Cellular Tower Maps


This website is dedicated to helping map the extent of cellular network coverage. This is done by crowdsourcing data using the CellMapper mobile application. Once the data is received, the coverage areas are calculated and cell phone tower locations are estimated based on available information.

An example of a thoroughly mapped network can be see on the map of T-Mobile 3G coverage of Seattle, WA.

Get Involved

If you do not want to use live upload, use the upload page to upload the CSV files CellMapper produces on your phone.


Enjoy the service this site provides? If so, please consider donating in order to fund the monthly operational cost of the site. Donating ensure the site remains ad-free unlike many similar sites.


April 10, 2014
The site now has a valid SSL certificate. You can now visit https://www.cellmapper.net/ to browser the site more securely.
Look for an update to the app, to upload via the SSL option, in the near future!

March 23, 2014
Added estimated frequency band for AT&T LTE and Bell/Telus UMTS (Western Canada only). If you know the cellid layout relating to fixed frequency bands for a provider, please let us know.
Added last generated date per provider, so you can see when the latest updates were made.

Dec 24, 2013
Updated site to generate 1 extra zoom layer of signal data
Updated backend to improve data generation performace

Nov 11, 2013
Updated frequency calculator to support more LTE bands (now supports 1 to 44)

May 21, 2013
Added a new RSS feed for tower updates. You can Subscribe for updates using your favourite RSS reader or get individual network updates by viewing the map of the provider and clicking the "subscribe for updates link"

May 12, 2013
CellMapper for BB updated to 0.1.3. Please update for latest bugfixes.

April 11, 2013
Added date filters to the map.

April 8, 2013
CellMapper 2.5.1 released!
This version of CellMapper integrated maps into CellMapper, and allows for both locally calculated data or data from the site to be displayed within the app itself. Some new features:
- Completely new layout based on fragments, now you can swipe to move to different screens
- Locally calculated maps (see the "Change Provider" dialog for details)
- Local database which stores data for later upload if you choose not to enable live uploading
- Neighbour cell logging and upload
- Now supports tablets without a cell radio!

Give it a try on the Play Store!

January 27, 2013
A beta version of CellMapper for Android is available with integrated maps and major overhaul. Give it a try here

October 8, 2012
Moved to a new, much more power, server. This should allow for map generation up to 5 times a day

October 2, 2012
New CellMapper for BB version released

September 22, 2012
Implemented LTE (EARFCN) calculator/site support (Band 1 - 24 only)

September 18, 2012
Added (U)ARFCN frequency calculator (see link on main menu)
Implemented region specific ARFCN/UARFCN decoding on the maps (for example, GSM ARFCNs in North American 1900 MHz and World 1800 MHz overlap
LTE (EARFCN) coming soon

September 16, 2012
Added tower heatmap
Added ability to toggle towers/signal trails
Fixed a bug preventing uploads since yesterdays change (all data has been replayed)

September 15, 2012
Fixed HSPA+ support
Made system subtype per sector
Backend changes for upload/database normalization

August 24, 2012
Improved map experience on mobile browsers (larger buttons)
Fixed an error where the map would say no towers are visible when there are
Fixed changing network not properly selecting the default of another network/inability to change network type when only 1 is present

May 29, 2012
Map updated to have signal trails/towers separated by technology
Completely rewritten BlackBerry client, tells you the current frequency righy away

It also supports CDMA and tells you the frequency

Give it a try in the CellMapper for BlackBerry section

April 29, 2012
VisualCell 0.1.0 released

April 14, 2012
Now using CDMA tower location data (part of CDMA spec) when calculating tower location
Multiple tower that overlap at maximum zoom now moved apart once clicked

April 8, 2012
Many backend changes to fix LTE/CDMA issues
CDMA tower location is now very accurate if the phone returns the location of the base station (most Android phones)
Fixed an issue where LTE towers are never "accurate" on the map

April 7, 2012
Multiple CellMapper releases to fix CDMA/LTE bugs
Map has been updated to have move wiki links
Backend improvements to triangulation. Providers such as Bell/Telus UMTS are now much more accurate

March 27, 2012
Released CellMapper 1.2.1 with iDEN and LTE support
Map support for iDEN/LTE with proper signal to colour mappings

March 14, 2012
Added region toggle to filter by region

March 4, 2012
Launched new map layout (mobile friendly).
Lots of new changes:
- Database has been normalized, which has yielded a significant performance hit
- Cache tracking of individual towers and tiles to avoid regeneration unless there is new data.
- 2G/3G toggle
- Direction of cell is now calculated
- Many more zoom levels
- Cleaner layout/faster

Privacy Policy and License Agreement
This application is free to use for personal use only and I assume no responsibility for any damage this application may cause inadvertantly.
This application generates a CSV file that stores your current location, cell phone tower, and signal strength. Likewise, live upload will send this information directly to the site.
This web site stores your IP address and any requests you make or files you submit. This information will not be made publically available in an identifiable manner.

Contact: contact /at\ cellmapper.net