Who called from 7810000000

I recieved 2 calls this evining and 1 yesterday from this number, just clicking in back ground. Hung up imeditley

called 3 times between 4:00 and 8:00.  Sounds like a recording was going to start then hung up

called at least 5 times this evening with no one there.ied to call back-it's an invalid phone number.

Abswered the phone this time and the person on the other end wanted to ask me some questions about the upcoming election to take Sen. Kennedy's place.

Received two called from this number. Both times they did not leave a message. CID says MASSACHUSETTSh.