IPv6 White Paper
ARIN Letter to AT&T Regarding IPv4 Depletion
The American Registry for Internet Numbers (ARIN) estimates that IPv4 will be depleted within two years. ARIN is taking steps to ensure the legitimacy of all future IPv4 requests, and recommends making your organization's publicly accessible resources (e.g., external Web servers and e-mail servers) available via IPv6 as soon as possible.
Download White Paper [PDF, 614KB]