Briefly, example methods, apparatuses, and/or articles of manufacture may be implemented to authenticate a communications device via a communications network. One embodiment may include obtaining, via a communications network coupled to a client computing resource, signals indicative of the subscriber identifier. The signals indicative of the subscriber identifier may facilitate computing a contactability metric of a communications device corresponding to the subscriber identifier, wherein the contactability metric is to relate to a likelihood that the communications device can be electronically contacted within a predetermined interval, the contactability metric being computed responsive to obtaining signals from one or more databases accessible to an authenticator, the obtained signals being indicative of an outcome of one or more events, such as determining a type of the communications device, as well as records pertaining to a number of additional signals indicating events that relate to activities of a communications device.