Sky, | CH | AVCODES |
| 488 | JBSB | JBT TRANSPORT INC | | | SCAC4 |
| 489 | JBSD | J & B SERVICES INC | | | SCAC4 |
| 490 | JBSE | JACOBS ENTERPRISES LTD | | | SCAC4 |
| 491 | JBSF | J B SMOOTH TRUCKING CO | | | SCAC4 |
| 492 | JBSG | JOYCE BROS. STORAGE&VAN CO | | | SCAC1 |
| 493 | JBSG | JBS LOGISTICS INC | | | SCAC4 |
| 494 | JBSH | JBS TRANSPORTATION INC | | | SCAC4 |
| 495 | JBSI | J BAR S TRUCKING LLC | | | SCAC4 |
| 496 | JBSK | JBS TRUCKING INC | | | SCAC4 |
| 497 | JBSL | JBS LOGISTICS INC | | | SCAC4 |
| 498 | JBSN | J & B TRISTATE TRANSPORTATION INC | | | SCAC4 |
| 499 | JBSO | JACOBS OIL CO INC | | | SCAC4 |
| 500 | JBSQ | JBS MOTORSPORTS LLC | | | SCAC4 |
