The Department of Justice recently launched a National Sex Offender Public Registry with which users can submit a single national query to obtain information about sex offenders.
Wisconsin is one of about 20 states currently included in the registry. However, according to the DOJ, data from all 50 states and the District of Columbia will be available by the end of the year.
The registry is a cooperative effort between the state agencies hosting public sexual offender registries and the federal government.