The Butterfield Stage and Overland Mail delivered the mail to Millerton on 18 September 1858 as part of the first US transcontinental postal route. After the Civil War, the early railroads delivered mail and parcels to the Oklahoma and Indian territories.
In 2001, 93.0% of Oklahoma's occupied housing units had telephones. In 2003, Oklahoma had 24 major AM and 55 major FM radio stations, and 19 major television channels. Oklahoma City had 600,240 television households, 63% of which received cable. A total of 44,743 Internet domain names were registered in the state in 2000.