You can look up court case numbers at Pacer.gov, states the Administrative Office of the U.S. Court. The Public Access to Court Electronic Records is an online service provided by the Federal Judiciary that allows users to obtain case and docket information online.
You can use the Case Locator function at Pacer.gov to conduct nationwide searches for U.S. district, bankruptcy and appellate courts. Second, if you know the location of a case, you can access the individual court's website.
You must register for a free account at Pacer.gov before using the service. As of 2015, there are per-page fees for case information, but there are no fees if usage totals less the $15 in a quarter.
If you do not want to register for an account, you can search for court records on state government websites, according to Massachusetts Poverty Law Advocates. Online access to court records varies by state. Some states have centralized databases, while others are organized by county. Most states provide access to civil and family law cases, and some list traffic violations and criminal records.
Some states restrict access to case information to people named in the case or lawyers who are members of that state's bar association, states Massachusetts Poverty Law Advocates.