OpenCellId

This project is an open source project, aiming to create a complete database of CellID worlwide, with their locations
Project will provides free access to tools, data to not only create this database, but also retreive location informations.

Project is leaded by 8Motions 8Motions a leading provider of geolocalized solutions for mobile devices...
Note:If you want a professional CellID Database, I suggest you to go to Navizon who provides top services and databases.

The project is hosted on Google Code, and all the sources are freely available... If you are interested by contributing to the project, drop us a line

But what is a CellID?: a CellID is the unique number of a GSM cell for a given operator. Your phone is always connected to a Cell, and by nowing this number, you know the Cell, and by knowing the position of the cell, you know where you are. There is some accuracy issue, as the cell can cover from several hundreds of meters to several kilometers, but this could be a very good starting point to locate yourself.

To extend the database, you can Download clients