From checking another site, this # relates to a credit-card phishing scam. It showed up on my CID as v30610111600523 (which others have said refers to the date, local time, and telemarketer's log?? Using VoIP??). My T-Mobile service lists the "real" # beneath the long one as 928-329-1075. The long #s apparently cannot be read by most phone blockers, so are being used as a way around these devices...the latest twist in scammer terrorism, I guess. My cell phone gets turned off at 10 p.m., but I received three attempts from the long # between midnight and 6 a.m., highly illegal even for telemarketers. Others report getting calls nearly 24/7 from these long #s, presumably b/c they can't be reported via the standard DNC format. I've blocked the "928" # and am curious to see what happens.