Just got a call from the same number. The message I received told me to log onto verizonthankyou.com for a $100 towards my next phone bill. I checked it out and as much as I could tell the page was a mirror image of the actual verizon website. The difference was in the log in menu, which looked similar to Verizon's site, but asked for more info. The links on this fake page seem to send you to the real Verizon page from what I could tell.
I have informed Verizon fraud and the Australian company hosting WWW.myverizon90.com of the phone calls and request for Verizon Account information. Additional calls from others will put pressure for legal action. Domain information and host contact can be obtained by using whois internet network tools and entering in the fraudulent web site. Verizon has an email post on their customer service page.
Today it was myverizon100.com. The web designer did a good job cloning Verizon's actual site, the drop downs and store locator work like a charm. SS/PIN was the giveaway.