In 1999 two models of mandatory data retention were suggested for the United States: What IP address was assigned to a customer at a specific time. In the second model, "which is closer to what Europe adopted", telephone numbers dialed, contents of Web pages visited, and recipients of e-mail messages must be retained by the ISP for an unspecified amount of time.[73][74][75] The Internet Stopping Adults Facilitating the Exploitation of Today's Youth Act (SAFETY Act) of 2009 also known as H.R. 1076 and S.436 would require providers of "electronic communication or remote computing services" to "retain for a period of at least two years all records or other information pertaining to the identity of a user of a temporarily assigned network address the service assigns to that user".[76] This bill never became a law.[77]