If you drive for a living or live on the road, the coverage that matters is not where a phone works standing still, but where it keeps working at speed between towns. The FCC collects exactly that: every carrier files a second map for a phone in a moving vehicle. On the filing as of December 31, 2025 it covers far less ground than the outdoor map, for all three.
By share of US area with 4G LTE in a moving car, AT&T reports 35.3%, Verizon reports 26.9% and T-Mobile reports 20.7%. Outdoors the order is Verizon, AT&T and T-Mobile.
In the car vs standing outdoors
Each carrier's in-car share against its outdoor share. The gap is the land where a phone that works at a rest stop may drop the call on the road.
| Carrier | 4G LTE, in a car | 4G LTE, outdoors | Lost in the car (points) |
|---|---|---|---|
| AT&T | 35.3% | 57.4% | 22.1 |
| Verizon | 26.9% | 60.9% | 34 |
| T-Mobile | 20.7% | 47.3% | 26.6 |
Share of total US area. Source: FCC National Broadband Map, carrier filings as of December 31, 2025. Share of area where each carrier reports 4G LTE or 5G to a phone outdoors. Carrier-reported, not measured.
In-car coverage in every state
Each carrier's in-car share of the state's area, and the in-car leader under the same water rule as the rest of the site. AT&T leads in 36, T-Mobile leads in 1 and Verizon leads in 1; 13 have no clear in-car leader.
| State | AT&T, in a car | T-Mobile, in a car | Verizon, in a car | In-car leader | Outdoor leader | |
|---|---|---|---|---|---|---|
| Alabama | 46.4% | 20.2% | 34.5% | AT&T | Verizon (AT&T close behind) | View → |
| Alaska | 1.4% | No FCC row | 0.7% | Low from all three | Low from all three | View → |
| Arizona | 32.1% | 18.3% | 20.2% | AT&T | AT&T (Verizon close behind) | View → |
| Arkansas | 41.1% | 20.4% | 39.4% | AT&T (Verizon close behind) | Verizon | View → |
| California | 36.2% | 26.8% | 33.6% | No clear leader on land (4.8% water) | Verizon (AT&T close behind) | View → |
| Colorado | 41.3% | 19.3% | 18% | AT&T | AT&T | View → |
| Connecticut | 57.4% | 37.4% | 50% | AT&T (Verizon close behind) | No clear leader on land (12.6% water) | View → |
| Delaware | 59.2% | 43.7% | 70.3% | No clear leader on land (21.7% water) | No clear leader on land (21.7% water) | View → |
| District of Columbia | 97.3% | 95.3% | 94.9% | Tie (within 5 points) | Tie (within 5 points) | View → |
| Florida | 46% | 27.2% | 49.9% | No clear leader on land (24.9% water) | Verizon (AT&T close behind) | View → |
| Georgia | 47.1% | 23% | 39.5% | AT&T (Verizon close behind) | Verizon | View → |
| Hawaii | 20% | 14.5% | 35.1% | No clear leader on land (41.5% water) | No clear leader on land (41.5% water) | View → |
| Idaho | 27.4% | 19.5% | 14.2% | AT&T | Verizon (AT&T close behind) | View → |
| Illinois | 72.1% | 44.9% | 58.8% | AT&T | Verizon (AT&T close behind) | View → |
| Indiana | 65.2% | 41.3% | 58% | AT&T | Verizon (AT&T close behind) | View → |
| Iowa | 44.1% | 61.4% | 54.5% | T-Mobile | Verizon (T-Mobile close behind) | View → |
| Kansas | 54.9% | 37.5% | 41% | AT&T | Verizon (AT&T close behind) | View → |
| Kentucky | 46% | 23.9% | 31.9% | AT&T | AT&T (Verizon close behind) | View → |
| Louisiana | 53.2% | 27% | 32.1% | AT&T (Verizon close behind) | No clear leader on land (17.5% water) | View → |
| Maine | 14.5% | 10% | 20.5% | Low from all three | Verizon | View → |
| Maryland | 54.6% | 40.1% | 53.5% | No clear leader on land (21.7% water) | No clear leader on land (21.7% water) | View → |
| Massachusetts | 50.1% | 35.3% | 55% | No clear leader on land (26.1% water) | No clear leader on land (26.1% water) | View → |
| Michigan | 31.6% | 13.6% | 26.8% | No clear leader on land (41.5% water) | No clear leader on land (41.5% water) | View → |
| Minnesota | 64.1% | 26.5% | 45.5% | AT&T | AT&T (Verizon close behind) | View → |
| Mississippi | 49.4% | 22% | 21.2% | AT&T | AT&T (Verizon close behind) | View → |
| Missouri | 52.2% | 30.4% | 37% | AT&T | Verizon (AT&T close behind) | View → |
| Montana | 22.5% | 17.1% | 14.4% | AT&T (T-Mobile close behind) | Verizon | View → |
| Nebraska | 39.2% | 33.4% | 29.8% | AT&T | Verizon | View → |
| Nevada | 27.6% | 11.3% | 22.5% | AT&T (Verizon close behind) | AT&T (Verizon close behind) | View → |
| New Hampshire | 46% | 22.4% | 32.8% | AT&T | Verizon (AT&T close behind) | View → |
| New Jersey | 71.4% | 43.1% | 70.8% | AT&T (Verizon close behind) | Verizon (AT&T close behind) | View → |
| New Mexico | 39.9% | 22% | 18.5% | AT&T | AT&T | View → |
| New York | 47.4% | 20.3% | 39.7% | AT&T (Verizon close behind) | Verizon (AT&T close behind) | View → |
| North Carolina | 50.1% | 29.7% | 43.8% | AT&T (Verizon close behind) | Verizon (AT&T close behind) | View → |
| North Dakota | 66.6% | 27.7% | 53.5% | AT&T | Verizon (AT&T close behind) | View → |
| Ohio | 73.2% | 39.6% | 65.2% | AT&T (Verizon close behind) | Verizon (AT&T close behind) | View → |
| Oklahoma | 59.9% | 43.5% | 45.7% | AT&T | No clear leader on land (1.9% water) | View → |
| Oregon | 31.2% | 16.3% | 21.8% | AT&T | Verizon (AT&T close behind) | View → |
| Pennsylvania | 53.6% | 31.4% | 46.6% | AT&T (Verizon close behind) | Verizon (AT&T close behind) | View → |
| Rhode Island | 54.4% | 38.7% | 66.3% | No clear leader on land (33.1% water) | No clear leader on land (33.1% water) | View → |
| South Carolina | 55.5% | 30.8% | 43.1% | AT&T | Verizon (AT&T close behind) | View → |
| South Dakota | 63.6% | 26.1% | 45.7% | AT&T | Verizon (AT&T close behind) | View → |
| Tennessee | 48% | 26.8% | 33% | AT&T | Verizon (AT&T close behind) | View → |
| Texas | 52.1% | 32.6% | 40.5% | AT&T | Verizon (AT&T close behind) | View → |
| Utah | 33.7% | 18% | 18.6% | AT&T | AT&T (Verizon close behind) | View → |
| Vermont | 31% | 12.6% | 29.1% | AT&T (Verizon close behind) | Verizon | View → |
| Virginia | 36.3% | 24.5% | 39.1% | Verizon (AT&T close behind) | Verizon | View → |
| Washington | 33.7% | 25.4% | 27% | No clear leader on land (6.8% water) | Verizon (AT&T close behind) | View → |
| West Virginia | 26.3% | 17.3% | 17.9% | AT&T | Verizon (AT&T close behind) | View → |
| Wisconsin | 36.6% | 25.9% | 30.4% | No clear leader on land (17.3% water) | No clear leader on land (17.3% water) | View → |
| Wyoming | 28.1% | 15.1% | 10.6% | AT&T | AT&T | View → |
Source: FCC National Broadband Map, carrier filings as of December 31, 2025. Share of area where each carrier reports 4G LTE or 5G to a phone outdoors. Carrier-reported, not measured.
Where the in-car leader is a different carrier
In 25 states the carrier that leads in a moving car is not the one that leads outdoors: Alabama, Arkansas, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Vermont and West Virginia. If you drive there more than you stand still there, go by the in-car column.
The states with the least in-car coverage
Ranked by the best carrier's in-car share. In these states, even the strongest network files a moving-vehicle map over a minority of the land.
| State | Best in-car carrier | Its in-car share | Its outdoor share | |
|---|---|---|---|---|
| Alaska | AT&T | 1.4% | 4.2% | View → |
| Maine | Verizon | 20.5% | 56.4% | View → |
| Montana | AT&T | 22.5% | 42.8% | View → |
| West Virginia | AT&T | 26.3% | 49.4% | View → |
| Idaho | AT&T | 27.4% | 45% | View → |
| Nevada | AT&T | 27.6% | 52% | View → |
| Wyoming | AT&T | 28.1% | 53.7% | View → |
| Vermont | AT&T | 31% | 63.7% | View → |
| Oregon | AT&T | 31.2% | 54.3% | View → |
| Michigan | AT&T | 31.6% | 49.7% | View → |
Source: FCC National Broadband Map, carrier filings as of December 31, 2025. Share of area where each carrier reports 4G LTE or 5G to a phone outdoors. Carrier-reported, not measured.
County by county
Of 3,083 counties where all three carriers file, AT&T leads in 2193, Verizon leads in 388 and T-Mobile leads in 136, and 366 have no clear leader. That is on the in-car map. In the 467 counties where coverage runs out, the in-car leads split AT&T 339, Verizon 46 and T-Mobile 13, with 69 too close to call.
What the in-car map does not cover
It is the carrier's own filing, not a drive test, and it is a share of area, not of road miles: a state's figure counts mountains and desert that no road crosses. It does not single out highways, truck stops or campgrounds. Check your regular routes on the state pages, and a stop you depend on with the FCC map's address search.