Received a call from (515) 478-7622 caller ID showed "V01315074100354". Did not answer.  Now blocked.

These idiots have called may home phone about 30 times over the last several weeks and never left a message.
Blocked the number now, but they sure are annoying.

I think it is political callers, but it's pissing me off! All morning long, I have received calls from a variety of numbers in a very clear pattern.  Call #1 at time X (712-250-2441 CID "CONTACT CENTER").  Call #2 two minutes later.  10 minute pause.  Call #1 from a DIFFERENT number (515-478-7622 CID "CONTACT CENTER") followed by another call from that number two minutes later.  10 minute pause.  Call #1 from a THIRD number (206-670-1952 CID "UNKNOWN"), then again two minutes later.

The last one left a message on the machine.  Marianne Yoshino is running for Port of Seattle commissioner and left a scratchy recorded message to come to a fundraiser.

Looks like these same three numbers did the same routine yesterday, while I was out, time offset two hours later in the day.  This is war-dialing at its worst!