I've been receiving at least one call every day for the last week from this number. Usually a recording announces "this is a simple test for answering machines." Apparently, if a real person answers often enough they call again to give you their schpiel. Legitimate business or no: this is not the type of practice that would encourage me to deal with them.
Lately, that number has been calling me every day during different times of the day. It just hangs up - no message. I even received a call around 8:15pm this week.