Spectrum Mobile vs AT&T Coverage Map
The map compares native (non-roaming) Spectrum Mobile and AT&T coverage across the United States.
Map Usage
- Zoom close for the most detailed coverage data
- Use the search bar to compare Spectrum Mobile and AT&T in a specific location
- Switch view modes to surface different comparisons
- Overlay: Shows distinct coverage areas of each carrier
- Winner: Colors each area by which carrier has better signal or better percent coverage
- Difference: Uses color intensity to show the magnitude of signal or coverage differences
Technical Notes
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Real-world relevance: When comparing Spectrum Mobile and AT&T signal strength,
the map's difference view uses predicted RSRP values but colors hexagons based on expected real-world impact. A difference between -125 dBm
and -100 dBm (poor to fair) has greater visual impact than a difference between -90 dBm and -65 dBm (excellent to especially excellent).
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Metrics with high zoom: Zoom in for the most detailed picture. At the highest zoom levels (smallest hexagons),
the Winner and Difference views show signal strength comparisons between Spectrum Mobile and AT&T.
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Metrics with low zoom: When zoomed out (larger hexagons), comparisons are generally based on
coverage percentage within each hex. Signal strength is only compared when both Spectrum Mobile and
AT&T have 100% coverage of a hex. ⓘ
Data Sourcing
Cell coverage data for Spectrum Mobile and AT&T comes primarily from the November 2025 release of the FCC's Broadband Data Collection program (representing networks as of June 2025), supplemented with real-world measurements from large crowdsourcing projects.
