AT&T DNS Error Assist is a FREE service provided as part of your AT&T Internet Service.
Sometimes you may enter a wrong web address or the website you want is no longer in service. This could lead to a “page not found” error message. When this happens, the DNS Error Assist service automatically searches for similar or related websites and presents you with results that may be useful for you.
You are enrolled by default, but you are free to stop at any time.
You may opt out of DNS Error Assist by changing your settings in the Internet section of your AT&T Privacy Choices Dashboard.