There are a number of ways to search for the "doing business as" registrations that have been collected by local governments. Many of these are fee-based services, although there may be links to free alternatives at the Search Systems public record databases site. For example, there is a link to Hawaii Business Name Search, a possibly comprehensive "doing business as" registry for Hawaii, provided by the state of Hawaii.

• "Doing Business As" Records Search (from KnowX.com)
• researching businesses (from CDB Infotek)
• Fictitious Business Name online search (from Experian Information Solutions)