Boston Just Put an Internet Exchange in Its Streets. Here Is How Peering Actually Works.

There is an internet exchange running beneath the streets of Boston. Not a data center, not a server room, but the streets themselves: an underground conduit network where fiber cables from dozens of providers meet and hand traffic to one another. It is called the Hub Express System, or HEX, and this week it got a direct line to one of the biggest internet exchanges in North America.

On October 12, DE-CIX, the German company that runs one of the world's largest internet exchange fabrics, announced a partnership with TOWARDEX, a Boston internet infrastructure provider, to connect HEX directly to DE-CIX New York. The arrangement uses DE-CIX's Carrier Turnkey Connectivity model, which lets regional carriers sell access to the exchange without renting space in traditional carrier hotels or paying cross-connect fees at either end.

What an internet exchange actually does

Start with a simple question. When you load a website hosted on another network, how do your packets get there? The comforting answer is that they travel through "the internet," an undifferentiated cloud. The real answer is a business negotiation, repeated thousands of times per second.

Every network is an independent system: your home ISP, your mobile carrier, Netflix's content network, your bank's hosting provider. For data to move between two networks, the networks must interconnect, and they have two basic options. The first is transit, where the smaller network pays a larger one to carry its traffic everywhere, like hiring a courier. The second is peering, where two networks agree to exchange traffic directly, usually for free, because it is cheaper and faster for both sides.

An internet exchange point, or IXP, is where peering happens at scale. It is a physical location, typically a room full of switches inside a data center, where hundreds of networks plug in and hand traffic to one another directly. Instead of your ISP paying a transit provider to haul Netflix's bits across the country and back, your ISP and Netflix meet at the exchange and swap the bits in the same building. The trip gets shorter, latency drops, and everyone pays less.

Peering is the internet's quiet handshake: hundreds of networks agreeing to hand traffic to one another directly, in the same building, instead of paying a middleman.

The Boston deal, in plain terms

What makes the Boston announcement unusual is where the exchange is. Peering has traditionally happened inside carrier hotels, big buildings in city centers where dozens of networks colocate equipment. For a small regional ISP in New England, reaching a major exchange meant renting space in one of those buildings, buying a port, paying monthly cross-connect fees for the cables linking your rack to the exchange's switches, and paying for the fiber to get there. Each line item was a barrier to entry.

HEX attacks the real estate problem. It is a subterranean telecom corridor, conduits running under Boston's streets, open to any licensed provider at what TOWARDEX calls an affordable $1.54 per foot per year. Networks interconnect inside the underground system itself, in what the company calls a "Meet-Me Street," instead of inside a carrier hotel. There are no monthly recurring cross-connect fees, and carriers can resell access to the DE-CIX ecosystem without those fees being passed to their customers.

The partnership then extends that street south, virtually, to New York. A network plugged into HEX in Boston can now reach the DE-CIX New York peering fabric, the largest exchange in the Northeast and the third largest in North America, which connects more than 260 networks across more than 40 data centers and handled over 5 exabytes of traffic in 2025. From there, remote peering opens the door to DE-CIX exchanges in Mexico, Brazil, and Europe, including DE-CIX Frankfurt, the largest exchange on the continent.

Executives on both sides framed it as a cost story. Gavin Schoch of TWDX Infrastructure, a TOWARDEX subsidiary, said the deal stops forcing networks to backhaul traffic to what he called rigid, centralized, and outdated carrier hotels. Ed d'Agostino, vice president of DE-CIX North America, said the arrangement removes cross-connect fees on both the Boston and New York sides while providing low-cost transport between the cities. The companies did not disclose the investment value, the route length, or expected traffic capacity.

The exchange is moving toward the edge

Boston is not an isolated case. It is part of a broader shift: peering is going local. In September, DE-CIX helped launch ALPSiX, a new neutral exchange in southern Austria backed by a EUR 5.7 million investment from the Carinthian state government, built so regional traffic no longer detours more than 600 kilometers via Vienna. Unusually, ALPSiX will run in compact edge containers rather than traditional data centers, a deliberate move to bring interconnection closer to users and applications.

The logic is straightforward. As video, gaming, cloud, and AI workloads push ever more traffic onto networks, hauling everything to a distant exchange gets expensive, and the extra distance shows up as latency. A local exchange keeps local traffic local: a video call between two people in the same city should not have to leave the city. DE-CIX now operates in more than 60 locations worldwide, and the pattern is consistent. Build the exchange where the traffic is, not the other way around.

What this means if you just use the internet

None of this changes anything you click. Peering is invisible infrastructure, and that is the point. But its effects surface in everyday experience. Shorter paths mean lower latency, the difference between a video call that feels instant and one that feels like talking to the Moon. Direct interconnection means your ISP pays less to deliver the content you actually watch, one of the quiet forces holding consumer broadband prices down.

It also matters for resilience. When networks peer at many exchanges instead of funneling everything through a few transit providers, traffic has more paths to take when something breaks. A cable cut, a routing mishap, or a congested link becomes a local problem rather than a catastrophe. The internet's famous robustness is not an accident of physics. It is the accumulated result of thousands of peering agreements, each one a small decision that traffic should take the shortest available road.

The next time a page loads a beat faster than you expected, thank a handshake you will never see: two networks, in the same building, or now the same street, quietly agreeing to skip the middleman.