Who called from 6132483732

My wife in Louisville Kentucky received 4 calls from this number and 248-3731. When I tried to call back it said both were not assigned.
what the hell is going on here?????????

Just received 3 calls in a row from this number- 1st went to answering machine- just clicking noise. Next call was 2 min. later, when I answered just same clicking noise.  3rd. same as first.  Very annoying

Caller phones and noises sound like a fax machine, received 4 phone calls so far, I'm certain that this won't be the last of it.

I believe this is from fax machine using the NextGen EHR system...

I received 3 calls this morning and when I answered it was just beeping