Area Code 313
Local Presence for Detroit, Livonia, and Dearborn
You can increase your connection rate up to 30% by dialing from a local number.
Local Presence by Tenfold gives you one-click access from your existing phone system to a local number in the US area code 313 and more than 200 others.
Reach out to customers in Detroit, Livonia, and Dearborn.
Source: Wikipedia