California Communications Association

Member Companies

For over 95 years, CalCom has provided advocacy, education, connections, and the exchange of new ideas and technology to our family of member businesses.  Join the list of telecommunication professionals committed to bringing broadband access to all Californians.

Calaveras Telephone Logo Calaveras Telephone (Cal-Tel) serves Western Calaveras County from its headquarters in Copperopolis.  The Company is family-owned and operated with a proud heritage dating back to 1895.  It offers digital voice, high speed Internet and IP-based digital TV services to its customer base.  Additionally, it provides wireless broadband to nearby communities.
Cal-Ore Telephone Co. Logo Cal-Ore Telephone Co. is located in Dorris,California and was founded in 1950.  It serves approximately 3,000 access in Siskiyou and Modoc counties.
Ducor Telephone Logo Ducor Telephone is located in Ducor, California and was founded in 1954.  It serves approximately 1,500 access lines in Tulare and Tehama counties.

 Pinnacles Telephone

Pinnacles Telephone Co. is located in Paicines, California and was founded in 1955.  It serves approximately 300 access lines in the southern end of San Benito County.
Ponderosa Telephone Logo Ponderosa Telephone is located in O’Neals, California and was founded in 1908.  It serves approximately 10,000 access lines in Fresno,Madera, and San Bernardino counties.
Sebastian Logo Sebastian (formerly Kerman Telephone) is located in Kerman, California and was founded in 1911.  It serves approximately 10,000 access lines in Fresno and Placer counties.
Sierra Telephone Logo Sierra Telephone is located in Oakhurst, California and was established in 1895, serves customers in Eastern Madera and Mariposa counties.
Siskiyou Telephone Logo Siskiyou Telephone is located in Etna, California and was founded in 1896.  It serves approximately 5,000 access lines in Siskiyou county.
TDS Logo TDS Telecommunications Corporation with headquarters in Madison, Wisconsin, is the seventh largest telecom provider in the U.S.  TDS owns and operates three companies in California – Happy Valley, Hornitos, and Winterhaven – and provides access to both voice and data services to most of its nearly 5000 customers across Shasta, Tehama, Trinity, Mariposa and Imperial counties.
Vast Networks Vast Networks is located in Fresno, California. Offering telecom services and peripheral support technologies, Vast has deployed over 1,700 miles of fiber optic infrastructure throughout California in the past few years and continue to deliver fiber solutions to both rural and metropolitan areas throughout the state.
Volcano Telephone Logo Volcano Telephone is located in Pine Grove, California and was founded in 1904.  It serves approximately 10,000 access lines in Amador, Calaveras, El Dorado, and Alpine counties.