| Business | Phone |
| Butkin Oil Co 1313 W Ash Ave # 104, Duncan 73533 | (580) 252-4311 |
| C E Harmon Oil Inc E Of City, Duncan 73533 | (580) 252-4670 |
| Caprock Inc 15 N 9th St # 208, Duncan 73533 | (580) 255-0831 |
| David L Atwell 16 S 9th St # 301, Duncan 73533 | (580) 252-0601 |
| Jack Oil Co 1032 W Main St # 100, Duncan 73533 | (580) 255-2310 |
| Jasmine Partners Po Box 1103, Duncan 73534 | (580) 252-6930 |
| Jones Oil Co 16 S 9th St # 302, Duncan 73533 | (580) 255-9400 |
| L E Jones North Thackerville Ih 35, Duncan 73533 | (580) 276-5120 |
| Lamco Drilling Co 101 S 15th St # 150, Duncan 73533 | (580) 470-8662 |
| Link Energy Corp Rr 3 Box 70, Duncan 73533 | (918) 255-7151 |
| Mack Energy Co 1202 N 10th St, Duncan 73533 | (580) 252-5580 |
| Perkins Energy Co 15 N 9th St # B2, Duncan 73533 | (580) 255-5400 |