Mainstream Fiber Networks is proud to announce that we have built over 120 miles of fiber optic cable infrastructure throughout Harrison County.  This includes both our mainline project as well as several adjoining neighborhoods that had high participation in our interest survey.  Because of this, we are now able to provide our services to approximately 10,000 households in the area, and that number will only continue to grow over the upcoming years.

Mainstream Fiber is the only fiber optic internet service provider in Harrison County: our service starts at 50 mbps download speed and extends all the way up to 1 Gbps.  Beyond that, our service is not, and will never be data capped or throttled.

If you’re interested in getting reliable high speed fiber internet, we may already be available in your neighborhood.  Call us at (844) 752 – 6736 , check online at, or visit our regional office in Corydon at 2370 Landmark Way to see if you can get signed up today.

If we are not already in your area, please take our survey at and encourage your neighbors to do the same.  We rely on demand to expand our network, so the most proactive neighborhoods will be connected first, not only that, but taking the survey ensures that you will be notified the moment construction of our network begins in your area.  Join the many who have already completed this step, as we continue to grow and expand all throughout Harrison County.

About Mainstream Fiber Networks:

Mainstream Fiber is a locally owned and operated internet service provider, headquartered in Nashville, Indiana, dedicated to bringing high speed, reliable, and affordable internet service to un-served or underserved communities throughout Indiana.  Mainstream Fiber operates independently, completing nearly every facet of providing fiber optic services internally, from construction, to network management, to operations and administration.