A customer premises router identifies contacts based on web sites visited and searches conducted by a user device. The customer premises router also detects phone calls initiated by a user device (e.g., a Voice over IP telephony device), and identifies an association between a phone call to an identified called destination (e.g., a destination telephone number) and an identified contact, based on a prescribed association attribute. The identified associations are stored in nonvolatile memory. Any subsequent web request by a user device and related to the contact causes the customer premises router to supply to the user device the identified association specifying the contact and the identified called destination, enabling a user of the user device to determine the identified called destination for the contact, even if the visited web sites do not provide the identified called destination.