FCC COVERAGE CHECKER · USA

Find the best cell carrier for your ZIP code.

Enter a US ZIP code. We compare AT&T, T-Mobile and Verizon on the coverage each carrier files with the FCC, outdoors and in a moving car, and show whether one of them really covers more of your area.

Built on the FCC National Broadband Map: carrier filings as of December 31, 2025, published September 15, 2026.

No sign-up. Works for any US ZIP code with a land area.

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Nationwide, by share of US area

How much of the United States each carrier reports covering outdoors, from its FCC filing as of December 31, 2025. Across all carriers, 69.8% of the country's area has 4G LTE from at least one of them and 50.5% has 5G.

AT&T
Share of US area, outdoors
4G LTE
57.4%
5G 7/1
34.2%
T-Mobile
Share of US area, outdoors
4G LTE
47.3%
5G 7/1
40.7%
Verizon
Share of US area, outdoors
4G LTE
60.9%
5G 7/1
21.9%

How NetScanAI works

01

Your ZIP code

We find the town your ZIP code mostly lies in, using the Census Bureau's ZIP-to-place files. If most of the ZIP is outside any town, we use its county and say so.

02

The carriers' own filings

Twice a year every carrier must tell the FCC where it offers 4G LTE and 5G. The FCC publishes the share of each town, county and state inside each filing.

03

No invented scores

We show the FCC's percentages as they are. When the three carriers are within 5 points of each other we say no carrier wins, rather than crown one.

04

Check before you switch

A filing is what a carrier says, not a drive test. Each result links to that carrier's own map, where you can check your street address.

Coverage in the largest US cities

All 50 states and DC →

FAQ

Where does NetScanAI get its coverage data?

From the FCC National Broadband Map. Carriers file where they offer 4G LTE and 5G service, and the FCC publishes, for every state, county and Census place, the share of the area inside each carrier's filing. The current figures are as of December 31, 2025, published by the FCC on September 15, 2026.

Are these numbers measured signal?

No. They are the maps each carrier must file with the FCC. The public can challenge them through the FCC, but they are not drive-test measurements. Treat them as each carrier's own claim, and check the carrier's map for your exact address.

What do "outdoor" and "in car" mean?

The FCC asks carriers for two maps: where a phone standing still outdoors gets service, and where a phone in a moving vehicle does. The in-car figure is always lower. Indoor signal is not part of the filing.

Is NetScanAI free?

Yes, with no account and nothing to sign up for. The ZIP code you enter is sent to our server to look up the FCC figures for it.