Contact your respective 811 provider below either via website or phone to locate and mark underground utilities before you dig.
Alabama: http://www.al811.com/
Arizona: http://www.arizona811.com/
Arkansas: http://www.arkonecall.com/
California North: http://www.usanorth811.org/
California South: https://www.digalert.org/home.html
Colorado: http://www.co811.org/
Connecticut: http://www.cbyd.com/
Delaware: http://www.missutilitydelmarva.com/
Florida: http://www.sunshine811.com/
Georgia: http://www.georgia811.com/
Idaho, Boise: http://www.digline.com/
Idaho, Coeur D’Alene: http://www.passwordinc.com/
Illinois: http://www.illinois1call.com/
Chicago: https://www.cityofchicago.org/city/en/depts/cdot/supp_info/dig_site_notificationprocedures.html
Indiana: http://www.indiana811.org/
Iowa: http://www.iowaonecall.com/
Kansas: http://www.kansasonecall.com/
Kentucky: http://www.kentucky811.org/
Louisiana: http://www.laonecall.com/
Maine: http://www.digsafe.com/
Maryland: http://www.missutility.net/
Massachusetts: http://www.digsafe.com/
Michigan: http://www.missdig.org/
Minnesota: http://www.gopherstateonecall.org/
Mississippi: http://ms1call.org/
Missouri: http://www.mo1call.com/
Montana: http://www.montana811.org/
Montana Flathead and Lincoln Counties: http://www.montana811.org/
Nebraska: http://www.ne1call.com/
Nevada: http://usanorth811.org/
New Hampshire: http://www.digsafe.com/
New Jersey: http://www.nj1-call.org/
New Mexico: http://www.nm811.org/
New York: http://www.digsafelynewyork.com/
North Carolina: http://www.nc811.org/
North Dakota: http://www.ndonecall.com/
Ohio: http://www.oups.org/
Oklahoma: http://www.okie811.org/
Oregon: http://digsafelyoregon.com/
Pennsylvania: http://www.pa1call.org/PA811/Public/
Rhode Island: http://www.digsafe.com/
South Carolina: http://sc811.com/
South Dakota: http://www.sdonecall.com/
Tennessee: http://www.tnonecall.com/
Texas: http://www.texas811.org/
Texas, Houston: http://www.lonestar811.com/
Utah: http://www.bluestakes.org/
Vermont: http://www.digsafe.com/
Virginia: http://www.va811.com/
Washington: http://www.callbeforeyoudig.org/
Washington DC: http://www.missutility.net/
West Virginia: http://www.wv811.com/
Wisconsin: http://www.diggershotline.com/
Wyoming: http://www.onecallofwyoming.com/