| 1 | HRL | Commander Flugdienst GmbH | Callsign: Harley, | D | AVCODES |
| 2 | HRL | Harsco Rail Limited | | UK | VKM |
| 3 | HRLA | HOLT, ROYCE L | | | SCAC4 |
| 4 | HRLB | H & R Lube Blending GmbH | | DE | VKM |
| 5 | HRLC | HARLIN TRUCKING LLC | | | SCAC4 |
| 6 | HRLE | HARRIS, LIONEL OIL CO INC | | | SCAC4 |
| 7 | HRLF | HIGHCROFT RACING LTD | | | SCAC4 |
| 8 | HRLG | HRL TRANSPORT LLC | | | SCAC4 |
| 9 | HRLH | HARDY, LOUIS H TRUCK LINE | | | SCAC4 |
| 10 | HRLI | HEERINGA, R L INC | | | SCAC4 |
| 11 | HRLJ | HOLT, RICK TRUCKING LLC | | | SCAC4 |
| 12 | HRLL | HI RAIL LEASING | | | SCAC4 |
| 13 | HRLP | HARLYN TRANSPORT INC | | | SCAC4 |
| 14 | HRLQ | HILL, R L EXPRESS LLC | | | SCAC4 |
| 15 | HRLT | HIGH ROLLER TRANSPORT LIMITED | | | SCAC4 |
| 16 | HRLU | KARNAPHULI LIMITED | | BD | BIC |
| 17 | HRLU | HUDSON RY EQUIPMENT CO (DIV. OF HUDSON LEASING CO.) | | | PWRC |
| 18 | HRLU | Hudson Railway Equipment (Division of Hudson Leasing) | | | RSRV |
| 19 | HRLX | Housatonic Logistics Co. | added 10/2003; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 20 | HRLX | HOUSATONIC LOGISTICS CO. LLC | | | PWRC |
| 21 | HRLX | HOUSATONIC LOGISTICS COMPANY LLC | | | SCAC4 |
| 22 | HRLZ | HUDSON RY EQUIPMENT CO | | | PWRC |
| 23 | HRLZ | Hudson Railway Equipment | | | RSRV |
| 24 | HRLZ | HUDSON RY EQUIPMENT CO | | | SCAC4 |
