| 1 | ERC | Esso Resources Canada Ltd. | Callsign: Esso, | CDN | AVCODES |
| 2 | ERC | Esso Resources Canada | | | ICAO1 |
| 3 | ERC | EBENEZER RAIL CAR COMPANY | | | PWRC |
| 4 | ERC | Ethiopian Railway Corporation | | ETH | TRAFFIC |
| 5 | ERCA | ERICA EXPRESS | | | SCAC3 |
| 6 | ERCD | E R C DELIVERY SERVICE INC | | | SCAC4 |
| 7 | ERCH | EASTERN CHARTERS/TOURS INC | | | SCAC3 |
| 8 | ERCI | ELITE ROYAL COACH INC | | | SCAC3 |
| 9 | ERCK | ERICKSON TRANSPORT CORPORATION | | | SCAC3 |
| 10 | ERCK | ERICKSON TRANSPORT CORPORATION | | | SCAC4 |
| 11 | ERCM | ERIC MOTOR LINES INC | | | SCAC3 |
| 12 | ERCM | ERABLIERE RICHARD CAMERON | | | SCAC4 |
| 13 | ERCS | ERICK & SONS TRANSPORTATION INC | | | SCAC3 |
| 14 | ERCS | EMPAQUE RIO COLORADO | | | SCAC4 |
| 15 | ERCT | ERICKSON TRUCKING | | | SCAC3 |
| 16 | ERCU | HICRI ERCILI | | TR | BIC |
| 17 | ERCU | ERCO INDUSTRIES LTD | | | PWRC |
| 18 | ERCU | Erco Industries | | | RSRV |
| 19 | ERCU | ERCO INDUSTRIES LTD | | | SCAC3 |
| 20 | ERCU | ERCO INDUSTRIES LTD | | | SCAC4 |
| 21 | ERCX | EXCEL Railcar Corp. | added 4/1995; 7/2000-7/2005 | | NAKINA |
| 22 | ERCX | EXCEL Transnational, Inc. | added 7/1989; 1/1994; eliminated 4/1995 | | NAKINA |
| 23 | ERCX | Excel Railcar Corp. | added 10/1980; eliminated 7/1989 | | NAKINA |
| 24 | ERCX | Pennzoil United, Inc. | added 7/1970, eliminated 4/1973 | | NAKINA |
| 25 | ERCX | Elk Refining Co. | 8/1920-4/1970; eliminated 7/1970 | | NAKINA |
| 26 | ERCX | Elk Refining Co. | 4/38-4/70 | | NRHS |
| 27 | ERCX | Pennzoil United, Inc. | eliminated 4/73 | | NRHS |
| 28 | ERCX | Excel Railcar Corp. | added 10/80; eliminated 7/89 | | NRHS |
| 29 | ERCX | EXCEL Transnational, Inc. | added 7/89; 1/94; eliminated 4/95 | | NRHS |
| 30 | ERCX | EXCEL Railcar Corp. | added 4/95; 7/2000 | | NRHS |
| 31 | ERCX | *PENNZOIL UNITED, INC. [ELK REFINING CO.] | | | PWRC |
| 32 | ERCX | +EXCEL RAILCAR CORPORATION (EXCEL TRANSNATIONAL, INC.) | | | PWRC |
| 33 | ERCX | Excel Railcar Corporation | | | RSRV |
| 34 | ERCX | ELK REFINING CO | | | SCAC3 |
| 35 | ERCX | EXCEL RAILCAR CORPORATION | | | SCAC4 |
| 36 | ERCX | Excel Railcar Corp. | | USA | TRAFFIC |
