Looks like Skype is preparing for a public offering–the Internet-phone company has filed plans for an IPO. It’s estimated that Skype will sell up to $100 million of American depositary shares in its initial public offering on NASDAQ.

According to the filing, Skype’s revenues reached $406 million in the first six months of 2010, netting only $13 million. Despite the disparity around its numbers, the communications tool continues to see growth around its user activity. The filing goes on to boast 95 billion minutes of voice and video calls during the same time.

On the investment side, Skype has had one heck of a ride. An over-valued acquisition by Ebay eventually led to the auction house selling its majority stake in Skype last year, while several other private equity companies have also contributed to the pot.

Despite its prominence and rampant growth, Skype has yet to reach its full potential. A number of competitors have come about since Skype first launched, and seeking optimal ways to integrate and monetize Internet phone services has left Skype in need of some changes. The plans around an IPO indicate the company’s desire to survive and prevail during the evolution of the telecom industry. Skype recently settled a 4-year patent lawsuit around its services, and has already brought in new execs with plans for expansion in the Valley.