Area Code 605

Local Presence for Rapid City, Sioux Falls and Aberdeen

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 605 and more than 200 others.

Reach out to customers in Rapid City, Sioux Falls and Aberdeen.

Source: Wikipedia