811 In Your State


Explore damage prevention information, local contacts and rules for safe digging in Oklahoma.

Logo of Oklahoma One-Call System, Inc.

Oklahoma One-Call System, Inc.
811 or 1-800-522-6543

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6908 N. Robinson Ave.
Oklahoma City, OK 73116

24 / 7

Advanced Notice: No more than 10 days nor less than 48 hours, excluding the date of notification, Saturdays, Sundays, and legal holidays
Number of days in advance of a digging project that you need to notify the one call center of your intent to dig.

Marks Valid: Depends on visibility & 10 business days
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.