Tips for searching the QRZ ham radio callsign database online include trying different search types in the advanced search tool, using broad search terms first, and substituting numbers or letters with wild cards, such as question marks and asterisks. The database at QRZ.com provides more search tips and tricks.
Aside from the regular callsign, name and address searches, the advanced tool contains extra search types, including text from members' biographies, county, grid square and country. A searcher should enter the least amount of information first, such as a last name and state in the name and address search. The callsign and grid square searches allow users to replace question marks or asterisks with unknown letters and numbers.