Didn't recognize phone number and I don't know anyone in Seattle, WA, which is what Caller ID identified as the origin of the call.  The call went through to my voice mail, but the caller left no message.  I assume it was a scam of some sort.  The latest "trick" seems to be to have Caller ID identify a city and state - probably figuring that the recipient of the call might actually know someone in the area and answer the phone.