The map shows where 4 SIWI fiber internet is available and 4 SIWI 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 4 SIWI services at least one address. Internet service is not necessarily available at every location within a colored hex.
Along with fiber, 4 SIWI also offers fixed wireless. See 4 SIWI Fixed Wireless Availability.
Zoom out to view 4 SIWI Fiber availability and speeds at the national level. However, the map works best when zoomed in, exploring 4 SIWI Fiber availability in specific regions.
The availability or speed of service at a single address can dictate the color of the hexagon the address falls within. Accordingly, national-scale views with large hexagons will smooth over local variations in internet availability and speeds.
Broadband Map's information on 4 SIWI fiber availability relies heavily on the June 2026 data from the FCC's Broadband Data Collection program (published October 2026).