Signalchecker.com

Check Cell Coverage by zip code for all US networks with one search


    Check Cell Coverage

    Cell Signal Coverage data for the whole of the USA

    Our database contains cell coverage information for AT&T, US-Cellular, T-Mobile and Verizon.

    Results show indoor and outdoor coverage for Voice calls, 3G data, 4G data and 5G data for every zip code in the USA for each mobile network.

    What these results mean

    These results show what the cell signal for each network should be in the postcode you've searched for.

    We are confident that these results will be accurate, however sometimes signal conditions may vary slightly within a zip code.

    Cell phone signal levels can be affected by a number of different things:

    Your location - the further away you are from a cell phone tower the weaker your signal will be, as the signal gets weaker this affects the signal quality which will reduce your data download speeds.

    Your local environment - hills, buildings, being in a basement or underground will all affect your cell signal.

    Travelling - if you are in a car or train and moving fast you may find your signal will be affected as you move from strong signal areas to weak or no signal areas.

    Your phone - some models of phones are just better at getting a signal than others, a phone with low battery can also affect the way your phone works depending on the model.

    The Weather - believe it or not even the weather can interfere with your cell signal, heavy rain and snow can degrade the signal temporarily.

    Before choosing a cell phone network always check their own coverage checkers:

    AT&T Coverage Checker

    T-Mobile Coverage Checker

    U.S. Cellular Coverage Checker

    Verizon Coverage Checker