Techniques are presented for identifying mobile devices within a coverage region of a wireless station. Positions for mobile devices, if any, within the coverage region are determined. It is then determined whether the positions are within one or more defined areas, called "notification areas" herein. Additionally, selected mobile devices within notification areas are sent messages. The selected mobile devices are selected via certain criteria, including, for instance, campaign specifications and subscriber information. A message can be sent to a mobile device if the subscriber corresponding to the mobile device has indicated an acceptance of a category of notifications for the message and for the publisher who is publishing the notifications. The category could be traffic conditions and the publisher could be a Department of Transportation having responsibility for a particular freeway. These are two examples of multiple criteria for selecting mobile devices to which messages could be sent.