ONEOK » MEMBERSHIP DIRECTORY Go back to directory. Add to Address Book. ONEOK ONEOK Contact: Anne Billingsley 1301 S. Mopac Expressway #400 Austin TX 78746 work Work Phone: 512 971 3221work Work Fax: 512 370 8400workfax Work Email: anne.billingsley@oneok.comINTERNET Website: http://www.texasgasservice.com Categories: SILVER MEMBER, UTILITIES Updated 11 years ago. Share