My caller ID only said "Cell Phone, FL". I do not answer calls from numbers I don't recognize. However, area code (305) is the original Miami, FL area code, and as such is usually from a landline - house or business, and not very often found on cellphones. (It's also local for me.) I didn't answer, and once my answering machine kicked in, they hung up. Glad to see someone else could positively identify them as "foe".
I keep receiving calls from this number as well..I picked up phone and no one on other end. First calls were coming from a California number regarding credit cards. They may be connected.