| 1701 | JKCX | JARECKI CHEMICAL CO. | | | PWRC |
| 1702 | JKDG | JONES, RANDY TRUCKING | | | SCAC4 |
| 1703 | JKDT | JOSKI, DENNIS TRUCKING LLC | | | SCAC4 |
| 1704 | JKDU | CMLT CONTAINER MANAGEMENT GMBH | | | SCAC3 |
| 1705 | JKDW | JACKSON DAWSON MOTORSPORTS INC | | | SCAC4 |
| 1706 | JKEA | J & K EXPRESS INC | | | SCAC4 |
| 1707 | JKEC | JONES TRUCK BROKERS | | | SCAC4 |
| 1708 | JKEG | JACKSON ENERGY LLC | | | SCAC4 |
| 1709 | JKEL | JORDAN, KC ENTERPRISE LLC | | | SCAC4 |
| 1710 | JKEN | HG JENKINS CONSTRUCTION INC | | | SCAC4 |
| 1711 | JKEO | JK & E TRANSPORT LLC | | | SCAC4 |
| 1712 | JKEQ | JKB ENTERPRISES TRANSPORTATION LLC | | | SCAC4 |
| 1713 | JKEV | JEWELL, KIRK EXCAVATING | | | SCAC4 |
| 1714 | JKFC | JACKSON FUEL CORP | | | SCAC4 |
| 1715 | JKFF | JackRabbit Fast Freight Corp [1] | | | SCAC2 |
| 1716 | JKFF | JACKRABBIT FAST FREIGHT CORP | | | SCAC4 |
| 1717 | JKFH | J K FAST FREIGHT | | | SCAC4 |
| 1718 | JKFK | JAKES FIREWORKS INC | | | SCAC4 |
| 1719 | JKFM | JACKSONS FARMING CO OF AUTRYVILLE | | | SCAC4 |
| 1720 | JKFS | JK FARMS & TRUCKING INC | | | SCAC4 |
| 1721 | JKFT | J K FUEL TRANSPORTER INC | | | SCAC4 |
| 1722 | JKG | Air Jet | Callsign: Frunze, | KZ | AVCODES |
| 1723 | JKGA | JACKSON, GARY TRANSPORTATION LTD | | | SCAC4 |
| 1724 | JKGL | JOANNS TRUCKING LLC | | | SCAC4 |
| 1725 | JKGR | J & K GROWERS | | | SCAC4 |
| 1726 | JKH | JK Jetkontor AG | Callsign: Jetkontor, | D | AVCODES |
| 1727 | JKJN | JKJ TRUCKING | | | SCAC4 |
| 1728 | JKJR | JACK JR EXPRESS INC | | | SCAC4 |
| 1729 | JKK | Spanair, S.A. | IATA: JK, Callsign: Spanair, IATA Prefix: 680, Founded in 1986. Ceased operations on 27 January 2012. ICAO designator changed from SPP | E | AVCODES |
| 1730 | JKK | Spanair | IATA: JK | | ICAO1 |
| 1731 | JKK | Spanair | | E | TRAFFIC |
| 1732 | JKKT | JACKS TRUCKING | | | SCAC4 |
| 1733 | JKL | J.K. Line, Inc. | 1/1994-7/2005 | | NAKINA |
| 1734 | JKL | J.K. Line, Inc. | 1/94-7/2000 | | NRHS |
| 1735 | JKL | J. K. LINE, INC. | | | PWRC |
| 1736 | JKL | J.K. Line | | | RSRV |
| 1737 | JKL | J K LINE INC | | | SCAC4 |
| 1738 | JKL | Jan Klein | | D | TRAFFIC |
| 1739 | JKLC | JK LOGISTICS LLC | | | SCAC4 |
| 1740 | JKLI | JONICK- LOPEZ INTERNATIONAL TRANSPO | | | SCAC4 |
| 1741 | JKLL | JKL TRANSPORTATION LLC | | | SCAC4 |
| 1742 | JKLM | JK LOGISTICS LLC | | | SCAC4 |
| 1743 | JKLO | JOHNSON, KEN LOGISTICS LLC | | | SCAC4 |
| 1744 | JKLT | J & K LOBSTER BAIT INC | | | SCAC4 |
| 1745 | JKMD | JKM DAVIS TRANSPORTATION LLC | | | SCAC4 |
| 1746 | JKMK | JENKINS, MARIO TRUCKING INC | | | SCAC4 |
| 1747 | JKML | JACKMAN LUMBER | | | SCAC4 |
| 1748 | JKMS | JK MOVING & STORAGE INC | | | SCAC4 |
| 1749 | JKMT | JONKMAN EQUIPMENT LTD | | | SCAC4 |
| 1750 | JKMW | JK MARITIME CO LTD | | | SCAC4 |
| 1751 | JKN | KSA Charters Ltd. d/b/a Junkanoo Air | Callsign: Junkanoo Air, | BS | AVCODES |
| 1752 | JKNB | JACK IN THE BOX INC | | | SCAC4 |
| 1753 | JKND | JACKSON & SON DISTRIBUTORS INC | | | SCAC4 |
| 1754 | JKNG | J & A TRUCKING INC | | | SCAC4 |
| 1755 | JKNL | JAS-KIRAN TRUCKING LTD | | | SCAC4 |
| 1756 | JKNP | J & K TRANSPORT | | | SCAC4 |
| 1757 | JKOB | JACKS OIL DISTRIBUTING | | | SCAC4 |
| 1758 | JKOC | JACKSON OIL COMPANY | | | SCAC4 |
| 1759 | JKOD | JACKSON, ODIE TRUCKING INC | | | SCAC4 |
| 1760 | JKOI | JACKSON OIL | | | SCAC4 |
| 1761 | JKOY | Pääkaupunkiseudun Junakalusto Oy | | FI | VKM |
| 1762 | JKPY | JK PLAYER SPORTS | | | SCAC4 |
| 1763 | JKR | Empire Airways | Callsign: Joker, Established in 2004. Ceased operations in 2012. Wholly owned by Partner Aviation Enterprises. | USA | AVCODES |
| 1764 | JKR | Reliant Aviation d/b/a Justice Air Charter | Callsign: Joker, Name changed to Justice Air Charter. | USA | AVCODES |
| 1765 | JKR | Justice Air Charter | Callsign: Joker, Name changed to Justice Air, Inc. Name changed from Reliant Aviation d/b/a Justice Air Charter. | USA | AVCODES |
| 1766 | JKR | Justice Air, Inc. | Callsign: Joker, Name changed from Justice Air Charter. Name changed from Reliant Aviation d/b/a Justice Air Charter. | USA | AVCODES |
| 1767 | JKRO | JOHNSON, KARL R TRUCKING INC | | | SCAC4 |
| 1768 | JKRS | J K TRANSPORT INC | | | SCAC4 |
| 1769 | JKSB | JACKS BAIT DISTRIBUTORS | | | SCAC4 |
| 1770 | JKSC | JAKAIT EXPRESS INC | | | SCAC4 |
| 1771 | JKSE | JACKSON, SAMMY ENTERPRISES INC | | | SCAC4 |
| 1772 | JKSI | JACKSON TRUCKING COMPANY INC | | | SCAC4 |
| 1773 | JKSL | JACKSON ENTERPRISES LLC | | | SCAC4 |
| 1774 | JKSM | JKS MOTORSPORTS OPERATIONS LLC | | | SCAC4 |
| 1775 | JKSO | JACKS TOWING | | | SCAC4 |
| 1776 | JKSR | JK TRANSPORT EXPRESS INC | | | SCAC4 |
| 1777 | JKSV | J & KS SERVICE LLC | | | SCAC4 |
| 1778 | JKT | Jetstar Hong Kong Airways Limited | Callsign: Kaitak, | HK | AVCODES |
| 1779 | JKTA | J K TRANSPORTATION | | | SCAC4 |
| 1780 | JKTC | J & K TRUCKING CO | | | SCAC4 |
| 1781 | JKTD | J & K TRUCKING | | | SCAC4 |
| 1782 | JKTE | J & K TRUCKING INC | | | SCAC4 |
| 1783 | JKTG | J & K TRUCKING | | | SCAC4 |
| 1784 | JKTH | J & K TRANSPORTATION INC | | | SCAC4 |
| 1785 | JKTI | JIRAK TRUCKING INC | | | SCAC4 |
| 1786 | JKTK | J K TRUCKING | | | SCAC4 |
| 1787 | JKTM | J & K TRANS | | | SCAC4 |
| 1788 | JKTO | J & K TRANSPORTATION | | | SCAC4 |
| 1789 | JKTT | J K H TRANSPORT LTD | | | SCAC4 |
| 1790 | JKTU | Icor International | | | RSRV |
| 1791 | JKTU | ICOR INTERNATIONAL INC | | | SCAC4 |
| 1792 | JKTV | J K TRANSPORTATION SERVICES INC | | | SCAC4 |
| 1793 | JKTY | J & K TRUCKING OF SPEARSVILLE LLC | | | SCAC4 |
| 1794 | JKVN | JK VAN LINES INC | | | SCAC4 |
| 1795 | JKWI | Johnsonburg, Kane, Warren & Irvine R.R. Co. | added 10/1982; eliminated 10/1985 | | NAKINA |
| 1796 | JKWI | Johnsonburg, Kane, Warren & Irvine R.R. Co. | added 10/82 | | NRHS |
| 1797 | JKWI | JOHNSONBURG, KANE, WESTERN & IRVINE RAILROAD | | | PWRC |
| 1798 | JKWI | Johnsonburg, Kane, Warren and Irvine Railroad | | | RSRV |
| 1799 | JKWI | JK WORLDWIDE INC | | | SCAC4 |
| 1800 | JKXC | J & K TRANSPORT COMPANY INCORPORATE | | | SCAC4 |
