Area Code 301
Local Presence for Rockville, Silver Spring, Bethesda, Gaithersburg, Frederick, Laurel, and Hagerstown
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 301 and more than 200 others.
Reach out to customers in Rockville, Silver Spring, Bethesda, Gaithersburg, Frederick, Laurel, and Hagerstown.
Source: Wikipedia