OpenCellID - OpenCelliD is the largest Open Database of Cell Towers & their locations. You can geolocate IoT & Mobile devices without GPS, explore Mobile Operator coverage and more!
OpenSignal - Mobile analytics and insights on wireless connectivity from Opensignal, the independent global standard for understanding the true state of the world's mobile network.
CellID Finder - Find a cell phone location using LAC/CellID, GSM BTS coordinates
wigle.net - WiGLE (Wireless Geographic Logging Engine)
SnoopSnitch - Collects and analyses mobile radio data to make you aware of your mobile network security and to...
GSM Spy Finder - Detect IMSI/IMEI/TMSI catchers and interception of voice and data over GSM networks