Oneok

Oneok is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Gas Utility Companies
• Oil & Gas Producers

North American Industry Classification System (NAICS) Categories:

• Crude Petroleum And Natural Gas Extraction
• Natural Gas Distribution > Natural Gas Companies

Standard Industry Classification (SIC) Categories:

• Crude Petroleum & Natural Gas > Oil & Gas Producers
• Gas Production &/Or Distribution