Compare Cell Phone Coverage Maps

About Coverage Critic

Coverage Critic's maps draw on data from the FCC and real-world, crowdsourced signal measurements. Search for a location to compare AT&T, T-Mobile, and Verizon coverage where you live or travel.

Head-to-head comparison maps are also available:

Coverage Critic's work has been referenced or featured by The New Yorker, PCMag, and Mr. Money Mustache. Details about how Coverage Critic earns money and which carriers it partners with are shared on the transparency page. Commentary and analysis on the wireless industry can be found on the Coverage Critic blog.

Standard Coverage Map

The standard coverage map shows native (non-roaming) coverage from major US networks. It displays predicted outdoor signal strength throughout the US.

Crowdsourced Map

The crowdsourced map displays real-world signal measurements. These data points are used for calibration and adjustment of the data underlying the standard map.

Usage

Zoom in for the most detailed coverage data available
Click hexagons for details about a specific area
Use the search bar to find specific places

From the Settings Menu (top right button):

Generate custom sharing links
Hide UI elements (helpful on mobile!)
Explore additional networks (e.g., GCI or Cellcom)
Toggle colorblind-friendly visuals
Switch between maps

Data Sources

Cell coverage data comes primarily from the FCC's Broadband Data Collection Program. The last round of data incorporated in the map was released in November 2025 and represents networks as of June 2025.

New editions of the FCC data are released roughly every 6 months. The FCC data is supplemented and adjusted with crowdsourced, on-the-ground data from DIMO and Roam.

Limitations

The map shows native, non-roaming coverage. Many plans include substantial roaming coverage.
Predicted outdoor, stationary signal strength is shown in the map. Signals may be weaker indoors.
Networks are inconsistent in how they report coverage over bodies of water.