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Welcome to the Tower ID iPhone/iPad/Android product page.

Use your devices built in 'location services' (GPS or cell-tower/wifi-location) to retrieve antenna site registration information centered on your location from the US FCC 'antenna site registration' (ASR) database of registered wireless communications antenna sites.

The data can be shown as textual data, with clickable links to a particular sites registration details.

The data can also be shown on a Google Map in concert with the other towers in the local area. Both the 'standard' (street map style) or hybrid (street map information overlaid atop satellite imagery) can be viewed.

Tapping on a particular tower (indicated by a violet pin) will call up the FCC ASR details page where you can gather further information on those responsible for the site (often including contact information).

Tower ID requires the use of 'location services' on your device running IOS 5.0 or newer, or Android 2.2 or newer.




The iPhone4 display showing a typical hybrid map image.

If you would like to view just the street map information, without the satellite imagery, just tap the 'Standard' button.



Tapping the 'Data' button brings up the FCC web page showing the results of an ASR search centered on your location (either via GPS/location-services or from your manually entered latitude/longitude info).

The data returned is limited by your selected 'search range', via the slider on the lower right.

At the bottom left is the button to bring up the SETUP menu where you can choose between automatic (GPS) or manual location.

The GPS indictor changes color to reflect the accuracy of the location information it has attained.

Above the GPS indicator are three indicators to show Wifi (green), Cellphone-data (blue) presence.

The globe icon, to the right of the Wifi/Cell icons, confirms the device has connectivity to the FCC database server.

If the globe is GREEN, that connectivity is via Wifi, if it is BLUE, the connectivity is via the cellphone data network. If the indicators are RED, it means you are out of luck-- no connectivity.

The 'Standard' map display shows the street-map view with violet pins to denote registered antenna sites.

Tap one of the pins for more information on that site.

Your present location is shown by a blue dot in the middle of the screen.

As the GPS gets better 'lock' on your location you will notice the blue indicator move somewhat-- and the 'waves' emanating from it will change with improved location accuracy.

At the bottom of the screen are similar indicators of internet and FCC server presence, GPS accuracy, and an indication of how many sites are displayed over your chosen radius.



By tapping the 'Hybrid' button you are provided satellite imagery being the street map information in the map.

Here you can see a typical site callout.

The antenna tower height is shown in meters and feet.

Tap the blue right arrow button for the ASR details of this site from the FCC.


Please note that normal Google map zooming, scrolling, and movement via swiping, pinching and tapping is enabled as you would expect.

The map mode will display up to 40 towers at one time.

If you set the range adjustment too wide for the area you are in and more than 40 registered antenna sites are returned, you will see this popup message.

Tower ID map will still work fine-- but will display just the first 40 sites in the data received (which does not necessarily follow a logical order).

If you see this popup, just remember that not all the possible sites are shown.

The text at the lower right of the screen shows how many sites are shown on the map and what your current site search radius is.

The search range setting is set via the slider at the lower right of the Data page.

After tapping the blue arrow on a displayed sites purple pin you are shown an ASR detail page like this.

You can also get here if you tap the ASR links at the left of the Data display page.

Normal device web page zooming and scrolling is available.

Tapping links on the page will bring you to other pages, which will also enable the BACK button so you can return to the ASR detail page if desired (of course, you could always hit the MAP page to return there).




Tapping the setup icon (the cogged gear) brings up a page where you can select between using your automatic device location for data or setting up a manual location via latitude and longitude.

Please use NAD83 locations for the best accuracy as this is what the system is expecting (you won't break anything if you type in NAD27 info, it just might display a little bit 'off').

Please note the important disclaimer on this page. Tower ID is NOT produced or affiliated with the US government. This app just takes publicly available data from the US govt (Federal Communications Commission ASR database) via the FCC website and displays it in a handy and useful manner. Everything Tower ID displays could be otherwise obtained from the Safari web browser if you were so inclined (and didn't mind wearing down your fingertips in the process).

Sometimes it's rather amazing what gems you can find while perusing the map.

The FCC ASR 'really nailed it' for this building-based antenna site. The accuracy of the database is dependent on site owners providing accurate location data to the government. Sometimes site owners are accurate, and sometimes not quite so.

Please note the image above showing the two towers of an AM broadcast station in the San Francisco Bay--- particularly notice the shadows of the towers in the water and how the pins on the map appear to have 'nailed it' quite well.

When you install Tower ID you will be asked to enable Tower ID to access your current location. You MUST answer OK to this or the app will not function as desired.

Note that the GPS display is RED in this image-- no GPS data is available until you approve the app to receive it.

When you change back to the data display from the map display, or have woken the app up after it had gone 'off screen' (either by sleep timer or you hitting the HOME button) and it senses that you have moved more than a minute in either latitude or longitude it will ask you is you would like to update the data display.

Tower ID will also ask this every time it starts up if the app had been purposefully killed in the task manager, or if the OS had killed the app when 'sleeping' due to needing memory for another app.

Please also be aware that if your device switches between Wifi and Cellular data 'mid stream' during a download of the data that errors are likely to occur. You will notice that the GLOBE icon changes from Green to/from Blue when this occurs. A popup will alert you that there was an error, after which you can tap the RESET icon to try again.


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