Interstate Telecom
About Interstate Telecom
Interstate Telecommunications Cooperative is an independent rural ILEC providing telephone, fiber internet, and streaming TV services across 5,500 square miles in northeastern South Dakota and western Minnesota, serving approximately 50,000 people. It primarily serves consumers and small businesses in its cooperative member base with FTTH networks completed in 2020. As a small local exchange carrier, it operates in a niche rural market alongside other South Dakota cooperatives.
- Founded: 1954
- Headquarters: Clear Lake, SD
- Services: rural ILEC, fiber internet, telephone, streaming TV, hosted voice, managed IT
Sources: Meet our Members: Interstate Telecommunications Cooperative · SOUTH DAKOTA LOCAL TELEPHONE COMPANIES · Interstate Telecommunications Cooperative · Contact ITC Customer Service
Headquarters: Clear Lake, SD
From Interstate Telecommunications Cooperative Inc - SD (OCN 1651), the largest member of the Interstate Telecom group.


Carrier website
itc-web.com: opens in a new tab
Block portfolio at a glance
By age
- Recent (0). Last 18 mo
- Medium (0)
- Old (0)
- Undated (32)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- South Dakota SD · 28
- Minnesota MN · 4
Top area codes
Bars show total blocks; red overlay is recent.
Member OCNs
2 OCNs roll up under Interstate Telecom.
| OCN | Company name on file | HQ | Type | Total | Recent |
|---|---|---|---|---|---|
| 1651 | Interstate Telecommunications Cooperative Inc - SD | Clear Lake, SD | Incumbent Local Exchange Carrier | 29 | · |
| 1654 | Interstate Telecommunications Cooperative Inc - MN | Clear Lake, SD | Incumbent Local Exchange Carrier | 3 | · |
