| 601 | JCDY | J C DELIVERY INC | | | SCAC4 |
| 602 | JCEI | J C EXPRESS ENTERPRISE INC | | | SCAC4 |
| 603 | JCEQ | JIMCO CONSTRUCTION & EQUIPMENT RENT | | | SCAC4 |
| 604 | JCEX | John S. Carlson and Co., Inc. | added 4/1981; eliminated 1/1986 | | NAKINA |
| 605 | JCEX | John S. Carlson and Co., Inc. | added 4/81; eliminated 1/86 | | NRHS |
| 606 | JCEX | JOHN S. CARLSON & COMPANY, INC. | | | PWRC |
| 607 | JCEX | John S. Carlson and | | | RSRV |
| 608 | JCEX | AEROSERVICIOS EJECTUTIVOS CORPORATI | | | SCAC4 |
| 609 | JCF | Jet Center Flight Training, S.A. | Callsign: Jet Center, | E | AVCODES |
| 610 | JCF | Jet Center Flight Training | | | ICAO1 |
| 611 | JCFA | JAMES, CAROLINE FINE ART STUDIO | | | SCAC4 |
| 612 | JCFI | JOHNSON, C F INC | | | SCAC4 |
| 613 | JCFM | JC FOUR (4) ME LLC | | | SCAC4 |
| 614 | JCFO | JACQUAR FUEL OIL LLC | | | SCAC4 |
| 615 | JCFS | J C FIBERS INC | | | SCAC4 |
| 616 | JCFU | NEW INTER COMERCIO E SERVICOS LTDA | | BR | BIC |
| 617 | JCFU | JC FRAGOSO REPAROS ME | | | SCAC4 |
| 618 | JCFX | J. Francesconi & Co. (General American Transportation Corp.) | 8/1920 | | NAKINA |
| 619 | JCFX | J. FRANCESCONI & CO. (GENERAL AMERICAN TRANSPORTATION CORP.) | | | PWRC |
| 620 | JCG | Japan Coast guard | | J | TRAFFIC |
| 621 | JCGS | JUST CARGO XPRESS INC | | | SCAC4 |
| 622 | JCGU | JENGCO SDN BHD | | | SCAC4 |
| 623 | JCGX | River City Leasing, Inc. | 7/2005 (not listed) | | NAKINA |
| 624 | JCGX | RIVER CITY LEASING, INC. | | | PWRC |
| 625 | JCGX | RIVER CITY LEASING INC | | | SCAC4 |
| 626 | JCH | Trading Air Cargo | Callsign: Trading Cargo, | RIM | AVCODES |
| 627 | JCH | Trading Air Cargo | | | ICAO1 |
| 628 | JCHG | JONES, CHARLES G | | | SCAC4 |
| 629 | JCHU | CHEVALLIER | | | SCAC3 |
| 630 | JCHX | J.C. Hubinger Co. (General American Tank Car Corp.) | added 11/1934 | | NAKINA |
| 631 | JCHX | J.C. HUBINGER CO. (GENERAL AMERICAN TANK CAR CORP.) | | | PWRC |
| 632 | JCI | Jordan International Air Cargo Company (JIAC) | IATA: J4, IATA Prefix: 660, | JOR | AVCODES |
| 633 | JCI | Jordan International Air Cargo | | | ICAO1 |
| 634 | JCIE | JONOCO COPIER INC | | | SCAC4 |
| 635 | JCIL | JCI LOGISTICS LLC | | | SCAC4 |
| 636 | JCIS | JS CONSULTANTS INC | | | SCAC4 |
| 637 | JCIX | Jones Chemicals, Inc. | added 7/1962; 7/1965-1/1980; eliminated 7/1984 | | NAKINA |
| 638 | JCIX | Jones Chemicals, Inc. | 7/65-1/80; eliminated 7/84 | | NRHS |
| 639 | JCIX | JONES CHEMICALS, INC. | | | PWRC |
| 640 | JCIX | Jones Chemicals | | | RSRV |
| 641 | JCJU | CASHIHOR ENTERPRISE CO LTD | | RC | BIC |
| 642 | JCK | Jackson Air Services Ltd. | Callsign: Jackson, | CDN | AVCODES |
| 643 | JCK | Jackson Air Services | | | ICAO1 |
| 644 | JCKA | JACOBS TRUCKING INC | | | SCAC4 |
| 645 | JCKG | JONES BROTHERS TRUCKING L P | | | SCAC4 |
| 646 | JCKL | JACKSON TRUCKING | | | SCAC4 |
| 647 | JCKM | JAMES, CECIL TRUCKING | | | SCAC4 |
| 648 | JCKN | JACKSON MOVING & STORAGE INC | | | SCAC4 |
| 649 | JCKO | JACKSON TRUCKING CO | | | SCAC1 |
| 650 | JCKO | JACKSON INTERNATIONAL LTD | | | SCAC4 |
| 651 | JCKR | JACKSON TRANSPORTATION | | | SCAC4 |
| 652 | JCL | Jet Cargo-Liberia | | LB | AVCODES |
| 653 | JCL | Jetcall GmbH & Co. KG. | Callsign: Jetcall, | D | AVCODES |
| 654 | JCLB | JGS CARRIERS LLC | | | SCAC4 |
| 655 | JCLC | J T C LLC | | | SCAC4 |
| 656 | JCLL | JUNCOS COMPETICION LLC | | | SCAC4 |
| 657 | JCLM | JCL INC | | | SCAC4 |
| 658 | JCLR | JONES CONCRETE LLC | | | SCAC4 |
| 659 | JCLS | JC LOGISTICS (USA) INC | | | SCAC4 |
| 660 | JCLV | JOHN CHANCE LAND SURVEYS | | | SCAC4 |
| 661 | JCLX | Mid-Am Equipment, Inc. | added 7/1979; 1/1980; eliminated 10/1984; added 10/1993; 1/1994; eliminated 7/1995; 7/2000-7/2005 (not listed); eliminated 7/2008 | | NAKINA |
| 662 | JCLX | Jaffe Car Lines, Inc. | added 10/1977; eliminated 7/1979 | | NAKINA |
| 663 | JCLX | Jaffe Car Lines, Inc. | eliminated 7/79 | | NRHS |
| 664 | JCLX | Mid-Am Equipment, Inc. | added 7/79; 1/80; eliminated 10/84; added 10/93; 1/94; eliminated 7/95; 7/2000 | | NRHS |
| 665 | JCLX | MID-AM EQUIPMENT, INC. {JAFFE CAR LINES, INC.] | | | PWRC |
| 666 | JCLX | Mid-Am Equipment | | | RSRV |
| 667 | JCLX | MID-AM EQUIPMENT INC | | | SCAC4 |
| 668 | JCM | Secure Air Charter, LLC | Callsign: Secureair, | USA | AVCODES |
| 669 | JCM | Secure Air Charter | | | ICAO1 |
| 670 | JCMF | JCM FREIGHT SYSTEMS INC | | | SCAC4 |
| 671 | JCMI | J C M TRANSPORT INC | | | SCAC4 |
| 672 | JCML | JCM LOGISTICS INC | | | SCAC4 |
| 673 | JCMM | J AND CM TRANSPORT INC | | | SCAC4 |
| 674 | JCMR | J C M R FREIGHT FORWARDERS | | | SCAC4 |
| 675 | JCMX | James C. McCanless | added 4/1978; 1/1980; eliminated 4/1988 | | NAKINA |
| 676 | JCMX | James C. McCanless | added 4/78; 1/80; eliminated 4/88 | | NRHS |
| 677 | JCMX | JAMES C. McCANLESS | | | PWRC |
| 678 | JCMX | James C. McCanless | | | RSRV |
| 679 | JCNI | JONELL CANADA INC | | | SCAC4 |
| 680 | JCNX | DIAMOND CROSSING ENTERPRISES, LLC | | | PWRC |
| 681 | JCNX | DIAMOND CROSSING ENTERPRISES LLC | | | SCAC4 |
| 682 | JCO | Concierge U Limited t/a Jet Concierge Club Ltd | Callsign: Concierge, | GB | AVCODES |
| 683 | JCOC | JACKSON COUNTY OIL CO INC | | | SCAC4 |
| 684 | JCOL | JACK COLE COMPANY | | | PWRC |
| 685 | JCOM | JOELSCARZ.COM | | | SCAC4 |
| 686 | JCOP | JASMIN CORP | | | SCAC4 |
| 687 | JCOR | JADCORE TRUCKING INC | | | SCAC4 |
| 688 | JCOS | JC TOURS INC | | | SCAC4 |
| 689 | JCOT | JC ON THE MOVE INC | | | SCAC4 |
| 690 | JCOX | Jordan Co. | 4/1947 (not listed); 1/1950-4/1970; eliminated 4/1971 | | NAKINA |
| 691 | JCOX | Jordan Co. | 1/52-4/70; eliminated 4/71 | | NRHS |
| 692 | JCOX | JORDAN CO. | | | PWRC |
| 693 | JCP | Jetcopter | Callsign: Jetcopter, | DK | AVCODES |
| 694 | JCPD | JC PRODUCE CORP | | | SCAC4 |
| 695 | JCPP | J C PROPANE | | | SCAC4 |
| 696 | JCPS | J C POTTER SAUSAGE CO | | | SCAC4 |
| 697 | JCPT | JCP LOGISTICS L P | | | SCAC4 |
| 698 | JCPZ | J. C. PENNY | | | PWRC |
| 699 | JCR | Rotterdam Jet Center | Callsign: Rotterdam Jetcenter, | NL | AVCODES |
| 700 | JCR | Rotterdam Jet Center | | | ICAO1 |
