| 1 | KECA | KENNECOTT EXPLORATION COMPANY | | | SCAC4 |
| 2 | KECB | KIPO EXPRESS CORP | | | SCAC4 |
| 3 | KECC | KELLY, JOHN A CARTAGE CO | | | SCAC3 |
| 4 | KECG | KEYYEY CARGO SYSTEM | | | SCAC3 |
| 5 | KECH | KETCHUM TRUCKING COMPANY | | | SCAC3 |
| 6 | KECI | KEENE CARRIERS INC | | | SCAC3 |
| 7 | KECM | KEENAN TRANSIT CO | | | SCAC3 |
| 8 | KECN | KENCO INC | | | SCAC3 |
| 9 | KECO | KINGS EXPRESS CORP | | | SCAC3 |
| 10 | KECP | KESS CORP | | | SCAC3 |
| 11 | KECQ | KENOSHA CARTAGE | | | SCAC3 |
| 12 | KECQ | KENCO LOGISTIC SERVICES | | | SCAC4 |
| 13 | KECR | KETCHER TRUCKING | | | SCAC3 |
| 14 | KECS | KEENER, C S TRUCKING | | | SCAC3 |
| 15 | KECS | Kecskeméti kisvasút | | H | TRAFFIC |
| 16 | KECT | KETTLE CREEK TRANSPORTATION | | | SCAC3 |
| 17 | KECU | ECO TRADING & SERVICE | | | SCAC4 |
| 18 | KECX | Kuner-Empson Co. | 7/1937-7/1954; eliminated 10/1956 | | NAKINA |
| 19 | KECX | Kuner-Empson Co. | 4/38-1/52 | | NRHS |
| 20 | KECX | *KUNER-EMPSON CO. | | | PWRC |
| 21 | KECX | *KELLOGG COMPANY | | | PWRC |
