Network traffic is received from an unrecognized guest device on a computer network. A user profile server is queried to determine a user identifier that is associated with the device identifier of the unrecognized guest device. A login database is queried to find an unexpired login record of an authorized guest device associated with the user identifier. The unexpired login record grants the authorized guest device access to the network service with a service entitlement for an allowed access duration, and a stored device identifier in the unexpired login record of the authorized guest device is different from the device identifier of the unrecognized guest device. The service entitlement of the network service specified in the unexpired login record is shared between the authorized guest device and the unrecognized guest device for a remaining portion of the allowed access duration of the unexpired login record of the authorized guest device.