| 1 | WRN | Blue Bell, Inc. | Callsign: Wrangler, | USA | AVCODES |
| 2 | WRN | Washington Run R.R. Co. | 7/1923-7/1930 | | NAKINA |
| 3 | WRN | WASHINGTON RUN RAILROAD CO. | | | PWRC |
| 4 | WRND | WARREN DEVELOPMENT CO INC | | | SCAC4 |
| 5 | WRNF | WARREN FABRICATING CORP | | | SCAC4 |
| 6 | WRNG | WREN SHIPPING LLC | | | SCAC4 |
| 7 | WRNK | WRN TRUCKING | | | SCAC4 |
| 8 | WRNN | WARREN FOODS LLC | | | SCAC4 |
| 9 | WRNO | WORN OUT INC | | | SCAC4 |
| 10 | WRNR | WERNER TRANSP CO | | | PWRC |
| 11 | WRNS | WIDE RANGE TRANSPORT INC | | | SCAC4 |
| 12 | WRNX | Warren Petroleum Co. | 7/1930-7/1937 | | NAKINA |
| 13 | WRNX | Warren Petroleum Corp. | 4/1938-10/1966; eliminated 1/1970 | | NAKINA |
| 14 | WRNX | Gulf Oil Co.—U.S., Division of Gulf Oil Corp. | added 1/1970; 4/1970-1/1980; eliminated 7/1982 | | NAKINA |
| 15 | WRNX | Gulf Refining and Marketing Co., Division of Gulf Oil Corp. | added 7/1982 | | NAKINA |
| 16 | WRNX | Gulf Oil Products Co., Division of Gulf Oil Corp. | eliminated 7/1985 | | NAKINA |
| 17 | WRNX | Chevron U.S.A. Inc. | 1/1994-7/2005 | | NAKINA |
| 18 | WRNX | Warren Petroleum Corp. | 4/38-10/66; eliminated 1/70 | | NRHS |
| 19 | WRNX | Gulf Oil Co.--U.S., Division of Gulf Oil Corp. | added 1/70; 4/70-1/80; eliminated 7/82 | | NRHS |
| 20 | WRNX | Gulf Refining and Marketing Co., Division of Gulf Oil Corp. | added 7/82 | | NRHS |
| 21 | WRNX | Chevron U.S.A. Inc. | 1/94-7/2000 | | NRHS |
| 22 | WRNX | CHEVRON U.S.A. INC. [GULF OIL PRODUCTS CO.; WARREN PETROLEUM CORP.] | | | PWRC |
| 23 | WRNX | Gulf Oil Products (Chevron USA) | | | RSRV |
| 24 | WRNX | CHEVRON USA INC | | | SCAC4 |
| 25 | WRNX | Warren Petroleum Corp. / Gulf Oil Products / Chevron USA | | USA | TRAFFIC |
