Method and apparatus for maintaining state information on a client device configured for voice-over-internet protocol (VOIP) communication is described. In one example, a VOIP call between the client device and an endpoint device through a packet network is established. State information is sent from the client device to the endpoint device during the VOIP call. The state object having the state information embedded therein is received from the endpoint device at the client device. The state object is stored in the client device. The state object may be retrieved from the client device during the VOIP call or a subsequent VOIP call in response to an authenticated request from the endpoint device. Alternatively, the state object may be retrieved from the client device during a subsequent web session in response to an authenticated request from a host.