| Business | Phone |
| Alvin Schultz 115 E Travis St # 1241, San Antonio 78205 | (210) 472-3471 |
| Allan C Tucker 2618 Friar Tuck Rd, San Antonio 78209 | (210) 826-8558 |
| Balin & Assoc 401 Austin Hwy, San Antonio 78209 | (210) 829-8008 |
| Bill Maloy 7373 Broadway St # 506, San Antonio 78209 | (210) 829-0060 |
| Brooner Exploration 900 Ne Loop 410 # D410, San Antonio 78209 | (210) 828-0384 |
| Calohan Limited 900 Ne Loop 410, San Antonio 78209 | (210) 828-4171 |
| Creede Ltd 11403 Raindrop Dr, San Antonio 78216 | (210) 349-5072 |
| Delcar Inc Po Box 6534, San Antonio 78209 | (210) 822-2272 |
| Double G Energy 900 Ne Loop 410 D104, San Antonio 78209 | (210) 822-0300 |
| Edman R Zink & Assoc 900 Ne Loop 410 D428, San Antonio 78209 | (210) 822-0071 |
| Inland Ocean Inc 8700 Crownhill Blvd 205, San Antonio 78209 | (210) 828-2625 |
| Louis H Haring Jr 2214 Camelback Dr, San Antonio 78209 | (210) 826-9646 |
| Mc Combs Energy Sa 8620 N New Braunfels Ave 113, San Antonio 78217 | (210) 822-1104 |
| Milton G Johnson 900 Ne Loop 410, San Antonio 78209 | (210) 826-8679 |
| R Scott Pollard 11912 Persuasion Dr, San Antonio 78216 | (210) 341-6689 |
| Post Cambrian Assn 115 E Travis St 1222, San Antonio 78205 | (210) 222-8308 |
| R L Shipman & Assoc 9033 Aero St 112, San Antonio 78217 | (210) 829-5003 |
| Robert B Robinson Consultant 8546 Broadway St 238, San Antonio 78217 | (210) 821-6213 |
| Taliaferro Cooper 115 E Travis St 1015, San Antonio 78205 | (210) 223-2963 |
| Wilford Lee Stapp Consulting 8620 N New Braunfels Ave 113, San Antonio 78217 | (210) 930-4100 |
| Charles E Kimmell 151 E Gramercy Pl, San Antonio 78212 | (210) 737-8343 |
| Don Urbanec 4737 College Park, San Antonio 78249 | (210) 493-1938 |