| 1 | ECK | East Coast Airlines Limited | Callsign: East Coast, Ceased operations. | EAK | AVCODES |
| 2 | ECKA | ECKART TRUCKING | | | SCAC3 |
| 3 | ECKA | ECOMARINE OCEAN KAYAK CENTRE | | | SCAC4 |
| 4 | ECKC | ECK CARTAGE COMPANY | | | SCAC3 |
| 5 | ECKD | ECKDAHL WAREHOUSE COMPANY | | | SCAC3 |
| 6 | ECKE | PGE Górnictwo i Energetyka Konwencjonalna S.A. Oddział Elektrociepłownia Kielce | | PL | VKM |
| 7 | ECKG | EPIC TRUCKING INC | | | SCAC4 |
| 8 | ECKH | ECKHARDT, GENE TRUCKING | | | SCAC3 |
| 9 | ECKI | EMPIRE CARTAGE OF KNOXVILLE INC | | | SCAC3 |
| 10 | ECKL | ECKLAR-MOORE EXPRESS INC | | | SCAC3 |
| 11 | ECKL | ECKBLAD TRUCKING LLC | | | SCAC4 |
| 12 | ECKM | ECK MILLER TRANSPORTATION CORPORATI | | | SCAC3 |
| 13 | ECKN | ECKNOR, INC | | | SCAC3 |
| 14 | ECKO | ECKERT OVERSEAS AGENCY INC | | | SCAC3 |
| 15 | ECKR | ECKERT, ROBERT D | | | SCAC3 |
| 16 | ECKR | ECKERT, R D INC | | | SCAC4 |
| 17 | ECKS | ECKSTEIN TRUCKING INC | | | SCAC4 |
| 18 | ECKSA | EDF Polska S.A. | | PL | VKM |
| 19 | ECKT | ECKERT TRUCKING INC | | | SCAC3 |
| 20 | ECKW | ECKLER, W A | | | SCAC3 |
