Area Code 831

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 831 and more than 200 others.

Reach out to customers in Monterey, Santa Cruz, Salinas, Hollister, Aptos, and Carmel.

Source: Wikipedia