| 1 | KRM | Crimea Universal Avia | Callsign: Trans Universal, | UA | AVCODES |
| 2 | KRM | Crimea Universal Avia | | | ICAO1 |
| 3 | KRM | KENTUCKY RAILWAY MUSEUM | | | PWRC |
| 4 | KRM | Krauss-Maffei | | D | TRAFFIC |
| 5 | KRMD | KORMENDY TRUCKING | | | SCAC3 |
| 6 | KRME | KRAMME, P E, INC | | | SCAC3 |
| 7 | KRME | KRAMME | | | SCAC4 |
| 8 | KRMK | KARMACK TRANSPORTATION INC | | | SCAC3 |
| 9 | KRML | KERR MOTOR LINES, INC | | | SCAC3 |
| 10 | KRML | Kreisbahn Mansfelder Land | Real: KML, Die Kreisbahn Mansfelder Land GmbH (KML) ist ein öffentliches Eisenbahninfrastruktur-[1] (EIU) und -verkehrsunternehmen (EVU). Als EIU betreibt es die Parkeisenbahn Vatterode. Als EVU fährt es im Auftrag der Nahverkehrsservice Sachsen-Anhalt im Personenverkehr auf der Bahnstrecke Klostermansfeld–Wippra. | D | TRAFFIC |
| 11 | KRMQ | KRAMERTOWN CO INC | | | SCAC3 |
| 12 | KRMR | KRAMER, GERALD L INC | | | SCAC3 |
| 13 | KRMR | KRAMER SCULPTURES INC | | | SCAC4 |
| 14 | KRMS | KRUKENKAMP MOVING & STORAGE INC | | | SCAC3 |
| 15 | KRMS | KROEKER MACHINERY SALES LTD | | | SCAC4 |
| 16 | KRMU | HANS-GEORG KRAMER MOBELTRANSPORTE | | D | BIC |
| 17 | KRMV | KNIFE RIVER MATERIALS | | | SCAC4 |
| 18 | KRMW | KRUMWIEDE | | | SCAC4 |
| 19 | KRMX | Union Tank Car Co. | added 7/1961; 7/1965-4/1970; eliminated 7/1973 | | NAKINA |
| 20 | KRMX | Kerr-McGee Oil Industries, Inc. | added 7/1956; 10/1957-4/1961; eliminated 7/1961 | | NAKINA |
| 21 | KRMX | Kerr-McGee Oil Industries, Inc. | added 7/56; 10/57-4/61 | | NRHS |
| 22 | KRMX | Union Tank Car Co. | 7/65-4/70; eliminated 7/73 | | NRHS |
| 23 | KRMX | *KERR-MCGEE OIL INDUSTRIES, INC. (UNION TANK CAR CO.) | | | PWRC |
| 24 | KRMX | *KERSHAW MANUFACTURING COMPANY, INC. | | | PWRC |
| 25 | KRMX | KAWASA | | | SCAC4 |
