|Refer to an online Amateur Service licensee database to determine if the call sign you want is available. This database is available at various sites on the World Wide Web including:
You can also query the FCC's ULS database on the web by accessing the application or license search utilities. These can be accessed at http://www.fcc.gov/wtb/uls. Click on the button labeled 'Application Search' or 'License Search' and use the 'General Search' option.