| 1 | KLL | Klickitat Log and Lumber (St. Regis Paper Co.) | | | RSRV |
| 2 | KLLC | KELTRANS LLC | | | SCAC4 |
| 3 | KLLD | KELLYS DELIVERY SERVICE | | | SCAC3 |
| 4 | KLLF | KELLY FARMS | | | SCAC3 |
| 5 | KLLF | K & L LOGISTICS INC | | | SCAC4 |
| 6 | KLLG | KNITNEY LINES LOGISTICS INC | | | SCAC4 |
| 7 | KLLH | KLM LOGISTICS LLC | | | SCAC4 |
| 8 | KLLI | KELLY INC | | | SCAC3 |
| 9 | KLLJ | KELLY, JAMES | | | SCAC4 |
| 10 | KLLL | KLENSKE, L L LOGISTICS | | | SCAC4 |
| 11 | KLLM | KENT LINE LIMITED | | | SCAC3 |
| 12 | KLLM | KENT LINE LIMITED | | | SCAC4 |
| 13 | KLLN | KELLNERS FIREWORKS INC | | | SCAC4 |
| 14 | KLLP | KELLEY, PAUL | | | SCAC3 |
| 15 | KLLP | KL LOGISTIC CORPORATION | | | SCAC4 |
| 16 | KLLQ | KELLER, JOHN F | | | SCAC3 |
| 17 | KLLR | KELLER TRANSPORT, INC. | | | SCAC3 |
| 18 | KLLS | KALLISHIP CO LTD | | | SCAC4 |
| 19 | KLLT | KLLM TRANSPORT SERVICES LLC | | | SCAC4 |
| 20 | KLLV | KNOLLMAN, ELVIN L INC | | | SCAC3 |
| 21 | KLLVA | Luchtvaartafdeeling der Koninklijke Landmacht | Real: LVA, The Aviation Department of the Royal Netherlands Army (LVA) was the forerunner of the Dutch Royal Netherlands Air Force. | NL | TRAFFIC |
| 22 | KLLW | KHA LOGISTICS LLC | | | SCAC4 |
| 23 | KLLX | TUCO, Inc. | eliminated 1/2004 | | NAKINA |
| 24 | KLLX | TUCO Inc. | 7/2005 (not listed) | | NAKINA |
| 25 | KLLX | TUCO, INC. | | | PWRC |
| 26 | KLLX | TUCO INC | | | SCAC4 |
| 27 | KLLY | KELLEY, GRAFTON | | | SCAC3 |
| 28 | KLLY | KELLYCO | | | SCAC4 |
| 29 | KLLZ | KONE LANDELL LEAD | | | PWRC |
