How Netflix Open Connect Delivers 95% of Its Traffic From Inside Your ISP

Netflix does not stream video from "the cloud" — it streams from servers physically sitting inside your internet service provider's building. Open Connect, Netflix's proprietary content delivery network, consists of over 19,000 custom-built servers deployed in 6,000+ locations across 175+ countries. These servers, called Open Connect Appliances (OCAs), deliver 95% of Netflix's traffic without that data ever crossing the public internet. It is one of the most ambitious infrastructure projects in the history of the internet, and it is the reason Netflix rarely buffers.

In 2012, Netflix accounted for roughly 33% of peak downstream internet traffic in North America. It was paying enormous transit fees to move data from cloud servers to end users, and the quality was inconsistent — traffic had to traverse multiple network hops, any of which could become congested.

The solution was radical: skip the internet entirely. Instead of renting capacity from commercial CDNs like Akamai or Cloudflare, Netflix would place its own servers directly inside ISP facilities. The closer the server is to the viewer, the fewer network hops, the lower the latency, and the less bandwidth that crosses expensive internet backbone links.

Netflix launched Open Connect in 2012 and offered ISPs a deal too good to refuse: Netflix would provide the hardware, the software, and the ongoing maintenance at zero cost to the ISP. All the ISP had to provide was rack space, power, and a network connection. In exchange, the ISP's customers would get better Netflix performance and the ISP would see massive reductions in transit traffic.

An Open Connect Appliance is a custom server designed for one purpose: serving video as fast as possible. The current generation can deliver up to 120 Gbps of video from a single server — enough to simultaneously stream 4K content to approximately 10,000 viewers.

Each OCA runs FreeBSD (not Linux) with a heavily customized networking stack. The servers use high-capacity SSDs and NVMe drives, with storage ranging from 100 TB to 280 TB per appliance depending on the deployment model. Netflix designs the hardware in-house and has the servers manufactured to specification.

Two deployment models exist:

• Embedded OCAs: Placed directly inside ISP facilities. These handle the bulk of traffic and are deployed at ISPs serving 10,000+ Netflix subscribers.
• Internet Exchange (IX) OCAs: Placed at internet exchange points (IXPs) where multiple networks interconnect. These serve as overflow capacity and cover ISPs too small to justify embedded deployments.

Open Connect doesn't wait for you to press play. Netflix's algorithms pre-position content on local OCAs before anyone requests it. During off-peak hours (typically 1 AM to 6 AM local time), Netflix pushes new and trending content to OCAs worldwide. The system considers:

• Regional popularity: A Korean drama trending in Southeast Asia gets pre-positioned on OCAs in that region.
• New releases: When a major title launches, it is pushed to every OCA globally before the release time.
• Predictive models: Netflix's recommendation engine predicts what specific subscriber populations are likely to watch and positions that content locally.
• Cache aging: Content that hasn't been requested recently gets deprioritized, freeing storage for hotter titles.

The result: when you press play, the video starts streaming from a server that might be a single network hop away — potentially in the same building as your ISP's router. Buffering becomes a near-impossibility unless your home network or device is the bottleneck.

Open Connect is deployed in 6,000+ locations across 175+ countries, making it one of the largest privately operated networks in the world. Netflix peers directly with approximately 3,000+ ISPs. The program has expanded to cover 95% of Netflix's traffic, with only 5% still flowing through commercial CDN providers (primarily Amazon CloudFront, used for API calls and metadata, not video).

The financial impact is enormous. Before Open Connect, Netflix was one of the largest customers of third-party CDNs, spending hundreds of millions annually on bandwidth. Today, the cost of operating Open Connect is a fraction of what commercial CDN fees would be at Netflix's scale. Analysts estimate the savings at $1-2 billion per year.

No other streaming service operates at this scale. Disney+ and Amazon Prime Video rely primarily on commercial CDN infrastructure (Akamai and Amazon CloudFront respectively). This infrastructure gap is one reason Netflix consistently delivers the most reliable streaming experience globally — and why it rarely appears in "streaming outage" headlines despite serving 325+ million subscribers.