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Milestone: ESnet marks 25 years of IPv6

Twenty-five years ago, on August 3, 1999, ESnet made history by receiving the first production IPv6 netblock in North America, marking a significant milestone in internet development. Assigned by the American Registry for Internet Numbers (ARIN), this allocation, known as 2001:400::/32, remains in use today and represents a foundational moment in the deployment of IPv6 technology.

  • ESnet was issued the first production IPv6 netblock on August 3, 1999.
  • Pioneering IPv6: This allocation by ARIN was the first of its kind in North America and potentially the world.
  • IPv6, developed by the IETF in the 1990s, was designed to expand the addressing scheme to support the growing internet.
  • Ongoing Impact: ESnet continues to drive IPv6 adoption, co-leading the Department of Energy’s IPv6-only Implementation Team and promoting IPv6 in research and education networks globally.

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