Server usage policy
We are in principle happy for the OpenCellID information to be used by anybody for creative and may be even unexpected uses.
However, OpenCellID's community servers are run entirely on donated resources.
OpenCellID data is free for everyone to use. The community servers are not.
Below are the minimum requirements that users of the OpenCellID community servers must adhere to. These may change in the future depending on available resources.
Because OpenCellID data is free, other organisations provide services made from OpenCellID data. If your project does not meet these requirements, please obtain your OpenCellID data elsewhere or run your own servers.
Download of complete data files
The cell tower data file provided at  changes once per day at approx. 3am (UTC time) and can be downloaded once per day per apiKey
Most of the measurements files provided at  do not change at all.
Therefore only the measurement file with the latest data can be downloaded automatically once per day per apiKey.
Technical usage requirements
Note: modern web browsers in standard configuration generally pass all the above technical requirements.
Changes to this policy
This policy may change at any time subject to the needs and constraints of the project. Commercial services, or those that seek donations, should be especially aware that access may be withdrawn at any point; you may no longer be able to serve your paying customers if access is withdrawn.
Alternative OpenCellID service providers
Setting up your own OpenCellID server: please contact Markus for support.