| 1 | GRC | Grace Flight Of America, Inc. | Callsign: Grace Flight, | USA | AVCODES |
| 2 | GRC | GLASGOW RAILWAY CO. | | | PWRC |
| 3 | GRC | Ghana Railway Corporation | | GH | TRAFFIC |
| 4 | GRCC | GRANITE CONSTRUCTION COMPANY | | | SCAC4 |
| 5 | GRCF | GARCIA ASTORGA, ABEVARDO | | | SCAC4 |
| 6 | GRCG | GREEN CHARTERING ASMIND NORWAY | | | SCAC1 |
| 7 | GRCG | GREEN CHARTERING A/S | | | SCAC4 |
| 8 | GRCI | GRACE TRANSPORT INC | | | SCAC4 |
| 9 | GRCJ | GARCIA CORTEZ, JOEL SA DE CV | | | SCAC4 |
| 10 | GRCK | GARCIA, F TRANSPORT | | | SCAC4 |
| 11 | GRCL | GRACE LINES INC | | | SCAC4 |
| 12 | GRCM | GREEN & CHAPMAN INC | | | SCAC4 |
| 13 | GRCN | GRACE TRANSPORT INC | | | SCAC4 |
| 14 | GRCR | GARCIA RECYCLING CENTER & METALS IN | | | SCAC4 |
| 15 | GRCU | BORCHARD LINES LTD | | GB | BIC |
| 16 | GRCU | GRACECHURCH CONTAINER LINE LTD | | | SCAC4 |
| 17 | GRCV | GREEN LINE EXPRESS SERVICES INC | | | SCAC4 |
| 18 | GRCX | Granite Rock Co. | added 1/1971; 1/1975-1/1994; 7/2000-7/2005 (not listed) | | NAKINA |
| 19 | GRCX | Warren Petroleum Corp. | 4/1961 | | NAKINA |
| 20 | GRCX | Gulf Oil Corp. | eliminated 7/1961 | | NAKINA |
| 21 | GRCX | Gulf Refining Co. | 8/1920-7/1935 | | NAKINA |
| 22 | GRCX | Gulf Oil Corp. | 7/1937-10/1957 | | NAKINA |
| 23 | GRCX | Gulf Oil Corp. | 4/38-10/57 | | NRHS |
| 24 | GRCX | Warren Petroleum Corp. | Apr-61 | | NRHS |
| 25 | GRCX | Granite Rock Co. | added 1/71; 1/75-7/2000 | | NRHS |
| 26 | GRCX | *GULF OIL CORP. [WARREN PETROLEUM CORP.; GULF REFINING CO.] | | | PWRC |
| 27 | GRCX | +GRANITE ROCK CO. | | | PWRC |
| 28 | GRCX | Granite Rock | | | RSRV |
| 29 | GRCX | GRANITE ROCK CO. | | | SCAC4 |
| 30 | GRCZ | GRANITE CITY STEEL | | | PWRC |
