Methods and apparatus, including computer program products, for signaling in a network. A method of signaling in a network includes determining in a first end station a destination telephone network address of a second end station and determining in the first end station an intermediate Internet address corresponding to the destination telephone network address. In response to determining the intermediate Internet address, the method retrieves an Internet address of the second end station from an address list at the intermediate Internet address and establishes an end-to-end Internet connection between the first end station and the second end station with the Internet address of the second end station.