Which tower am I on, and which way do I point?
Enter an address to see the cell towers around it, which carriers are probably on each one, the compass bearing to aim at, and the signal to expect over the hills and trees in between.
Coordinates work too, like 34.0128, -83.9097. Address suggestions powered by Geoapify.
Free. Covers the lower 48 states, Hawaii and Washington, DC.
How it works
- Finds the structuresTowers, masts and rooftop sites from FCC antenna registrations and OpenStreetMap, with their heights where they're recorded.
- Works out the carriersPhone sightings of each carrier's cells are matched to the nearest structures. A carrier's own FCC microwave license on a structure marks it as licensed, which is close to certain.
- Predicts the signalEach path is traced over USGS elevation and a tree-height map. Any single path can be refined with USGS lidar, which also picks up buildings.
Reading the results
Signal score
0 to 10. About 6 and up is solid; under 3 is weak or unusable. 0 is -120 dBm RSRP, 10 is -70 dBm.
Carrier match
How sure the carrier is. Licensed: its own FCC license is on the structure. Likely and possible: phone sightings nearby.
Bearing
Where to aim, from true north and on a compass, with your area's magnetic correction applied.
Path analysis
A side view of the ground and trees between you and one tower, the tilt, and the full calculation.
How accurate is it?
Tower positions come from official registrations. The carrier on each tower is an estimate, and right more often for bigger towers. The signal is a range, because carriers don't publish their antenna heights, tilt or power; real readings usually land inside it. Congestion isn't modeled, so a strong signal can still be slow at busy times. Check your phone's field-test reading against the prediction before you buy hardware.
Setting up a point-to-point link?
The line-of-sight tool checks every tower around a spot for a clear path, at your antenna height and frequency.
Open line of sightBuilt by Nate Cordero from public data: FCC antenna registrations and microwave licenses, OpenStreetMap, OpenCelliD, USGS 3DEP elevation and lidar, and ETH Zurich's global canopy-height map.