| 701 | ECCI | ECONOCARIBE CONSOLIDATORS INC | | | SCAC4 |
| 702 | ECCM | EAGLE CAP CAMPERS INC | | | SCAC4 |
| 703 | ECCO | EAST CAROLINA CARTAGE COMPANY INC | | | SCAC3 |
| 704 | ECCO | Ecco Rail | | PL | TRAFFIC |
| 705 | ECCO | ECCO-Cargo-Rail-GmbH | | DE | VKM |
| 706 | ECCOR | Ecco Rail Sp. z o.o. | | PL | VKM |
| 707 | ECCP | ECOLE CORP | | | SCAC3 |
| 708 | ECCR | ECT CORP | | | SCAC3 |
| 709 | ECCR | ECT CORPORATION | | | SCAC4 |
| 710 | ECCS | EAST COAST TRANSPORT INC | | | SCAC3 |
| 711 | ECCS | EARTHLINK CARGO AND CUSTOMS SERVICE | | | SCAC4 |
| 712 | ECCT | ECCARIUS TRUCKING | | | SCAC3 |
| 713 | ECCU | ALOREM | | F | BIC |
| 714 | ECCX | Ethyl Canada Inc. | added 1/1982; 1/1994-7/2000; eliminated 10/2004; 7/2005 (not listed); added 4/2006 | | NAKINA |
| 715 | ECCX | Ethyl Corp. of Canada Ltd. | added 7/1956; 10/1957-1/1980; eliminated 1/1982 | | NAKINA |
| 716 | ECCX | Ethyl Corp. of Canada Ltd. | added 7/56; 10/57-1/80; eliminated 1/82 | | NRHS |
| 717 | ECCX | Ethyl Canada Inc. | added 1/82; 1/94-7/2000 | | NRHS |
| 718 | ECCX | ETHYL CANADA INC. | | | PWRC |
| 719 | ECCX | Ethyl Canada | | | RSRV |
| 720 | ECCX | ETHYL CANADA INC. | | | SCAC4 |
| 721 | ECCY | ELK CREEK COLONY | | | SCAC4 |
| 722 | ECD | Ecotour | Callsign: Ecotour, | MEX | AVCODES |
| 723 | ECD | Ecotour | | | ICAO1 |
| 724 | ECDE | ELITE COURIER & DELIVERY SERVICES | | | SCAC4 |
| 725 | ECDI | E C D INC | | | SCAC3 |
| 726 | ECDL | EXPEDITED COURIER AND DISTRIBUTION | | | SCAC4 |
| 727 | ECDN | EC DISTRIBUTION INC | | | SCAC4 |
| 728 | ECDO | EVERTS COMMERCIAL TRANSPORT INC | | | SCAC3 |
| 729 | ECDP | EPCO CARBON DIOXIDE PRODUCTS INC | | | SCAC4 |
| 730 | ECDS | ECONOMY DELIVERY SERVICE | | | SCAC3 |
| 731 | ECDS | ENCHANTED DESIGNS LTD | | | SCAC4 |
| 732 | ECDU | ECDC ENVIRONMENTAL, LC | | | PWRC |
| 733 | ECDU | ECDC Environmental | | | RSRV |
| 734 | ECDX | Ethyl Corp. | added 4/2006 | | NAKINA |
| 735 | ECDX | Ethyl Petroleum Additives, Inc. | added 1/1985; 1/1994-7/2005; eliminated 1/2006 | | NAKINA |
| 736 | ECDX | Edwin Cooper, Inc. | added 4/1979; 1/1980; eliminated 1/1985 | | NAKINA |
| 737 | ECDX | Edwin Cooper, Inc. | added 4/79; 1/80; eliminated 1/85 | | NRHS |
| 738 | ECDX | Ethyl Petroleum Additives, Inc. | added 1/85; 1/94-7/2000 | | NRHS |
| 739 | ECDX | *EDWIN COOPER, INC. | | | PWRC |
| 740 | ECDX | +ETHYL CORP. [ETHYL PETROLEUM ADDITIVES, INC.] | | | PWRC |
| 741 | ECDX | Edwin Cooper | | | RSRV |
| 742 | ECDX | ETHYL PETROLEUM ADDITIVES, INC. | | | SCAC4 |
| 743 | ECDY | EURO-CAN DELIVERY SERVICES | | | SCAC4 |
| 744 | ECE | Air City | IATA: 4F, Name changed from Air-City. Railway Service | D | AVCODES |
| 745 | ECE | Eurocity Express Ltd | Callsign: Eurocity, | GB | AVCODES |
| 746 | ECE | Air City | IATA: 4F | | ICAO1 |
| 747 | ECEC | EASTERN COMPACT EQUIPMENT CENTER IN | | | SCAC4 |
| 748 | ECEI | EAST COAST EXPRESS INC | | | SCAC3 |
| 749 | ECEI | EXPRESS CAN EAST INC | | | SCAC4 |
| 750 | ECEJ | ETHERINGTON, CHARLES E JR | | | SCAC4 |
| 751 | ECEL | EXCEL TRANSFER CORPORATION | | | SCAC3 |
| 752 | ECEN | EAST COAST ENTERPRISES | | | SCAC3 |
| 753 | ECEN | EAST COAST EXPRESS LINE INC | | | SCAC4 |
| 754 | ECEP | ECONOMY EXPRESS INC | | | SCAC3 |
| 755 | ECEP | EAST COAST EXPRESS INC | | | SCAC4 |
| 756 | ECEQ | ESTES, C E | | | SCAC3 |
| 757 | ECEU | HQEC | | F | BIC |
| 758 | ECEU | HQEC | | | SCAC4 |
| 759 | ECF | Eurocopter | Callsign: Eurocopter, Name changed to Airbus Helicopters | F | AVCODES |
| 760 | ECF | Airbus Helicopters | Name changed from Eurocopter | F | AVCODES |
| 761 | ECF | Eurocopter | | | ICAO1 |
| 762 | ECFC | ECONO FREIGHT CARIBBEAN INC | | | SCAC3 |
| 763 | ECFH | EUCLID FISH CO | | | SCAC4 |
| 764 | ECFL | ECONOMY TRANSPORT OF FLORIDA LLC | | | SCAC4 |
| 765 | ECFM | EAST COAST FREIGHT & MOVING SYSTEMS | | | SCAC3 |
| 766 | ECFO | EVANS COAL & FUEL OIL INC | | | SCAC4 |
| 767 | ECFP | EMERALD COAST FINEST PRODUCE CO INC | | | SCAC4 |
| 768 | ECFW | EAST COAST FREIGHTWAYS CORP | | | SCAC3 |
| 769 | ECG | Aero Ejecutivos R.C.G., S.A. de C.V. | Callsign: Ejecutivis RCG, | MEX | AVCODES |
| 770 | ECG | Aero Ejecutivos RCG | | | ICAO1 |
| 771 | ECGA | ECOLOGY AUTO WRECKING | | | SCAC4 |
| 772 | ECGH | EAST COAST GREYHOUND | | | SCAC3 |
| 773 | ECGI | ECOLOGY CONTROL INC | | | SCAC3 |
| 774 | ECGL | ELGIN CARTAGE LIMITED | | | SCAC3 |
| 775 | ECGL | ECL CARRIERS GP INC | | | SCAC4 |
| 776 | ECGO | EARTH CARGO INC | | | SCAC4 |
| 777 | ECGP | EXPRESS CARGO CORP | | | SCAC4 |
| 778 | ECGS | ELCANO GAS TRANSPORT SA | | | SCAC4 |
| 779 | ECGT | ECOGISTICS | | | SCAC4 |
| 780 | ECGX | Alabama Power Co. | added 1/1991; 1/1994; eliminated 7/1999; added 10/1999; 7/2000-7/2005 | | NAKINA |
| 781 | ECGX | Alabama Power Co. | added 1/91; 1/94; eliminated 7/99; added 10/99; 7/2000 | | NRHS |
| 782 | ECGX | *E. C. GASTON RAILROAD | | | PWRC |
| 783 | ECGX | +ALABAMA POWER COMPANY | | | PWRC |
| 784 | ECGX | Alabama Power | | | RSRV |
| 785 | ECGX | ALABAMA POWER COMPANY | | | SCAC4 |
| 786 | ECGY | ECOLOGY CHEMICAL & REFINING CO | | | SCAC3 |
| 787 | ECH | ESN Jet Service, LLC | | RUS | AVCODES |
| 788 | ECH | EAST CAMDEN & HIGHLAND RAILROAD CO. | | | PWRC |
| 789 | ECH | East Camden and Highland Railway | | USA | TRAFFIC |
| 790 | ECHA | ECHOLS, AL | | | SCAC3 |
| 791 | ECHA | ECH TRANSPORT LLC | | | SCAC4 |
| 792 | ECHB | ECHO BROOK FREIGHT INC | | | SCAC4 |
| 793 | ECHC | EAGLE COACH COMPANY | | | SCAC3 |
| 794 | ECHC | EL CHIPILONCITO | | | SCAC4 |
| 795 | ECHE | ECHOTA EXPRESS INC | | | SCAC3 |
| 796 | ECHF | ECHO FORWARDERS INC | | | SCAC3 |
| 797 | ECHI | ECHO INC | | | SCAC3 |
| 798 | ECHIZ | Echizen Railway | | J | TRAFFIC |
| 799 | ECHK | ECHOLS TRUCKING | | | SCAC4 |
| 800 | ECHL | ELITE COACH LTD | | | SCAC3 |
