You are mistaken, sir ... The specified address belongs to Service Provider Corporation (SPC-10), a company that brokers IP addresses to various wireless service providers, such as Verizon. The address is active and current and the gentleman's issue is far from "solved".
In fact, I have the same issue. VZW's DHCP server regularly assigns me an IP address that was assigned previously to another customer (n sessions ago) ... And, that customer's computer was apparently infected with a NetBot, said NetBot was detected by CBL and the IP address got blacklisted.
So, suddenly, my session is no longer welcome at my email server.
In this instance, the other hapless VZW customer has Win32/SpyEye, a well-known malicious exploit that harvests private information and sends it to specific known destinations ...
Which, if Verizon's security team was on the ball, should have been walled off a long time ago.
I wrote them about it .. No reply yet ... We shall see ...