Is dead SunRocket back? The former VoIP giant who closed down its business very recently, has once again hugged media attention by pulling Vonage into a new-found legal controversy.

In a lawsuit, SunRocket has alleged that Vonage illegally obtained company’s customer list from a third party and contacted some of the customers for its VoIP services.

SunRocket is now seeking injunctive and declaratory relief from Vonage by claiming its customer list one of its single most valuable remaining assets after shutting down VoIP business.

The former VoIP player adds that such type of illegal practice by Vonage damages company’s deals with Unified and 8X8, who are providing VoIP services to former SunRocketers.

However Vonage has strongly denied the charge stating that they obtained the list from a recognized marketing list broker. Hence, there is no violation of SunRocket’s proprietary rights.

SunRocket had left with 220,000 subscribers when it closed down its operation.