The present invention provides an Internet based system and method for monitoring the location of a subject at any time via telephone voice verification. The system and method enables an agency officer to enroll a subject's profile into a computerized system. The subject then responds to a series of verbally answered questions, the responses to which are utilized to establish a voice signature for the subject. Subsequently, the system and method automatically and periodically contacts the subject at pre-determined locations at pre-determined times to verify the subject's actual presence at the locations via voice verification software. The present invention also enables the agency officer to monitor and review compliance efforts implemented by the Internet based system while also providing notifications of non-compliance by the subject to the agency officer under criteria previously established by the officer.