Same as everyone else. Call rings 1-2 times and hangs up. No voice mail. Because I read about the person who has received calls from the same number with different area codes, I'm just going to block every call that I receive from (XXX)231-5518). As far as the person who has continued to receive calls, even after they blocked the number, I'll just wait to see if it happens to me, too.
I'm sure this caller is definitely getting something from these calls. Maybe they're stealing numbers to ghost calls. That is, making illegitimate calls and hiding their number by somehow using our number(s). I read about that being done. Who knows!?