| Business | Phone |
| Atlantic Richfield Co Hays 67601 | (785) 625-7832 |
| Berexco Inc 800 Commerce Pkwy # A, Hays 67601 | (785) 628-6101 |
| Black Diamond Oil Inc 2703 Hall St, Hays 67601 | (785) 625-5891 |
| Tengasco Inc 1327 Noose Rd, Hays 67601 | (785) 625-6374 |
| Thomason Petroleum Inc 301 W 13th St # 305, Hays 67601 | (785) 625-9045 |
| Taurus Oil Co Po Box 981, Hays 67601 | (785) 628-1727 |
| Challenger Exploration 111 W 10th St, Hays 67601 | (785) 625-4780 |
| Citation Oil & Gas Corp 4104 Smoky Hill Dr, Hays 67601 | (785) 628-3364 |
| Da Mar Resources Inc 234 W 11th St, Hays 67601 | (785) 625-0020 |
| Diehl Oil Inc 1116 Vineyard Rd, Hays 67601 | (785) 625-6711 |
| Dreiling Oil Inc 1008 Cody Ave, Hays 67601 | (785) 625-8327 |
| R P Nixon Operations Inc 207 W 12th St, Hays 67601 | (785) 628-3834 |
| Elysium Energy Llc 1016 E Us Hwy 40 Byp, Hays 67601 | (785) 625-4052 |
| Esp Development Paradise 1749 250th Ave, Hays 67601 | (785) 998-4413 |
| Pattco Inc Hays 67601 | (785) 625-7974 |
| Penguin Petroleum Inc 1200 Main St # 404, Hays 67601 | (785) 623-4900 |
| Petroleum Inc Hays 67601 | (785) 625-7948 |
| Oil Co Of America Inc 1200 Main St # 406, Hays 67601 | (785) 625-3800 |
| Gary Bolding Corp Catherine Rt, Hays 67601 | (785) 625-6427 |
| Hupfer Oil & Gas 201 E 32nd St, Hays 67601 | (785) 628-8666 |
| Knighton Oil Co 2840 E 8th St, Hays 67601 | (785) 623-4081 |
| Lario Oil & Gas Co 2501 280th Ave, Hays 67601 | (785) 625-5023 |
| Lebsack Oil Production Inc 205 E 7th St # B353, Hays 67601 | (785) 625-5444 |