Area Code 219

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 219 and more than 200 others.

Reach out to customers in Gary, Hammond, Merrillville, Portage, Michigan City, and Valparaiso.

Source: Wikipedia