A method and system for providing computer-network related information about a second party. First, the second party receives a telephone number of a first party. The second party's customer premises equipment (CPE) or elements in a telephone network then use the telephone number to index a database, which contains combinations of telephone numbers and computer-network addresses. Once the first party's computer-network address is retrieved, first-party-customized information present at the computer-network location specified by the computer-network address can be sent to and displayed on the second party's CPE. Also the first party's telephone number can be sent to an application in the computer network, causing the first-party-customized information to be automatically displayed on the second party's CPE.