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AWS Announces New Subsea Cable Connecting Ireland and US

Fastnet will boost AWS's subsea network capacity to over 320 terabits per second, enabling reliable cloud and AI services with enhanced resilience through diverse routing.

  • Amazon Web Services announced Fastnet, a transatlantic subsea cable linking Maryland, United States, and County Cork, Ireland, expected operational by 2028.
  • Built to meet rising demand, Amazon Web Services is finalizing Fastnet's design and engaging local communities in Maryland and County Cork to address environmental and commercial concerns.
  • Design capacity exceeds 320 terabits per second, with AWS saying it streams 12.5 million HD movies, transmits the digitised US Library of Congress thrice, and uses robust armoring and 1.5 meter shore bores.
  • When operational, Fastnet will create alternative data pathways for faster, reliable cloud and AI services, while Wes Moore said, `To grow our economy, we need to prioritise industries of the future` and AWS will fund community benefits in Cork and Maryland.
  • Given their scale, subsea fiber‑optic cables carry over 95% of international data and face rising risks from ship anchors and bad actors; last month's AWS outage highlighted reliability concerns but was unrelated to Fastnet.
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US About Amazon broke the news in on Tuesday, November 4, 2025.
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