Identification of radio coverage of a mobile station (MS) via a pico cell, such as an IP-BTS in a user premises (e.g. residence or business customer location), enables a mobile/wireless service provider to differentiate between coverage under a pico cell and coverage under a macro network. In a disclosed example, when the MS requests registration/authentication through a pico cell, a related signaling message includes a pico cell identifier (pID). A home location register (HLR) is provisioned with a pID, so that the HLR can decide to accept or reject the registration/authentication requests. For example, if the particular MS is provisioned for services from a specific pico cell, the HLR will grant the registration/authentication and allow the network to process calls for the mobile station through the identified pico cell. This enables the provider to allow discounted services through pico cell, e.g. as a replacement for a landline.