Hills Telephone Company
Holding: Alliance Communications Cooperative
About Hills Telephone Company
Hills Telephone Company is a rural ILEC (incumbent local exchange carrier) operating in South Dakota, providing local phone service, broadband internet, and long-distance services to customers in small communities. The company is owned by Alliance Communications Cooperative, a customer-owned communications cooperative headquartered in Garretson, South Dakota. Hills Telephone operates as part of a broader regional network of rural telephone cooperatives serving the upper Midwest.
- Parent: Alliance Communications Cooperative
- Headquarters: Garretson, SD
- Services: rural local exchange service, broadband internet, long-distance service, fiber-to-the-home network
Sources: Alliance Communications – History · Recent Mergers & Acquisitions In The Communications Industry · South Dakota PUC – Telecommunications Operations Report 2010 · Alliance Communications – Home
Toll-free side: Hills Telephone Company also operates as a toll-free RespOrg (code GRP01). View on resporgs.com →
Headquarters: Garretson, SD
From Alliance Communications Cooperative Inc - IA (OCN 1405), the largest member of the Hills Telephone Company group.


Block portfolio at a glance
By age
- Recent (0). Last 18 mo
- Medium (0)
- Old (0)
- Undated (13)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- Iowa IA · 7
- Minnesota MN · 4
- South Dakota SD · 2
Top area codes
Bars show total blocks; red overlay is recent.
Member OCNs
3 OCNs roll up under Hills Telephone Company.
| OCN | Company name on file | HQ | Type | Total | Recent |
|---|---|---|---|---|---|
| 1405 | Alliance Communications Cooperative Inc - IA | Garretson, SD | Incumbent Local Exchange Carrier | 7 | · |
| 1406 | Alliance Communications Cooperative Inc - MN | Garretson, SD | Incumbent Local Exchange Carrier | 3 | · |
| 280D | Alliance Communications Cooperative Inc - SD | Garretson, SD | Incumbent Local Exchange Carrier | 3 | · |
