Zayo expands its dark fiber and wavelength network into 15 new metros including Phoenix, Tampa, Indianapolis, and Salt Lake City. What dark fiber expansion means for enterprise network costs.
Zayo Group is expanding its dark fiber and wavelength network into 15 additional metro markets, extending one of the largest independent fiber platforms in North America — more than 17 million route miles — into fast-growing business corridors including Phoenix, Tampa, Indianapolis, and Salt Lake City. The buildout targets enterprise campuses, hospital systems, universities, and data center clusters that need dedicated fiber infrastructure rather than carrier-managed services.
Dark fiber changes the economics of high-bandwidth networking. Instead of paying per-megabit for a managed circuit, an enterprise leases the glass itself and lights it with its own equipment — turning bandwidth upgrades into a hardware swap rather than a new carrier contract. For organizations moving 10 Gbps or more between sites, dark fiber leases frequently cost less than half the equivalent managed wavelength service over a five-year term.
The expansion also matters for buyers who never touch dark fiber: Zayo's entry into a metro adds a wholesale supplier that regional ISPs and aggregators use to reach buildings, which widens the effective carrier list at thousands of addresses. Multi-site enterprises in the new markets should revisit their metro network designs — and their incumbent renewal quotes — against the new competitive baseline. Compare Select models dark fiber versus managed service economics across carriers so buyers can see the crossover point for their actual traffic.
Enterprise internet connectivity spans dedicated fiber (DIA), broadband coax, fixed wireless, and satellite. Dedicated Internet Access delivers symmetrical bandwidth with SLA-backed uptime and 4-hour repair windows — the standard for offices running VoIP, VDI, or cloud-first workloads. Availability is hyper-local: AT&T, Comcast Business, Lumen, and Spectrum Business each have distinct fiber footprints, so the best-value carrier at one address may not even serve the building next door. Brokers can pull availability across every carrier at once instead of quoting one at a time.
Compare the vendors covered in this space side by side in our Internet & ISP Providers comparison, with independent profiles for Comcast Business, AT&T Business, Verizon Business, Spectrum Business, Lumen Technologies, Frontier Business, Nitel, Granite Telecommunications, Windstream Enterprise, Zayo Group, Cogent Communications. Every profile includes deployment and pricing models, competitor differentiators, and a buyer's FAQ drawn from real procurement engagements.
Vendor announcements like this one are negotiation events. Licensing changes, rebrands, acquisitions, and product launches all reset the competitive landscape — and reset your leverage at renewal. Compare Select tracks how each development translates into transacted pricing across hundreds of enterprise deals, so before you accept a "best and final" quote or auto-renew an expiring agreement, benchmark it against the current market. Our brokerage service is free to buyers: we shortlist the two or three vendors that genuinely fit your environment, coordinate demos, and run the pricing negotiation across competing suppliers, while you contract directly with the vendor you choose.
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