AT&T is expanding its open RAN deployment, Light Reading reports, and the operator already has cloud-based radio access network technology in its sights as the next phase of the network overhaul.

The headline fact is simple but significant: one of the United States' largest mobile operators is widening the use of open, disaggregated radio equipment in its live network. For an operator of AT&T's scale, an expansion of open RAN sites is no laboratory exercise. It is commercial traffic running over hardware and software that follows the O-RAN Alliance's interface specifications rather than a single vendor's proprietary stack.

The report does not attach fresh site counts or dates to the latest expansion. What it does confirm is direction: more open RAN in the field, and a roadmap that now points toward cloud RAN — running radio network functions on a cloud-native, general-purpose compute platform rather than purpose-built appliances.

Why does an open RAN expansion matter?

Open RAN splits the radio access network into components that can, in principle, come from different suppliers and talk to each other over standardized, open interfaces. The pitch to operators is vendor choice and cost pressure. The risk, historically, has been integration: someone has to make parts from different vendors work together at carrier grade, and that someone is often the operator itself.

For AT&T, the expansion signals that the integration burden has become manageable enough to push the technology further into the production network rather than confining it to trials. That is the line every operator watching this market looks for — the moment disaggregation stops being a proof of concept and starts being routine procurement.

It also matters competitively. AT&T operates in a three-player US mobile market where network quality claims drive consumer switching. Any radio access change at this scale has to hold up against the performance of the classical single-vendor networks it replaces. An operator does not widen an open RAN footprint if the numbers are going backwards.

What changes when the RAN moves to cloud?

Cloud RAN takes disaggregation a step further. Instead of virtualized network functions running on dedicated hardware at each site, the architecture pushes toward cloud-native software — containerized, orchestrated, and able to run across distributed and centralized compute locations.

The commercial logic is twofold. First, hardware flexibility: general-purpose servers can, over time, replace specialized equipment, changing the cost curve of the access network. Second, software velocity: updates and new features ship the way cloud software ships, not the way embedded telecom equipment ships.

For vendors, cloud RAN redraws the boundaries of the market. Companies with deep cloud and software estates gain a route into radio access, while incumbent radio specialists have to prove their software can thrive on someone else's infrastructure. AT&T's interest, as reported, suggests the operator sees enough maturity in the technology to put it on the planning horizon rather than the research wishlist.

What comes next?

The near-term questions are the ones the report's headline sets up but does not yet answer: how many additional sites the expansion covers, which vendors are supplying the radios and the software, and when cloud RAN moves from architecture ambition to deployed cells carrying subscriber traffic. Each of those details, when AT&T or its suppliers disclose them, will mark the pace at which one of America's biggest networks replaces its radio access foundations while the network stays live.