Google Voice (formerly GrandCentral) is a telecommunications service by Google launched on March 11, 2009. Google Voice had some 1.4 million users in October 2009, 570,000 of whom used the service 7 days a week. This number has risen markedly since Google made the transition of its Google Voice service from 'invitation only' to be available to all Gmail subscribers. However, Google has not released a more recent number of users, claiming only that it is in the millions.