1. A communications system comprising: at least one mobile wireless communications device for contacting a given entity having a telephone number associated therewith, via an outgoing communication; and an advertising server for storing identities of accepted advertisers, storing a contact history for said at least one mobile wireless communications device, identifying the given entity contacted by the outgoing communication based upon the telephone number, identifying at least one property associated with the given entity and comprising a business category, predicting a contact with the given entity based upon the contact history, selectively sending a targeted advertisement to said at least one mobile wireless device based upon the at least one property, the accepted advertisers, and the predicted contact.