AWS Unveils Fastnet Cable to Boost Transatlantic Cloud Connectivity

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TL;DR

AWS introduces Fastnet, a high-capacity transatlantic subsea cable, to enhance network resilience and support growing cloud and AI demands, operational by 2028.

Key Points

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The Fastnet cable is a high-capacity transatlantic subsea cable connecting Maryland, U.S., and County Cork, Ireland, expected to be operational in 2028.

It is designed to enhance network resilience by providing alternative data pathways and reducing service disruption risks.

With a capacity exceeding 320 terabits per second, it integrates into AWS's global network, offering secured long-term capacity and scalable bandwidth for critical operations.

The cable system features advanced optical switching technology and robust armoring for long-term reliability.

AWS's centralized, real-time traffic monitoring system ensures optimal path usage, avoiding congestion and maintaining uninterrupted operations.

Key Numbers

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320 Tbps

The capacity of the Fastnet subsea cable.

12.5 Million

The number of high-definition films that can be streamed simultaneously by the Fastnet cable.

9 Million kilometers

The total length of the AWS global fiber optic network.

2028

The year the Fastnet cable is expected to be operational.

Stakeholder Relationships

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Organizations

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Amazon Web Services (AWS) Cloud Service Provider

AWS is the primary developer and operator of the Fastnet subsea cable, enhancing network resilience and cloud computing capabilities.

Timeline of Events

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Nov 4, 2025 AWS announced the Fastnet subsea cable

AWS introduced the Fastnet, a high-capacity transatlantic subsea cable system connecting Maryland, U.S., and County Cork, Ireland.

2028 Fastnet cable set to become operational

Amazon Web Services (AWS) is making a splash with its latest venture, Fastnet, a high-capacity transatlantic subsea cable system. This ambitious project is set to connect Maryland in the U.S. with County Cork in Ireland, aiming to be up and running by 2028. The main idea? To beef up network resilience and meet the ever-growing demands of cloud computing and artificial intelligence (AI). By offering alternative data routes, Fastnet hopes to minimize service disruptions, allowing AWS customers to enjoy consistent and reliable connectivity.

Now, Fastnet isn't just another cable. It's a powerhouse, part of AWS's global network, with a design capacity of over 320 terabits per second (Tbps). To give you a sense of scale, that's enough bandwidth to stream 12.5 million high-definition movies simultaneously. The cable's strategic placement with unique landing points is all about route diversity, providing backup options if other cables run into trouble. This is particularly useful for applications using AWS services like Amazon CloudFront and AWS Global Accelerator.

But it's not just about raw power. Fastnet features advanced optical switching branching unit technology, allowing data to be redirected to future landing points as network demands evolve. This scalable architecture is designed to handle the increasing AI traffic loads, letting customers ramp up their data needs quickly. Plus, Fastnet's design includes protective measures against natural and human activities, ensuring it remains reliable and performs well over the long haul.

AWS isn't just focusing on the tech side, though. They're also investing in the communities in Maryland and County Cork. Through Community Benefit Funds, AWS plans to support local initiatives, including sustainability programs, STEM education, and economic development.