Answered call and caller immediately hung up. Caller ID displayed Contact Center from Denver CO. Blocked number. Agree with ladygeek that this was an automated call and add that it is also harassment. Have always told telemarketers to put me on their do not call lists and don't ever contact me again. Don't know if that is related here. Have had a number of these types of calls lately. Too bad, the feds don't care about policing these criminals. They should. People have a right to be free from harassment.