AT&T vs Spectrum Mobile Coverage Map
The map compares native (non-roaming) AT&T and Spectrum Mobile coverage across the United States.
Usage
- Zoom close for the most detailed coverage data
- Use the search bar to compare AT&T and Spectrum Mobile 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
-
Real-world relevance: When comparing AT&T and Spectrum Mobile 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).
-
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 AT&T and Spectrum Mobile.
-
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 AT&T and
Spectrum Mobile have 100% coverage of a hex. ⓘ
Data Sourcing
Cell coverage data for AT&T and Spectrum Mobile comes largely from the November 2025 release of the FCC's Broadband Data Collection program
(representing networks as of June 2025) with supplementation from massive crowdsourcing efforts.
