A Federal Communications Commission call sign database is available at Wireless2.FCC.gov. This site allows users to search for Universal Licensing System licenses by call sign, FCC registration number or name.
Advanced searches of the call sign database let users match call signs and other radio services within specified groups that include amateur licenses, commercial licenses, PCS broadband, pagers and ships. Users can also specify a search only within stated groups, such as general mobile radio, wireless communication services, microwave marine or aviation radio services, TV studio transmitters and microwave boosters, and recreational ships. Under amateur radio signs, users can search for vanity call signs.