Keep getting calls from this number with no message.  It says Cheyenne, WY.  How do we get this to end if there's no response when we call back?

Just  this week I started getting phone Cheyenne wyo numer 307-459-2990  it is nonsense  i answered
twice they hung up, third they verified it was me and hung Needs to stop.

We just started getting these calls from Cheyenne, Wyoming from 307-459-2990 and they keep calling.  My husband finally answered and they asked for me.  He asked them what they were calling for and they said it was a "courtesy call" and when he asked what for they hung up.  If anyone has any tips on what these people are doing and how to make them stop I would love to hear them.  Thanks!

I receive this call 2 or 3 times a day. Unable to call back to see who it is because I receive a busy signal..This kind of calls should be monitored and fined or placed on do NOT CALL LIST

RECEIVED A CALL FROM THIS NUMBER TO MY CELL PHONE AND I DID NOT ANSWER IT BUT WHEN I DIALED IT BACK I RECEIVED A BUSY SIGNAL....IF THEY DON'T WANT ANYTHING THEN THEY NEED TO STOP CALLING OR PLAYING GAMES