If u seriously need to know then simply go to the site and ask the owner of the premises or nearby shopkeepers.
It is mostly rented but sometimes they buy the space.. I myself rent a roof to Escotel long time ago
That is the only sure way to find out.
If u want to snoop about and find out without tipping anyone
then follow the thick black cable to the control room and look at the name printed on the door. Highly Covert.