Communications technology in the U.S. has exploded in recent years. In addition to growth in home and business telephones, there has also been an increase in wireless and other communication devices. Because of this growth, we’re running out of telephone numbers.
In some areas, the need for new numbers is so great that new area codes are being added. There is more than one type of solution in these conditions; however, the majority involve an Area Code Overlay. An overlay is the addition of another area code to the same geographic region as an existing area code. An overlay doesn’t require customers to change their existing area code or telephone number.
The following state list is area codes that require 10-digit dialing, even for local calls. For information on recent area code activities and how they may affect you, review your state and area code. Area codes with more recent activity include a customer notification with more information about changes.
The addition of new area codes won't affect the price of telephone calls placed over AT&T networks.
Note: Dialing 911 and calls to directory assistance aren't affected by the updates. If 211, 311, 411, 511, 611, 711, or 811 are available in your community, you can still dial three digits.
For industry information and further details on area code relief planning, visit the North American Numbering Plan Administration (NANPA) website.