I received a call from this number while I was on the phone talking to someone else. I did not take the call at that time. I phoned the number when I finished the first call and it was from a comany called Campaign Research. The phone was answered by an answering machine and aaked me to leave my name and phone number - I just hung up the phone.

This number has called several times in the past few days.  I didn't answer, and they didn't leave a message.

Got a call from this number - initially heard strange noises on phone but no one responded - then a voice saying this is campaign research - unknown whether it was human or not; upon hearing the word 'research' I hung up the phone.

Get calls from this number all the time but they never leave a message.

This number has been calling me non stop for the last few days. I unplugged my answering machine!