I got this call today around 11:50 am central time.  I didnt answer, but called back right away and no one picked up.  I have also got calls from a 201-7641 in the past(now 3 times).  They always hang up.

Anyone know what company this is???? They keep calling and not saying anything......ANOYING!!!!!!!!

They have called me several times in the past week.  I never answer....they never leave a message.  I finally called the number back today.  After 5 rings I hear what sounds like someone picking up.  Then I hear what sounds like them hanging up.  I stay on the line....they pick back up.  I then hear the sound them dialing a phone number.  Obviously not knowing I was still on the line.  This went on for about 5 mins...them hanging up...picking back up...trying to call a number...then hanging up again.  There has to be some sort of motive behind them calling.  This was my cell phone as well...sounds like they have obtained a list of cell phone #'s.  What their goal is I have no idea.

They called my cell, but I didn't pick up and they didn't leave a message

Same here ... I picked up and they didn't say a word.  Could they be trying to just gather data on phones that are legit to start a big calling campaign or something?