Citizens Telecommunications Company of Montana

Frontier Communications owns local telephone operating companies consisting of companies it has owned under its previous name Citizens Communications Company, companies it acquired from Global Crossing, and companies it acquired from Verizon Communications which are grouped under its subsidiary Frontier Communications ILEC Holdings. The companies operate in largely rural areas (with a few exceptions).

The following lists breaks down the companies in each state that Frontier provides service to. Each company has been acquired by Citizens Utilities, which later changed its name to Frontier, since the 1980s.

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