SupraNet SupraNet Search | Advanced Search | New Members | Coupons and Discounts | All Categories   Other >> IT Companies SupraNet 8000 Excelsior DriveMadison, WI 53717 | View on Google Maps Rachel Whitmore (608) 836-0282 Visit Site Supranet is a local, award winning, Madison-based company with more than 20 years providing fast, direct and reliable internet service to businesses in and around Madison. Member Since: 2016