Methods and apparatuses to connect telephone calls and track information about the telephone calls resulting from advertisements for groups of advertisers. In one embodiment, a method includes: determining a geographic area after receiving a telephone call to a first telephone number publicized in an...http://www.google.com/patents/US20050216345?utm_source=gb-gplus-sharePatent US20050216345 - Methods and apparatuses for offline selection of pay-per-call advertisers
