Vonage named Louis Mamakos to the newly named position of CTO. Most recently, Mr. Mamakos was a fellow at Hyperchip, Inc. where he held various technical engineering and architecture role. Prior to Hyperchip, Mr. Mamakos spent eight years at UUNET Technologies, where he guided the company's rollout of its Internet backbone beginning in 1993. Mamakos is also credited with being the first chairman of the DNS working group within the IETFhttp://www.vonage.com