Our Network

The First and Largest 40G Fiber Optic Ethernet Network in America.

The sophistication and high capacity of our network helps us deliver the highest levels of service to our customers. The scalability of our data services allows us to deliver Ethernet, Internet and phone solutions – including more options at a service level – with great efficiency.

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A Network Built on Comcast Fiber

Comcast Business hosts a robust network that forms the basis of our Fiber Optic Internet services and other internet based services for small, mid-market, and enterprise level business. Learn more about how we use fiber optic cables to deliver high speed and reliable services to your business.

High Speed Internet Services

Ethernet and Enterprise Data Services

VoIP Services for Business


A Network Designed for Optimal Business Performance.

Our vast and constantly growing footprint spans 29 regional networks in 39 states and includes:

  • An enhanced Fiber Optic network, with more than 145,000 miles of fiber, that provides high speed, high quality and high definition services to a number of large companies
  • A support structure made up of thousands of professionals with the knowledge and experience to handle any situation
  • MEF-certified Carrier Class Ethernet that delivers standardized, scalable and reliable Metro Ethernet solutions – at a service and hardware level

View our Network Brochure (pdf).

Comcast currently provides Metro Ethernet services in the following markets. Additional markets will be launched on an ongoing basis.

  • Atlanta
  • Baltimore
  • Boston
  • Chicago
  • Denver
  • Detroit
  • Harrisburg, PA
  • Hartford
  • Houston
  • Indianapolis
  • Jacksonville
  • Miami
  • Nashville
  • New Jersey
  • Oakland
  • Philadelphia
  • Pittsburgh
  • Portland
  • Sacramento
  • Salt Lake City
  • San Francisco
  • San Jose
  • Seattle
  • Washington D.C.
  • Western New England
  • Minneapolis/St.Paul
Cocmast's Extensive Nationwide Fiber Optic Network

The largest facilities -based, last mile alternative to the phone company in the United States.


Comcast Business Fiber Optic Network

Our high-speed, high-capacity fiber optic internet operates across our vast and constantly growing Hybrid Fiber-Coax network, with more than 145,000 miles of fiber. We currently serve 18 of the top markets, delivering a multi-tier broadband service with scalable solutions to fit your business.