ISP & Telecom Directory · United States

Cheyenne River Sioux Tribal Tel. Authority

Cheyenne River Sioux Tribal Tel. Authority is an Incumbent LEC in United States, listed in the FCC register. The contact details below are reproduced from that register as of August 2026; verify against the live register before serving legal process.

Cheyenne River Sioux Tribal Tel. Authority

Incumbent LEC

Also known as: Cheyenne River Sioux Tribe Telephone Authority

Agent for service of process: Salvatore Taillefer, Blooston, Mordkofsky, Dickens, Duffy & Prendergast, 2120 L Street NW, Suite 825, Washington, DC, 20037
Agent phone / fax: (202) 828-5562 · fax (202) 828-5568
Agent email: [email protected]
Headquarters: PO Box 810, Eagle Butte, SD, 57625
Customer inquiries: (605) 964-2600
Holding company: —
States served (1): South Dakota
FCC 499 Filer ID: 809682
Last filing: 4/1/2026

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Source: FCC Form 499 Filer Database. Independent reference for study and investigative use; Ministry of Cyber Affairs is not a government body and does not represent Cheyenne River Sioux Tribal Tel. Authority. Names and contact details are reproduced as published by the regulator.