The Interstate 35 Telephone Company was incorporated in 1965 when Dale Mauer repurchased the Truro, Iowa exchange from Continental Telephone Company during the sale of the Afton Telephone exchange to Continental. Ed Buchanan was hired as the manager of the newly formed exchange. In 1965, St. Charles was added to the exchange, and in 1970, St. Marys was added. As soon as the towns were acquired, they were converted from magneto operation to one party buried plant and dial operation.
In 1978, Interstate 35 Telephone Company purchased Southwest Telephone Exchange. The company consisted of the towns of Emerson, Imogene, and Henderson, Iowa. An upgrade to one party service began at the time of the purchase and was completed in 1981. Heavy rains flooded the town of Emerson in 1982 and the dial office suffered extensive damage when four feet of water rose above the dial switching equipment.
Digital switching equipment was installed in St. Charles in 1983 and was then followed by Truro, Emerson and Henderson. A new company headquarters building was constructed in Truro in 1984 to house the new switch and general office of the company.
With the population growth from Des Moines out to the rural exchanges served by I-35 Telephone, demand for wireline and wireless high speed Internet service has significantly increased. Currently we support 1200 Internet customers, many of them working from home. In many of the small towns we serve, the telephone company is one of the main businesses and one of the key sources of revenue for many community projects.