Charles F. Mason started his telephone career at the age of 15. In 1924, at age 27, he formed a syndicate of Los Angles businessmen and purchased Redondo Home Telephone Company and Santa Monica Bay Home Telephone Company.
In 1929, Associated Telephone Company, Ltd. was formed to take over the above properties, together with other Southern California Independent telephone companies. He was made vice president and general manager of the new company (now GTE), and later the same year was elected president. He was named chairman of the board and chairman of the executive committee in 1947, as well as being appointed consultant to what is now GTE.
He was elected USITA president, 1943-1944, and served as a director 1934-1947. He was also president of the California Independent Telephone Association for 20 years; vice president, Independent Telephone Association for 20 years; vice president, Independent Pioneer Telephone Association (ITPA); and past president, California Chapter; ITPA. He died in 1967.