| 1 | ECB | European Coastal Airlines Ltd. | IATA: H5, Callsign: Coastal Clipper, IATA designator changed to WL | HR | AVCODES |
| 2 | ECB | European Coastal Airlines Ltd. | IATA: WL, Callsign: Coastal Clipper, Ceased operations October 2016. IATA designator changed from H5 | HR | AVCODES |
| 3 | ECB | European Coastal Airlines | | | ICAO1 |
| 4 | ECB | ELECTROCARBON SLATINA SA | | RO | VKM |
| 5 | ECBK | EMERY CUSTOMS BROKERS | | | SCAC3 |
| 6 | ECBK | EMERY CUSTOMS BROKERS | | | SCAC4 |
| 7 | ECBL | EXPRESS CASA BLANCA | | | SCAC4 |
| 8 | ECBN | EXCAVATION CLAUDE BRETON | | | SCAC4 |
| 9 | ECBR | East Cooper and Berkeley R.R. Co. | added 7/1978; 1/1980-7/2000; eliminated 10/2003; 7/2005 | | NAKINA |
| 10 | ECBR | East Cooper and Berkeley R.R. Co. | added 7/78; 1/80-7/2000 | | NRHS |
| 11 | ECBR | EAST COOPER & BERKELEY RAILROAD COMPANY | | | PWRC |
| 12 | ECBR | East Cooper and Berkeley Railroad | | | RSRV |
| 13 | ECBR | EAST COOPER AND BERKELEY RAILROAD C | | | SCAC3 |
| 14 | ECBS | EASTERN CARIBBEAN STEEL IMPORTERS | | | SCAC3 |
| 15 | ECBT | ECONOCARIBE TRUCKING | | | SCAC3 |
| 16 | ECBU | EUROPEAN CONTAINERS NV | | B | BIC |
| 17 | ECBU | EUROPEAN CONTAINERS NV | | | SCAC4 |
| 18 | ECBY | EAST COAST BOAT & YACHT HAULING LLC | | | SCAC4 |
