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The map shows where Mt. Rushmore Telephone DSL internet is available and Mt. Rushmore Telephone speeds in different areas. When different max speeds are available at different addresses within a hex, color is determined by the fastest speed.
Colored hexagons indicate where Mt. Rushmore Telephone services at least one address. Internet service is not necessarily available at every location within a colored hex.
Along with DSL, Mt. Rushmore Telephone also offers fiber. See Mt. Rushmore Telephone Fiber Availability.
Broadband Map's information on Mt. Rushmore Telephone DSL availability relies heavily on the December 2025 data from the FCC's Broadband Data Collection program (published May 2026, with FCC revisions through July 2026).