Who called from 6193301897

I got two calls back-to-back at 5:40 a.m. from this number and 330-1898--only beeps.  This is especially annoying because I have elderly parents in that area code and thought it might be an emergency.  A scam?

received several calls from this number with a fax tone at 5:45 am.  When you try to call the nunber back says it is not operable.

This is an Fax.com number

I got call from 619 330 1897 fax signal come on

For the past month or so we have received repeat calls from this # at around 6:30 A.M. Happens a few times a week. Phone company couldn't help. Has anyone figured out how to stop this? I tried faxing a letter back to the # but it came up disconnected.
Help!!!