Who called from 7633673945

Called three times in a row, fax tone first time, then called and let ring once a couple times. Weird.

called three times each time was a fax tone. Did not answer any calls.  Actualy woke us up.  Very annoying

I am receiving a call on my land line from this number about every 15 -30 minutes.  It started last night and I unplug my phone. Plugged it back in this morning and the calls continued.  It leaves several beeps on my message machine. How do I stop this?

repeated fax tone, multiple calls in a day. No way to stop the nuisance!

This is a fax from an insurance company trying to go through.  We are a dental office and they sent me a fee schedule, but I can't figure out which company it came from!