The American Telephone and Telegraph Company was created in 1885
Electric Telegraph Company was created in 1846.
Atlantic Telegraph Company was created in 1856.
Universal Private Telegraph Company was created in 1860.
United Wireless Telegraph Company was created in 1906.
Great Northern Telegraph Company was created in 1869.
Providence Telephone Company was created in 1893.
Oriental Telephone Company was created in 1881.
Armstrong Telephone Company was created in 1946.
Bell Telephone Company was created in 1877.
Central Telephone Company of Virginia was created in 1971.
Peninsular Telephone Company Building was created in 1925.
Central Telephone Company of Texas was created in 1956.