I receive calls from this number several times per week at varying times during the day.  Reverse call look-up indicates the number is coming from Campbell, CA.  I don't know anyone or have business relationships with any company from CA.

answered, no one on line...nothing...

After weeks of these calls and no one there when I picked up, I finally talked to a person.  They said it's from The Campaign Against Immigrants.
She ask if I thought Congress should do more in stopping the innigrants. They ask to send you a envelope to help with the campaign.

It happens to me also. Very nerve racking. They just call and hang up. This should be stopped.

They've called several times in the past two weeks.  No one's on the line, they just hang up.  When we don't answer, there's no message.