Contact your respective 811 provider below either via website or phone to locate and mark underground utilities before you dig. Ohio: http://www.oups.org/ Ohio Boring Contractors Contact 811 | Call 811 Ohio Boring Contractors Contact 811 | Call 811 Alabama: 811 or 1-800-292-8525 Arizona: 811 or 1-800-782-5348 Arkansas: 811 or 1-800-482-8998 California North: 811 or 1-800-227-2600 … Continue reading Contact 811 One Call System