Here lately we've been receiving quite a few calls from 866 379 2003 - thankfully we have caller ID - the number comes up on our TV (if it's on, and we're watching) so we've been ignoring these calls. In addition to caller ID our provider also provides call-history and I just checked - we've had 12 calls from that number in the past three days, including 5 yesterday.
My wife and I have a policy - if we don't recognize the name or the number we don't answer any calls. If it's important, they will leave a message, we figure. And thus far Mr/Mrs 866 379 2003 has not left a message.
(I just did a Google search for that number - that convinced me, we should continue ignoring these calls.)