| 1 | KRC | New Zealand Air Defence Force | Callsign: Kiwi Rescue, | NZ | AVCODES |
| 2 | KRC | New Zealand Air Defence Force | | | ICAO1 |
| 3 | KRC | KEEWATIN RAILWAY COMPANY | | | SCAC4 |
| 4 | KRCA | KETTLE RIVER CANOES | | | SCAC4 |
| 5 | KRCAL | Krono Chemical S p. z o.o. | | PL | VKM |
| 6 | KRCC | KEG RIVER CHEMICAL CORP | | | SCAC4 |
| 7 | KRCF | KINSCHHOFFER TRUCK SERVICE INC | | | SCAC3 |
| 8 | KRCF | KUSKIE OIL AND REPAIR | | | SCAC4 |
| 9 | KRCH | KARCHMER, A & SON INC | | | SCAC4 |
| 10 | KRCHE | Alfa Terminal Szczecin Sp. z o.o. | | PL | VKM |
| 11 | KRCI | KIAMICHI RAILROAD COMPANY, INC. | | | PWRC |
| 12 | KRCI | KARSTEN CORPORATION | | | SCAC3 |
| 13 | KRCK | KRUCKER MANUFACTURING LIMITED | | | SCAC4 |
| 14 | KRCL | KRC LOGISTICS LLC | | | SCAC4 |
| 15 | KRCM | K & R COMPANY | | | SCAC4 |
| 16 | KRCN | K & R CARRIERS INC | | | SCAC4 |
| 17 | KRCO | KERN ROCK COMPANY | | | SCAC3 |
| 18 | KRCP | K R C PRODUCTS | | | SCAC3 |
| 19 | KRCP | KERO CHIPPING LTD | | | SCAC4 |
| 20 | KRCQ | KRUMROY CARTAGE INC | | | SCAC3 |
| 21 | KRCS | KNIFE RIVER CORPORATION - SOUTH | | | SCAC4 |
| 22 | KRCU | KIWIRAIL | | NZ | BIC |
| 23 | KRCX | R.M. Johnson Co., Inc. | 7/2005 (not listed) | | NAKINA |
| 24 | KRCX | R.M. Johnson Co. d/b/a Kimball Railcar Services | eliminated 1/2005 | | NAKINA |
| 25 | KRCX | Merchants Despatch Transportation Corp. (reporting marks for Keefe Packing Co.) | 7/1937-4/1938; 1/1941 (not listed) | | NAKINA |
| 26 | KRCX | Keefe Packing Co. (Merchants Despatch Transportation Corp.) | Apr-38 | | NRHS |
| 27 | KRCX | *KEEFE PACKING CO. (MERCHANTS DESPATCH TRANSPORTATION CORP.) | | | PWRC |
| 28 | KRCX | *KOKOMO RAIL COMPANY, INC. | | | PWRC |
| 29 | KRCX | +R. M. JOHNSON CO. d/b/a KIMBALL RAILCAR SERVICES | | | PWRC |
| 30 | KRCX | KIMBALL RAILCAR SERVICES | | | SCAC4 |
| 31 | KRCZ | KNIFE RIVER COAL COMPANY | | | PWRC |
