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March Mania 2026

Fill out the form below to be entered into the March Mania Giveaway! Deadline is April 6th.

Location

100 East Main Street
PO Box 280
Hills, Iowa 52235

Office Hours

Regular Business Hours:
Monday – Friday 8:00am-5:00pm

Lobby Hours:
Monday – Friday 9:00am-4:00pm

319.679.2211

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Copyright 2026 Cornerstone Group | Forms and Policies | All Rights Reserved
  • Home
  • About Us
    • About Us
    • Careers
    • History
    • Staff
  • Services
    • Hills/Sharon Customer Area
    • Riverside Customer Area
    • Lone Tree Customer Area
    • Mobile Connect
    • STC Connect
    • Equipment
    • Video Streaming
    • Lifeline
  • Community
    • Scholarships
    • Community Updates
  • Contact Us
  • Webmail
  • Paperless Billing / Pay Bill
  • Riverside Fiber
  • March Mania
Sharon Telephone Company