This is a collection agency. They call from Florida, Idaho, Montana, New Jersey and California. When you call the numbers back, the number is not in service. They don't leave messages and you cannot return the call. I did get a call from (714) area code in California and that number is a normal number that answers.
Well a little more information would help not only you but others as well. You say you called this 714 number and someone answered? What did they say? How do you know it is a DC is they don't leave messages and the numbers are all spoofed?