811 Logo

The national Call Before You Dig number, 811, was created to help protect you from unintentionally hitting underground utility lines while working on digging projects.

One call to 811 gets your underground utility lines marked for free!


Stock InformationAbout ONEOK Partners

  • Phone Customer Service Shareholder Inquiries:
    877-208-7318

  • Phone Customer Service Royalties Relations:
    918-588-7463

  • Phone Customer Service Schedule K-1:
    800-371-2188

  • 811 logoCall 811 before you dig.

  • Safety Data Sheets