7 min read · Published August 24, 2026 · Vast Networks
Three layers, and why the middle one is decisive
Long-haul backbones move traffic between major metros and internet exchanges. Last-mile networks connect individual premises. Middle mile is everything in between: the regional routes that carry aggregated traffic from communities to the points where it can reach the wider internet.
Last mile gets the attention because it is what customers see. Middle mile determines whether last mile is economically possible at all, because without affordable regional transport a local network has nowhere to go.
Why the Central Valley is a middle-mile story
California's inland regions have the geography that makes commercial middle-mile investment unattractive: long distances between moderate population centres, and an economy concentrated in agriculture and processing at sites away from town. National carriers built where density justified it and routed around much of the rest.
The result was communities and businesses with no realistic path to serious connectivity — not because nobody would build a local network, but because a local network would have had nothing to connect to.
Public investment and what it produced
The federal Broadband Technology Opportunities Program, funded through the 2009 Recovery Act, financed middle-mile construction across the country. In California's Central Valley, a BTOP award in 2010 funded a regional middle-mile network reaching across 18 counties — the infrastructure that became the Vast Networks backbone and that still carries traffic for carriers, schools, agencies, and businesses across the region.
California has continued that approach through subsequent state and federal broadband programmes, on the same reasoning: build the regional layer as open infrastructure and let last-mile providers, institutions, and businesses use it.
What it means if you run a business in the Valley
It is the reason a processing plant outside Hanford or a district office in Merced can get an engineered circuit when the address would never appear on a national carrier's build plan. The regional fiber already passes nearby; the remaining question is the last stretch to your building.
It also explains why availability has to be confirmed per address rather than by city. Regional presence is genuinely broad; whether your specific site can be reached depends on distance, route, and what construction is involved.