| 1 | HWS | Storm Heliworks AB | Callsign: Storm, | S | AVCODES |
| 2 | HWSC | HOMEWOOD SCAVENGER SERVICE, INC | | | SCAC1 |
| 3 | HWSD | HUMBLE WAREHOUSE AND DISTRIBUTION C | | | SCAC4 |
| 4 | HWSK | HENRYS WRECKER SERVICE | | | SCAC4 |
| 5 | HWSN | HAWKEYE STAGES INC | | | SCAC4 |
| 6 | HWSU | HIRAM WALKER AND SONS LTD | | | SCAC4 |
| 7 | HWSV | HWY SEVEN ZERO (70) TOWING & | | | SCAC4 |
| 8 | HWSX | Hiram Walker & Sons, Ltd. | 7/1937-1/1975; eliminated 10/1977 | | NAKINA |
| 9 | HWSX | Hiram Walker & Sons, Ltd. | 4/38-1/75 | | NRHS |
| 10 | HWSX | HIRAM WALKER & SONS,, LTD. | | | PWRC |
| 11 | HWSX | WALKER, HIRAM & SONS LTD | | | SCAC3 |
