Frontier

Frontier is listed under the Telephone Companies category (which is under the following categories: Telecommunications & Wireless -> Telephone Communications, Except Radiotelephone). They serve both B2B (business to business) and B2C (business to consumer) needs. They are located at 9324 West Stockton Boulevard in Elk Grove, California.
Mobile and regular directions can be viewed below as well as their phone number, ratings, website (when listed).