| Ballance T S | 217-422-3120 | 250 N Water St | Decatur | IL | 62523 |
| Bi-Petro Incorporated | 217-529-0181 | 3180 Adloff Ln | Springfield | IL | 62703 |
| Carey John Oil Co | 217-498-9077 | RR 1 | Mechanicsburg | IL | 62545 |
| Carey John Oil Co | 217-364-4497 | 14759 Moomey Rd | Mechanicsburg | IL | 62545 |
| Cb Enterprises | 217-226-4214 | Route 51 South | Assumption | IL | 62510 |
| Collins Lester E Ofc | 217-522-5440 | 435 W Washington St | Springfield | IL | 62702 |
| Covington Michael C Ofc | 217-258-6663 | 121 N 43rd St | Mattoon | IL | 61938 |
| Danville Gasoline & Oil Co | 217-442-0049 | 201 W Main St | Danville | IL | 61832 |
| Dedica Energy Corp | 217-235-9191 | 1317 Wabash Ave | Mattoon | IL | 61938 |
| Dove Inc | 217-932-4513 | 110-5 E Main St | Casey | IL | 62420 |
| Duncan Walter Inc | 217-234-9752 | S 33rd St Rd | Mattoon | IL | 61938 |
| Excel Energy Co | 217-544-1667 | 1324 S Spring St | Springfield | IL | 62704 |
| Henigman Oil | 217-345-5707 | 516-1/2 6th | Charleston | IL | 61920 |
| Jasper Oil Producers Inc | 217-773-3909 | 109 S Capitol Ave | Mount Sterling | IL | 62353 |
| Kaufman Oil Co | 217-423-1554 | 119 W William St | Decatur | IL | 62523 |
| Knierim Company Inc Ofc | 217-932-2222 | 1001 E Main St | Casey | IL | 62420 |
| L & J Producers Inc | 217-932-6163 | 700 E Washington Ave | Casey | IL | 62420 |
| Lahoil Inc | 217-234-7300 | 1020 Broadway Ave | Mattoon | IL | 61938 |
| Lincoln Land Oil Co | 217-774-3165 | 615 N Cedar St | Shelbyville | IL | 62565 |
| Magic Hair Guard Inc | 217-253-3112 | 100 S Main St | Tuscola | IL | 61953 |
| Max Inc | 217-932-2010 | RR 2 | Casey | IL | 62420 |
| Monrae Oil & Gas Ltd | 217-932-4032 | 100 S Central Ave | Casey | IL | 62420 |
| Oil Producers Association | 217-546-8988 | 5243 W Washington St | Springfield | IL | 62707 |
| Ordner Well Services | 217-857-3700 | 107 W Water St | Teutopolis | IL | 62467 |
| Orrell Ben Oil Producers | 217-932-5301 | Old Rt 40 E | Casey | IL | 62420 |
| Pessina Louis A Oil & Gas Inc | 217-243-1214 | 40 Central Park Plaza | Jacksonville | IL | 62651 |
| Potsch Inc | 217-258-8717 | 913 S 19th St | Mattoon | IL | 61938 |
| South Fork Inc | 217-932-5965 | RR 2 | Casey | IL | 62420 |
| State Oil Properties Inc | 217-932-5650 | 303 N Central Ave | Casey | IL | 62420 |
| Strother Lillian D | 217-645-3037 | W Pittsfield St | Liberty | IL | 62347 |
| Three Star Drilling & Production Co | 217-932-4429 | Siggins Field | Casey | IL | 62420 |
| Triple C Oil | 217-932-5721 | 107 NW 1st St | Casey | IL | 62420 |
| Ward Oil Co | 217-528-5664 | 2019 E Clear Lake Ave | Springfield | IL | 62703 |
| Wooddell Logging | 217-234-2033 | 2217 Commercial Ave | Mattoon | IL | 61938 |
